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e04f198bc6f1a979d14b6349e3a0e610c2b9d59b
DynamORM/AmalgamationTool/DynamORM.Amalgamation.cs
grzegorz.russek e04f198bc6
2014-05-09 10:59:41 +00:00

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/*
* DynamORM - Dynamic Object-Relational Mapping library.
* Copyright (c) 2012, Grzegorz Russek (grzegorz.russek@gmail.com)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* See: http://opensource.org/licenses/bsd-license.php
*
* Supported preprocessor flags:
* * DYNAMORM_OMMIT_OLDSYNTAX - Remove dynamic table functionality
* * DYNAMORM_OMMIT_GENERICEXECUTION - Remove generic execution functionality
* * DYNAMORM_OMMIT_TRYPARSE - Remove TryParse helpers (also applies DYNAMORM_OMMIT_GENERICEXECUTION)
*/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Data;
using System.Data.Common;
using System.Dynamic;
using System.IO;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.Serialization;
using System.Text;
using DynamORM.Builders;
using DynamORM.Builders.Extensions;
using DynamORM.Builders.Implementation;
using DynamORM.Helpers;
using DynamORM.Helpers.Dynamics;
using DynamORM.Mapper;
[module: System.Diagnostics.CodeAnalysis.SuppressMessage("StyleCop.CSharp.MaintainabilityRules", "SA1402:FileMayOnlyContainASingleClass", Justification = "This is a generated file which generates all the necessary support classes.")]
[module: System.Diagnostics.CodeAnalysis.SuppressMessage("StyleCop.CSharp.MaintainabilityRules", "SA1403:FileMayOnlyContainASingleNamespace", Justification = "This is a generated file which generates all the necessary support classes.")]
namespace DynamORM
{
/// <summary>Small utility class to manage single columns.</summary>
public class DynamicColumn
{
#region Enums
/// <summary>Order By Order.</summary>
public enum SortOrder
{
/// <summary>Ascending order.</summary>
Asc,
/// <summary>Descending order.</summary>
Desc
}
/// <summary>Dynamic query operators.</summary>
public enum CompareOperator
{
/// <summary>Equals operator (default).</summary>
Eq,
/// <summary>Not equal operator.</summary>
Not,
/// <summary>Like operator.</summary>
Like,
/// <summary>Not like operator.</summary>
NotLike,
/// <summary>In operator.</summary>
In,
/// <summary>Less than operator.</summary>
Lt,
/// <summary>Less or equal operator.</summary>
Lte,
/// <summary>Greater than operator.</summary>
Gt,
/// <summary>Greater or equal operator.</summary>
Gte,
/// <summary>Between two values.</summary>
Between,
}
#endregion Enums
#region Constructors
/// <summary>Initializes a new instance of the <see cref="DynamicColumn" /> class.</summary>
public DynamicColumn()
{
}
/// <summary>Initializes a new instance of the <see cref="DynamicColumn" /> class.</summary>
/// <remarks>Constructor provided for easier object creation in queries.</remarks>
/// <param name="columnName">Name of column to set.</param>
public DynamicColumn(string columnName)
: this()
{
ColumnName = columnName;
}
/// <summary>Initializes a new instance of the <see cref="DynamicColumn" /> class.</summary>
/// <remarks>Constructor provided for easier object creation in queries.</remarks>
/// <param name="columnName">Name of column to set.</param>
/// <param name="oper">Compare column to value(s) operator.</param>
/// <param name="value">Parameter value(s).</param>
public DynamicColumn(string columnName, CompareOperator oper, object value)
: this(columnName)
{
Operator = oper;
Value = value;
}
#endregion Constructors
#region Properties
/// <summary>Gets or sets column name.</summary>
public string ColumnName { get; set; }
/// <summary>Gets or sets column alias.</summary>
/// <remarks>Select specific.</remarks>
public string Alias { get; set; }
/// <summary>Gets or sets aggregate function used on column.</summary>
/// <remarks>Select specific.</remarks>
public string Aggregate { get; set; }
/// <summary>Gets or sets order direction.</summary>
public SortOrder Order { get; set; }
/// <summary>Gets or sets value for parameters.</summary>
public object Value { get; set; }
/// <summary>Gets or sets condition operator.</summary>
public CompareOperator Operator { get; set; }
/// <summary>Gets or sets a value indicating whether this condition will be treated as or condition.</summary>
public bool Or { get; set; }
/// <summary>Gets or sets a value indicating whether start new block in where statement.</summary>
public bool BeginBlock { get; set; }
/// <summary>Gets or sets a value indicating whether end existing block in where statement.</summary>
public bool EndBlock { get; set; }
/// <summary>Gets or sets a value indicating whether set parameters for null values.</summary>
public bool? VirtualColumn { get; set; }
/// <summary>Gets or sets schema representation of a column.</summary>
/// <remarks>Workaround to providers issues which sometimes pass wrong
/// data o schema. For example decimal has precision of 255 in SQL
/// server.</remarks>
public DynamicSchemaColumn? Schema { get; set; }
#endregion Properties
#region Query creation helpers
#region Operators
private DynamicColumn SetOperatorAndValue(CompareOperator c, object v)
{
Operator = c;
Value = v;
return this;
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.Eq"/> and
/// <see cref="DynamicColumn.Value"/> to provided <c>value</c>.</summary>
/// <param name="value">Value of parameter to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn Eq(object value)
{
return SetOperatorAndValue(CompareOperator.Eq, value);
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.Not"/> and
/// <see cref="DynamicColumn.Value"/> to provided <c>value</c>.</summary>
/// <param name="value">Value of parameter to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn Not(object value)
{
return SetOperatorAndValue(CompareOperator.Not, value);
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.Like"/> and
/// <see cref="DynamicColumn.Value"/> to provided <c>value</c>.</summary>
/// <param name="value">Value of parameter to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn Like(object value)
{
return SetOperatorAndValue(CompareOperator.Like, value);
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.NotLike"/> and
/// <see cref="DynamicColumn.Value"/> to provided <c>value</c>.</summary>
/// <param name="value">Value of parameter to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn NotLike(object value)
{
return SetOperatorAndValue(CompareOperator.NotLike, value);
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.Gt"/> and
/// <see cref="DynamicColumn.Value"/> to provided <c>value</c>.</summary>
/// <param name="value">Value of parameter to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn Greater(object value)
{
return SetOperatorAndValue(CompareOperator.Gt, value);
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.Lt"/> and
/// <see cref="DynamicColumn.Value"/> to provided <c>value</c>.</summary>
/// <param name="value">Value of parameter to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn Less(object value)
{
return SetOperatorAndValue(CompareOperator.Lt, value);
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.Gte"/> and
/// <see cref="DynamicColumn.Value"/> to provided <c>value</c>.</summary>
/// <param name="value">Value of parameter to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn GreaterOrEqual(object value)
{
return SetOperatorAndValue(CompareOperator.Gte, value);
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.Lte"/> and
/// <see cref="DynamicColumn.Value"/> to provided <c>value</c>.</summary>
/// <param name="value">Value of parameter to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn LessOrEqual(object value)
{
return SetOperatorAndValue(CompareOperator.Lte, value);
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.Between"/> and
/// <see cref="DynamicColumn.Value"/> to provided values.</summary>
/// <param name="from">Value of from parameter to set.</param>
/// <param name="to">Value of to parameter to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn Between(object from, object to)
{
return SetOperatorAndValue(CompareOperator.Between, new[] { from, to });
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.In"/> and
/// <see cref="DynamicColumn.Value"/> to provided values.</summary>
/// <param name="values">Values of parameters to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn In(IEnumerable<object> values)
{
return SetOperatorAndValue(CompareOperator.In, values);
}
/// <summary>Helper method setting <see cref="DynamicColumn.Operator"/>
/// to <see cref="CompareOperator.In"/> and
/// <see cref="DynamicColumn.Value"/> to provided values.</summary>
/// <param name="values">Values of parameters to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn In(params object[] values)
{
if (values.Length == 1 && (values[0].GetType().IsCollection() || values[0] is IEnumerable<object>))
return SetOperatorAndValue(CompareOperator.In, values[0]);
return SetOperatorAndValue(CompareOperator.In, values);
}
#endregion Operators
#region Order
/// <summary>Helper method setting <see cref="DynamicColumn.Order"/>
/// to <see cref="SortOrder.Asc"/>..</summary>
/// <returns>Returns self.</returns>
public DynamicColumn Asc()
{
Order = SortOrder.Asc;
return this;
}
/// <summary>Helper method setting <see cref="DynamicColumn.Order"/>
/// to <see cref="SortOrder.Desc"/>..</summary>
/// <returns>Returns self.</returns>
public DynamicColumn Desc()
{
Order = SortOrder.Desc;
return this;
}
#endregion Order
#region Other
/// <summary>Helper method setting
/// <see cref="DynamicColumn.ColumnName"/>
/// to provided <c>name</c>.</summary>
/// <param name="name">Name to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn SetName(string name)
{
ColumnName = name;
return this;
}
/// <summary>Helper method setting
/// <see cref="DynamicColumn.Alias"/>
/// to provided <c>alias</c>.</summary>
/// <param name="alias">Alias to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn SetAlias(string alias)
{
Alias = alias;
return this;
}
/// <summary>Helper method setting
/// <see cref="DynamicColumn.Aggregate"/>
/// to provided <c>aggregate</c>.</summary>
/// <param name="aggregate">Aggregate to set.</param>
/// <returns>Returns self.</returns>
public DynamicColumn SetAggregate(string aggregate)
{
Aggregate = aggregate;
return this;
}
/// <summary>Sets the begin block flag.</summary>
/// <param name="begin">If set to <c>true</c> [begin].</param>
/// <returns>Returns self.</returns>
public DynamicColumn SetBeginBlock(bool begin = true)
{
BeginBlock = begin;
return this;
}
/// <summary>Sets the end block flag.</summary>
/// <param name="end">If set to <c>true</c> [end].</param>
/// <returns>Returns self.</returns>
public DynamicColumn SetEndBlock(bool end = true)
{
EndBlock = end;
return this;
}
/// <summary>Sets the or flag.</summary>
/// <param name="or">If set to <c>true</c> [or].</param>
/// <returns>Returns self.</returns>
public DynamicColumn SetOr(bool or = true)
{
Or = or;
return this;
}
/// <summary>Sets the virtual column.</summary>
/// <param name="virt">Set virtual column value.</param>
/// <returns>Returns self.</returns>
public DynamicColumn SetVirtualColumn(bool? virt)
{
VirtualColumn = virt;
return this;
}
#endregion Other
#endregion Query creation helpers
#region Parsing
/// <summary>Parse column for select query.</summary>
/// <remarks>Column format consist of <c>Column Name</c>, <c>Alias</c> and
/// <c>Aggregate function</c> in this order separated by '<c>:</c>'.</remarks>
/// <param name="column">Column string.</param>
/// <returns>Instance of <see cref="DynamicColumn"/>.</returns>
public static DynamicColumn ParseSelectColumn(string column)
{
// Split column description
var parts = column.Split(':');
if (parts.Length > 0)
{
DynamicColumn ret = new DynamicColumn() { ColumnName = parts[0] };
if (parts.Length > 1)
ret.Alias = parts[1];
if (parts.Length > 2)
ret.Aggregate = parts[2];
return ret;
}
return null;
}
/// <summary>Parse column for order by in query.</summary>
/// <remarks>Column format consist of <c>Column Name</c> and
/// <c>Direction</c> in this order separated by '<c>:</c>'.</remarks>
/// <param name="column">Column string.</param>
/// <returns>Instance of <see cref="DynamicColumn"/>.</returns>
public static DynamicColumn ParseOrderByColumn(string column)
{
// Split column description
var parts = column.Split(':');
if (parts.Length > 0)
{
DynamicColumn ret = new DynamicColumn() { ColumnName = parts[0] };
if (parts.Length > 1)
ret.Order = parts[1].ToLower() == "d" || parts[1].ToLower() == "desc" ? SortOrder.Desc : SortOrder.Asc;
if (parts.Length > 2)
ret.Alias = parts[2];
return ret;
}
return null;
}
#endregion Parsing
#region ToSQL
internal string ToSQLSelectColumn(DynamicDatabase db)
{
StringBuilder sb = new StringBuilder();
ToSQLSelectColumn(db, sb);
return sb.ToString();
}
internal void ToSQLSelectColumn(DynamicDatabase db, StringBuilder sb)
{
string column = ColumnName == "*" ? "*" : ColumnName;
if (column != "*" &&
(column.IndexOf(db.LeftDecorator) == -1 || column.IndexOf(db.RightDecorator) == -1) &&
(column.IndexOf('(') == -1 || column.IndexOf(')') == -1))
column = db.DecorateName(column);
string alias = Alias;
if (!string.IsNullOrEmpty(Aggregate))
{
sb.AppendFormat("{0}({1})", Aggregate, column);
alias = string.IsNullOrEmpty(alias) ?
ColumnName == "*" ? Guid.NewGuid().ToString() : ColumnName :
alias;
}
else
sb.Append(column);
if (!string.IsNullOrEmpty(alias))
sb.AppendFormat(" AS {0}", alias);
}
internal string ToSQLGroupByColumn(DynamicDatabase db)
{
StringBuilder sb = new StringBuilder();
ToSQLGroupByColumn(db, sb);
return sb.ToString();
}
internal void ToSQLGroupByColumn(DynamicDatabase db, StringBuilder sb)
{
sb.Append(db.DecorateName(ColumnName));
}
internal string ToSQLOrderByColumn(DynamicDatabase db)
{
StringBuilder sb = new StringBuilder();
ToSQLOrderByColumn(db, sb);
return sb.ToString();
}
internal void ToSQLOrderByColumn(DynamicDatabase db, StringBuilder sb)
{
if (!string.IsNullOrEmpty(Alias))
sb.Append(Alias);
else
sb.Append(db.DecorateName(ColumnName));
sb.AppendFormat(" {0}", Order.ToString().ToUpper());
}
#endregion ToSQL
}
/// <summary>Helper class to easy manage command.</summary>
public class DynamicCommand : IDbCommand, IExtendedDisposable
{
private IDbCommand _command;
private int? _commandTimeout = null;
private DynamicConnection _con;
private DynamicDatabase _db;
////private long _poolStamp = 0;
/// <summary>Initializes a new instance of the <see cref="DynamicCommand"/> class.</summary>
/// <param name="con">The connection.</param>
/// <param name="db">The database manager.</param>
internal DynamicCommand(DynamicConnection con, DynamicDatabase db)
{
IsDisposed = false;
_con = con;
_db = db;
lock (_db.SyncLock)
{
if (!_db.CommandsPool.ContainsKey(_con.Connection))
throw new InvalidOperationException("Can't create command using disposed connection.");
else
{
_command = _con.Connection.CreateCommand();
_db.CommandsPool[_con.Connection].Add(this);
}
}
}
/// <summary>Initializes a new instance of the <see cref="DynamicCommand"/> class.</summary>
/// <param name="db">The database manager.</param>
/// <remarks>Used internally to create command without context.</remarks>
internal DynamicCommand(DynamicDatabase db)
{
IsDisposed = false;
_db = db;
_command = db.Provider.CreateCommand();
}
/// <summary>Prepare command for execution.</summary>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
internal IDbCommand PrepareForExecution()
{
// TODO: Fix that
////if (_poolStamp < _db.PoolStamp)
{
_command.CommandTimeout = _commandTimeout ?? _db.CommandTimeout ?? _command.CommandTimeout;
if (_db.TransactionPool[_command.Connection].Count > 0)
_command.Transaction = _db.TransactionPool[_command.Connection].Peek();
else
_command.Transaction = null;
////_poolStamp = _db.PoolStamp;
}
return _db.DumpCommands ? _command.Dump(Console.Out) : _command;
}
#region IDbCommand Members
/// <summary>
/// Attempts to cancels the execution of an <see cref="T:System.Data.IDbCommand"/>.
/// </summary>
public void Cancel()
{
_command.Cancel();
}
/// <summary>
/// Gets or sets the text command to run against the data source.
/// </summary>
/// <returns>The text command to execute. The default value is an empty string ("").</returns>
public string CommandText { get { return _command.CommandText; } set { _command.CommandText = value; } }
/// <summary>
/// Gets or sets the wait time before terminating the attempt to execute a command and generating an error.
/// </summary>
/// <returns>The time (in seconds) to wait for the command to execute. The default value is 30 seconds.</returns>
/// <exception cref="T:System.ArgumentException">The property value assigned is less than 0. </exception>
public int CommandTimeout { get { return _commandTimeout ?? _command.CommandTimeout; } set { _commandTimeout = value; } }
/// <summary>Gets or sets how the <see cref="P:System.Data.IDbCommand.CommandText"/> property is interpreted.</summary>
public CommandType CommandType { get { return _command.CommandType; } set { _command.CommandType = value; } }
/// <summary>Gets or sets the <see cref="T:System.Data.IDbConnection"/>
/// used by this instance of the <see cref="T:System.Data.IDbCommand"/>.</summary>
/// <returns>The connection to the data source.</returns>
public IDbConnection Connection
{
get { return _con; }
set
{
_con = value as DynamicConnection;
if (_con != null)
{
////_poolStamp = 0;
_command.Connection = _con.Connection;
}
else if (value == null)
{
_command.Transaction = null;
_command.Connection = null;
}
else
throw new InvalidOperationException("Can't assign direct IDbConnection implementation. This property accepts only DynamORM implementation of IDbConnection.");
}
}
/// <summary>Creates a new instance of an
/// <see cref="T:System.Data.IDbDataParameter"/> object.</summary>
/// <returns>An <see cref="IDbDataParameter"/> object.</returns>
public IDbDataParameter CreateParameter()
{
return _command.CreateParameter();
}
/// <summary>Executes an SQL statement against the Connection object of a
/// data provider, and returns the number of rows affected.</summary>
/// <returns>The number of rows affected.</returns>
public int ExecuteNonQuery()
{
try
{
return PrepareForExecution().ExecuteNonQuery();
}
catch (Exception ex)
{
throw new DynamicQueryException(ex, this);
}
}
/// <summary>Executes the <see cref="P:System.Data.IDbCommand.CommandText"/>
/// against the <see cref="P:System.Data.IDbCommand.Connection"/>,
/// and builds an <see cref="T:System.Data.IDataReader"/> using one
/// of the <see cref="T:System.Data.CommandBehavior"/> values.
/// </summary><param name="behavior">One of the
/// <see cref="T:System.Data.CommandBehavior"/> values.</param>
/// <returns>An <see cref="T:System.Data.IDataReader"/> object.</returns>
public IDataReader ExecuteReader(CommandBehavior behavior)
{
try
{
return PrepareForExecution().ExecuteReader(behavior);
}
catch (Exception ex)
{
throw new DynamicQueryException(ex, this);
}
}
/// <summary>Executes the <see cref="P:System.Data.IDbCommand.CommandText"/>
/// against the <see cref="P:System.Data.IDbCommand.Connection"/> and
/// builds an <see cref="T:System.Data.IDataReader"/>.</summary>
/// <returns>An <see cref="T:System.Data.IDataReader"/> object.</returns>
public IDataReader ExecuteReader()
{
try
{
return PrepareForExecution().ExecuteReader();
}
catch (Exception ex)
{
throw new DynamicQueryException(ex, this);
}
}
/// <summary>Executes the query, and returns the first column of the
/// first row in the result set returned by the query. Extra columns or
/// rows are ignored.</summary>
/// <returns>The first column of the first row in the result set.</returns>
public object ExecuteScalar()
{
try
{
return PrepareForExecution().ExecuteScalar();
}
catch (Exception ex)
{
throw new DynamicQueryException(ex, this);
}
}
/// <summary>Gets the <see cref="T:System.Data.IDataParameterCollection"/>.</summary>
public IDataParameterCollection Parameters
{
get { return _command.Parameters; }
}
/// <summary>Creates a prepared (or compiled) version of the command on the data source.</summary>
public void Prepare()
{
try
{
_command.Prepare();
}
catch (Exception ex)
{
throw new DynamicQueryException("Error preparing command.", ex, this);
}
}
/// <summary>Gets or sets the transaction within which the Command
/// object of a data provider executes.</summary>
/// <remarks>It's does nothing, transaction is peeked from transaction
/// pool of a connection. This is only a dummy.</remarks>
public IDbTransaction Transaction { get { return null; } set { } }
/// <summary>Gets or sets how command results are applied to the <see cref="T:System.Data.DataRow"/>
/// when used by the <see cref="M:System.Data.IDataAdapter.Update(System.Data.DataSet)"/>
/// method of a <see cref="T:System.Data.Common.DbDataAdapter"/>.</summary>
/// <returns>One of the <see cref="T:System.Data.UpdateRowSource"/> values. The default is
/// Both unless the command is automatically generated. Then the default is None.</returns>
/// <exception cref="T:System.ArgumentException">The value entered was not one of the
/// <see cref="T:System.Data.UpdateRowSource"/> values. </exception>
public UpdateRowSource UpdatedRowSource { get { return _command.UpdatedRowSource; } set { _command.UpdatedRowSource = value; } }
#endregion IDbCommand Members
#region IExtendedDisposable Members
/// <summary>Performs application-defined tasks associated with
/// freeing, releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
lock (_db.SyncLock)
{
if (_con != null)
{
var pool = _db.CommandsPool.TryGetValue(_con.Connection);
if (pool != null && pool.Contains(this))
pool.Remove(this);
}
IsDisposed = true;
_command.Dispose();
}
}
/// <summary>Gets a value indicating whether this instance is disposed.</summary>
public bool IsDisposed { get; private set; }
#endregion IExtendedDisposable Members
}
/// <summary>Connection wrapper.</summary>
/// <remarks>This class is only connection holder, connection is managed by
/// <see cref="DynamicDatabase"/> instance.</remarks>
public class DynamicConnection : IDbConnection, IExtendedDisposable
{
private DynamicDatabase _db;
private bool _singleTransaction;
/// <summary>Gets underlying connection.</summary>
internal IDbConnection Connection { get; private set; }
/// <summary>Initializes a new instance of the <see cref="DynamicConnection" /> class.</summary>
/// <param name="db">Database connection manager.</param>
/// <param name="con">Active connection.</param>
/// <param name="singleTransaction">Are we using single transaction mode? I so... act correctly.</param>
internal DynamicConnection(DynamicDatabase db, IDbConnection con, bool singleTransaction)
{
IsDisposed = false;
_db = db;
Connection = con;
_singleTransaction = singleTransaction;
}
/// <summary>Begins a database transaction.</summary>
/// <param name="il">One of the <see cref="System.Data.IsolationLevel"/> values.</param>
/// <param name="disposed">This action is invoked when transaction is disposed.</param>
/// <returns>Returns <see cref="DynamicTransaction"/> representation.</returns>
internal DynamicTransaction BeginTransaction(IsolationLevel? il, Action disposed)
{
return new DynamicTransaction(_db, this, _singleTransaction, il, disposed);
}
#region IDbConnection Members
/// <summary>Creates and returns a Command object associated with the connection.</summary>
/// <returns>A Command object associated with the connection.</returns>
public IDbCommand CreateCommand()
{
return new DynamicCommand(this, _db);
}
/// <summary>Begins a database transaction.</summary>
/// <returns>Returns <see cref="DynamicTransaction"/> representation.</returns>
public IDbTransaction BeginTransaction()
{
return BeginTransaction(null, null);
}
/// <summary>Begins a database transaction with the specified
/// <see cref="System.Data.IsolationLevel"/> value.</summary>
/// <param name="il">One of the <see cref="System.Data.IsolationLevel"/> values.</param>
/// <returns>Returns <see cref="DynamicTransaction"/> representation.</returns>
public IDbTransaction BeginTransaction(IsolationLevel il)
{
return BeginTransaction(il, null);
}
/// <summary>Changes the current database for an open Connection object.</summary>
/// <param name="databaseName">The name of the database to use in place of the current database.</param>
/// <remarks>This operation is not supported in <c>DynamORM</c>. and will throw <see cref="NotSupportedException"/>.</remarks>
/// <exception cref="NotSupportedException">Thrown always.</exception>
public void ChangeDatabase(string databaseName)
{
throw new NotSupportedException("This operation is not supported in DynamORM.");
}
/// <summary>Opens a database connection with the settings specified by
/// the ConnectionString property of the provider-specific
/// Connection object.</summary>
/// <remarks>Does nothing. <see cref="DynamicDatabase"/> handles
/// opening connections.</remarks>
public void Open()
{
}
/// <summary>Closes the connection to the database.</summary>
/// <remarks>Does nothing. <see cref="DynamicDatabase"/> handles
/// closing connections. Only way to close it is to dispose connection.
/// It will close if this is multi connection configuration, otherwise
/// it will stay open until <see cref="DynamicDatabase"/> is not
/// disposed.</remarks>
public void Close()
{
}
/// <summary>Gets or sets the string used to open a database.</summary>
/// <remarks>Changing connection string operation is not supported in <c>DynamORM</c>.
/// and will throw <see cref="NotSupportedException"/>.</remarks>
/// <exception cref="NotSupportedException">Thrown always when set is attempted.</exception>
public string ConnectionString
{
get { return Connection.ConnectionString; }
set { throw new NotSupportedException("This operation is not supported in DynamORM."); }
}
/// <summary>Gets the time to wait while trying to establish a connection
/// before terminating the attempt and generating an error.</summary>
public int ConnectionTimeout
{
get { return Connection.ConnectionTimeout; }
}
/// <summary>Gets the name of the current database or the database
/// to be used after a connection is opened.</summary>
public string Database
{
get { throw new NotImplementedException(); }
}
/// <summary>Gets the current state of the connection.</summary>
public ConnectionState State
{
get { return Connection.State; }
}
#endregion IDbConnection Members
#region IExtendedDisposable Members
/// <summary>Performs application-defined tasks associated with freeing,
/// releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
_db.Close(Connection);
IsDisposed = true;
}
/// <summary>Gets a value indicating whether this instance is disposed.</summary>
public bool IsDisposed { get; private set; }
#endregion IExtendedDisposable Members
}
/// <summary>Dynamic database is a class responsible for managing database.</summary>
public class DynamicDatabase : IExtendedDisposable
{
#region Internal fields and properties
private DbProviderFactory _provider;
private string _connectionString;
private bool _singleConnection;
private bool _singleTransaction;
private string _leftDecorator = "\"";
private string _rightDecorator = "\"";
private bool _leftDecoratorIsInInvalidMembersChars = true;
private bool _rightDecoratorIsInInvalidMembersChars = true;
private string _parameterFormat = "@{0}";
private int? _commandTimeout = null;
private long _poolStamp = 0;
private DynamicConnection _tempConn = null;
/// <summary>Provides lock object for this database instance.</summary>
internal readonly object SyncLock = new object();
/// <summary>Gets or sets timestamp of last transaction pool or configuration change.</summary>
/// <remarks>This property is used to allow commands to determine if
/// they need to update transaction object or not.</remarks>
internal long PoolStamp
{
get
{
long r = 0;
lock (SyncLock)
r = _poolStamp;
return r;
}
set
{
lock (SyncLock)
_poolStamp = value;
}
}
/// <summary>Gets pool of connections and transactions.</summary>
internal Dictionary<IDbConnection, Stack<IDbTransaction>> TransactionPool { get; private set; }
/// <summary>Gets pool of connections and commands.</summary>
/// <remarks>Pool should contain dynamic commands instead of native ones.</remarks>
internal Dictionary<IDbConnection, List<IDbCommand>> CommandsPool { get; private set; }
/// <summary>Gets schema columns cache.</summary>
internal Dictionary<string, Dictionary<string, DynamicSchemaColumn>> Schema { get; private set; }
#if !DYNAMORM_OMMIT_OLDSYNTAX
/// <summary>Gets tables cache for this database instance.</summary>
internal Dictionary<string, DynamicTable> TablesCache { get; private set; }
#endif
#endregion Internal fields and properties
#region Properties and Constructors
/// <summary>Gets database options.</summary>
public DynamicDatabaseOptions Options { get; private set; }
/// <summary>Gets or sets command timeout.</summary>
public int? CommandTimeout { get { return _commandTimeout; } set { _commandTimeout = value; _poolStamp = DateTime.Now.Ticks; } }
/// <summary>Gets the database provider.</summary>
public DbProviderFactory Provider { get { return _provider; } }
/// <summary>Gets or sets a value indicating whether
/// dump commands to console or not.</summary>
public bool DumpCommands { get; set; }
/// <summary>Initializes a new instance of the <see cref="DynamicDatabase" /> class.</summary>
/// <param name="provider">Database provider by name.</param>
/// <param name="connectionString">Connection string to provided database.</param>
/// <param name="options">Connection options.</param>
public DynamicDatabase(string provider, string connectionString, DynamicDatabaseOptions options)
: this(DbProviderFactories.GetFactory(provider), connectionString, options)
{
}
/// <summary>Initializes a new instance of the <see cref="DynamicDatabase" /> class.</summary>
/// <param name="provider">Database provider.</param>
/// <param name="connectionString">Connection string to provided database.</param>
/// <param name="options">Connection options.</param>
public DynamicDatabase(DbProviderFactory provider, string connectionString, DynamicDatabaseOptions options)
{
IsDisposed = false;
_provider = provider;
InitCommon(connectionString, options);
}
/// <summary>Initializes a new instance of the <see cref="DynamicDatabase" /> class.</summary>
/// <param name="connection">Active database connection.</param>
/// <param name="options">Connection options. <see cref="DynamicDatabaseOptions.SingleConnection"/> required.</param>
public DynamicDatabase(IDbConnection connection, DynamicDatabaseOptions options)
{
IsDisposed = false;
InitCommon(connection.ConnectionString, options);
TransactionPool.Add(connection, new Stack<IDbTransaction>());
if (!_singleConnection)
throw new InvalidOperationException("This constructor accepts only connections with DynamicDatabaseOptions.SingleConnection option.");
}
private void InitCommon(string connectionString, DynamicDatabaseOptions options)
{
_connectionString = connectionString;
Options = options;
_singleConnection = (options & DynamicDatabaseOptions.SingleConnection) == DynamicDatabaseOptions.SingleConnection;
_singleTransaction = (options & DynamicDatabaseOptions.SingleTransaction) == DynamicDatabaseOptions.SingleTransaction;
DumpCommands = (options & DynamicDatabaseOptions.DumpCommands) == DynamicDatabaseOptions.DumpCommands;
TransactionPool = new Dictionary<IDbConnection, Stack<IDbTransaction>>();
CommandsPool = new Dictionary<IDbConnection, List<IDbCommand>>();
Schema = new Dictionary<string, Dictionary<string, DynamicSchemaColumn>>();
#if !DYNAMORM_OMMIT_OLDSYNTAX
TablesCache = new Dictionary<string, DynamicTable>();
#endif
}
#endregion Properties and Constructors
#region Table
#if !DYNAMORM_OMMIT_OLDSYNTAX
/// <summary>Gets dynamic table which is a simple ORM using dynamic objects.</summary>
/// <param name="action">The action with instance of <see cref="DynamicTable"/> as parameter.</param>
/// <param name="table">Table name.</param>
/// <param name="keys">Override keys in schema.</param>
/// <param name="owner">Owner of the table.</param>
public void Table(Action<dynamic> action, string table = "", string[] keys = null, string owner = "")
{
using (dynamic t = Table(table, keys, owner))
action(t);
}
/// <summary>Gets dynamic table which is a simple ORM using dynamic objects.</summary>
/// <typeparam name="T">Type used to determine table name.</typeparam>
/// <param name="action">The action with instance of <see cref="DynamicTable"/> as parameter.</param>
/// <param name="keys">Override keys in schema.</param>
public void Table<T>(Action<dynamic> action, string[] keys = null)
{
using (dynamic t = Table<T>(keys))
action(t);
}
/// <summary>Gets dynamic table which is a simple ORM using dynamic objects.</summary>
/// <param name="table">Table name.</param>
/// <param name="keys">Override keys in schema.</param>
/// <param name="owner">Owner of the table.</param>
/// <returns>Instance of <see cref="DynamicTable"/>.</returns>
public dynamic Table(string table = "", string[] keys = null, string owner = "")
{
string key = string.Concat(
table == null ? string.Empty : table,
keys == null ? string.Empty : string.Join("_|_", keys));
DynamicTable dt = null;
lock (SyncLock)
dt = TablesCache.TryGetValue(key) ??
TablesCache.AddAndPassValue(key,
new DynamicTable(this, table, owner, keys));
return dt;
}
/// <summary>Gets dynamic table which is a simple ORM using dynamic objects.</summary>
/// <typeparam name="T">Type used to determine table name.</typeparam>
/// <param name="keys">Override keys in schema.</param>
/// <returns>Instance of <see cref="DynamicTable"/>.</returns>
public dynamic Table<T>(string[] keys = null)
{
Type table = typeof(T);
string key = string.Concat(
table.FullName,
keys == null ? string.Empty : string.Join("_|_", keys));
DynamicTable dt = null;
lock (SyncLock)
dt = TablesCache.TryGetValue(key) ??
TablesCache.AddAndPassValue(key,
new DynamicTable(this, table, keys));
return dt;
}
/// <summary>Removes cached table.</summary>
/// <param name="dynamicTable">Disposed dynamic table.</param>
internal void RemoveFromCache(DynamicTable dynamicTable)
{
foreach (var item in TablesCache.Where(kvp => kvp.Value == dynamicTable).ToList())
TablesCache.Remove(item.Key);
}
#endif
#endregion Table
#region From/Insert/Update/Delete
/// <summary>
/// Adds to the <code>FROM</code> clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: <code>x => "owner.Table AS Alias"</code>, where the alias part is optional.</para>
/// <para>- Resolve to an expression: <code>x => x.owner.Table.As( x.Alias )</code>, where the alias part is optional.</para>
/// <para>- Generic expression: <code>x => x( expression ).As( x.Alias )</code>, where the alias part is mandatory. In this
/// case the alias is not annotated.</para>
/// </summary>
/// <param name="fn">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicSelectQueryBuilder From(Func<dynamic, object> fn)
{
return new DynamicSelectQueryBuilder(this).From(fn);
}
/// <summary>Adds to the <code>FROM</code> clause using <see cref="Type"/>.</summary>
/// <typeparam name="T">Type which can be represented in database.</typeparam>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicSelectQueryBuilder From<T>()
{
return new DynamicSelectQueryBuilder(this).From(x => x(typeof(T)));
}
/// <summary>Adds to the <code>FROM</code> clause using <see cref="Type"/>.</summary>
/// <param name="t">Type which can be represented in database.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicSelectQueryBuilder From(Type t)
{
return new DynamicSelectQueryBuilder(this).From(x => x(t));
}
/// <summary>
/// Adds to the <code>INSERT INTO</code> clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: <code>x => "owner.Table"</code>.</para>
/// <para>- Resolve to a type: <code>x => typeof(SomeClass)</code>.</para>
/// <para>- Resolve to an expression: <code>x => x.owner.Table</code>.</para>
/// <para>- Generic expression: <code>x => x( expression )</code>. Expression can
/// be <see cref="string"/> or <see cref="Type"/>.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicInsertQueryBuilder Insert(Func<dynamic, object> func)
{
return new DynamicInsertQueryBuilder(this).Table(func);
}
/// <summary>Adds to the <code>INSERT INTO</code> clause using <see cref="Type"/>.</summary>
/// <typeparam name="T">Type which can be represented in database.</typeparam>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicInsertQueryBuilder Insert<T>()
{
return new DynamicInsertQueryBuilder(this).Table(typeof(T));
}
/// <summary>Adds to the <code>INSERT INTO</code> clause using <see cref="Type"/>.</summary>
/// <param name="t">Type which can be represented in database.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicInsertQueryBuilder Insert(Type t)
{
return new DynamicInsertQueryBuilder(this).Table(t);
}
/// <summary>Bulk insert objects into database.</summary>
/// <typeparam name="T">Type of objects to insert.</typeparam>
/// <param name="e">Enumerable containing instances of objects to insert.</param>
/// <returns>Number of inserted rows.</returns>
public virtual int Insert<T>(IEnumerable<T> e) where T : class
{
int affected = 0;
var mapper = DynamicMapperCache.GetMapper(typeof(T));
if (mapper != null)
{
using (var con = Open())
using (var tra = con.BeginTransaction())
using (var cmd = con.CreateCommand())
{
try
{
var parameters = new Dictionary<IDbDataParameter, DynamicPropertyInvoker>();
if (!string.IsNullOrEmpty(mapper.InsertCommandText))
{
cmd.CommandText = mapper.InsertCommandText;
foreach (var col in mapper.ColumnsMap.Values
.Where(di => !di.Ignore && di.InsertCommandParameter != null)
.OrderBy(di => di.InsertCommandParameter.Ordinal))
{
var para = cmd.CreateParameter();
para.ParameterName = col.InsertCommandParameter.Name;
para.DbType = col.InsertCommandParameter.Type;
cmd.Parameters.Add(para);
parameters[para] = col;
}
}
else
PrepareBatchInsert<T>(mapper, cmd, parameters);
foreach (var o in e)
{
foreach (var m in parameters)
m.Key.Value = m.Value.Get(o);
affected += cmd.ExecuteNonQuery();
}
tra.Commit();
}
catch (Exception ex)
{
if (tra != null)
tra.Rollback();
affected = 0;
var problematicCommand = new StringBuilder();
cmd.Dump(problematicCommand);
throw new InvalidOperationException(problematicCommand.ToString(), ex);
}
}
}
return affected;
}
/// <summary>
/// Adds to the <code>UPDATE</code> clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: <code>x => "owner.Table"</code>.</para>
/// <para>- Resolve to a type: <code>x => typeof(SomeClass)</code>.</para>
/// <para>- Resolve to an expression: <code>x => x.owner.Table</code>.</para>
/// <para>- Generic expression: <code>x => x( expression )</code>. Expression can
/// be <see cref="string"/> or <see cref="Type"/>.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicUpdateQueryBuilder Update(Func<dynamic, object> func)
{
return new DynamicUpdateQueryBuilder(this).Table(func);
}
/// <summary>Adds to the <code>UPDATE</code> clause using <see cref="Type"/>.</summary>
/// <typeparam name="T">Type which can be represented in database.</typeparam>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicUpdateQueryBuilder Update<T>()
{
return new DynamicUpdateQueryBuilder(this).Table(typeof(T));
}
/// <summary>Adds to the <code>UPDATE</code> clause using <see cref="Type"/>.</summary>
/// <param name="t">Type which can be represented in database.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicUpdateQueryBuilder Update(Type t)
{
return new DynamicUpdateQueryBuilder(this).Table(t);
}
/// <summary>Bulk update objects in database.</summary>
/// <typeparam name="T">Type of objects to update.</typeparam>
/// <param name="e">Enumerable containing instances of objects to update.</param>
/// <returns>Number of updated rows.</returns>
public virtual int Update<T>(IEnumerable<T> e) where T : class
{
int affected = 0;
var mapper = DynamicMapperCache.GetMapper(typeof(T));
if (mapper != null)
{
using (var con = Open())
using (var tra = con.BeginTransaction())
using (var cmd = con.CreateCommand())
{
try
{
var parameters = new Dictionary<IDbDataParameter, DynamicPropertyInvoker>();
if (!string.IsNullOrEmpty(mapper.UpdateCommandText))
{
cmd.CommandText = mapper.UpdateCommandText;
foreach (var col in mapper.ColumnsMap.Values
.Where(di => !di.Ignore && di.UpdateCommandParameter != null)
.OrderBy(di => di.UpdateCommandParameter.Ordinal))
{
var para = cmd.CreateParameter();
para.ParameterName = col.UpdateCommandParameter.Name;
para.DbType = col.UpdateCommandParameter.Type;
cmd.Parameters.Add(para);
parameters[para] = col;
}
}
else
PrepareBatchUpdate<T>(mapper, cmd, parameters);
foreach (var o in e)
{
foreach (var m in parameters)
m.Key.Value = m.Value.Get(o);
affected += cmd.ExecuteNonQuery();
}
tra.Commit();
}
catch (Exception ex)
{
if (tra != null)
tra.Rollback();
affected = 0;
var problematicCommand = new StringBuilder();
cmd.Dump(problematicCommand);
throw new InvalidOperationException(problematicCommand.ToString(), ex);
}
}
}
return affected;
}
/// <summary>Bulk update or insert objects into database.</summary>
/// <typeparam name="T">Type of objects to update or insert.</typeparam>
/// <param name="e">Enumerable containing instances of objects to update or insert.</param>
/// <returns>Number of updated or inserted rows.</returns>
public virtual int UpdateOrInsert<T>(IEnumerable<T> e) where T : class
{
int affected = 0;
var mapper = DynamicMapperCache.GetMapper(typeof(T));
if (mapper != null)
{
using (var con = Open())
using (var tra = con.BeginTransaction())
using (var cmdUp = con.CreateCommand())
using (var cmdIn = con.CreateCommand())
{
try
{
#region Update
var parametersUp = new Dictionary<IDbDataParameter, DynamicPropertyInvoker>();
if (!string.IsNullOrEmpty(mapper.UpdateCommandText))
{
cmdUp.CommandText = mapper.UpdateCommandText;
foreach (var col in mapper.ColumnsMap.Values
.Where(di => !di.Ignore && di.UpdateCommandParameter != null)
.OrderBy(di => di.UpdateCommandParameter.Ordinal))
{
var para = cmdUp.CreateParameter();
para.ParameterName = col.UpdateCommandParameter.Name;
para.DbType = col.UpdateCommandParameter.Type;
cmdUp.Parameters.Add(para);
parametersUp[para] = col;
}
}
else
PrepareBatchUpdate<T>(mapper, cmdUp, parametersUp);
#endregion Update
#region Insert
var parametersIn = new Dictionary<IDbDataParameter, DynamicPropertyInvoker>();
if (!string.IsNullOrEmpty(mapper.InsertCommandText))
{
cmdIn.CommandText = mapper.InsertCommandText;
foreach (var col in mapper.ColumnsMap.Values
.Where(di => !di.Ignore && di.InsertCommandParameter != null)
.OrderBy(di => di.InsertCommandParameter.Ordinal))
{
var para = cmdIn.CreateParameter();
para.ParameterName = col.InsertCommandParameter.Name;
para.DbType = col.InsertCommandParameter.Type;
cmdIn.Parameters.Add(para);
parametersIn[para] = col;
}
}
else
PrepareBatchInsert<T>(mapper, cmdIn, parametersIn);
#endregion Insert
foreach (var o in e)
{
foreach (var m in parametersUp)
m.Key.Value = m.Value.Get(o);
int a = cmdUp.ExecuteNonQuery();
if (a == 0)
{
foreach (var m in parametersIn)
m.Key.Value = m.Value.Get(o);
a = cmdIn.ExecuteNonQuery();
}
affected += a;
}
tra.Commit();
}
catch (Exception ex)
{
if (tra != null)
tra.Rollback();
affected = 0;
var problematicCommand = new StringBuilder();
cmdUp.Dump(problematicCommand);
throw new InvalidOperationException(problematicCommand.ToString(), ex);
}
}
}
return affected;
}
/// <summary>
/// Adds to the <code>DELETE FROM</code> clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: <code>x => "owner.Table"</code>.</para>
/// <para>- Resolve to a type: <code>x => typeof(SomeClass)</code>.</para>
/// <para>- Resolve to an expression: <code>x => x.owner.Table</code>.</para>
/// <para>- Generic expression: <code>x => x( expression )</code>. Expression can
/// be <see cref="string"/> or <see cref="Type"/>.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicDeleteQueryBuilder Delete(Func<dynamic, object> func)
{
return new DynamicDeleteQueryBuilder(this).Table(func);
}
/// <summary>Adds to the <code>DELETE FROM</code> clause using <see cref="Type"/>.</summary>
/// <typeparam name="T">Type which can be represented in database.</typeparam>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicDeleteQueryBuilder Delete<T>()
{
return new DynamicDeleteQueryBuilder(this).Table(typeof(T));
}
/// <summary>Bulk delete objects in database.</summary>
/// <typeparam name="T">Type of objects to delete.</typeparam>
/// <param name="e">Enumerable containing instances of objects to delete.</param>
/// <returns>Number of deleted rows.</returns>
public virtual int Delete<T>(IEnumerable<T> e) where T : class
{
int affected = 0;
var mapper = DynamicMapperCache.GetMapper(typeof(T));
if (mapper != null)
{
using (var con = Open())
using (var tra = con.BeginTransaction())
using (var cmd = con.CreateCommand())
{
try
{
var parameters = new Dictionary<IDbDataParameter, DynamicPropertyInvoker>();
if (!string.IsNullOrEmpty(mapper.DeleteCommandText))
{
cmd.CommandText = mapper.DeleteCommandText;
foreach (var col in mapper.ColumnsMap.Values
.Where(di => !di.Ignore && di.DeleteCommandParameter != null)
.OrderBy(di => di.DeleteCommandParameter.Ordinal))
{
var para = cmd.CreateParameter();
para.ParameterName = col.DeleteCommandParameter.Name;
para.DbType = col.DeleteCommandParameter.Type;
cmd.Parameters.Add(para);
parameters[para] = col;
}
}
else
PrepareBatchDelete<T>(mapper, cmd, parameters);
foreach (var o in e)
{
foreach (var m in parameters)
m.Key.Value = m.Value.Get(o);
affected += cmd.ExecuteNonQuery();
}
tra.Commit();
}
catch (Exception ex)
{
if (tra != null)
tra.Rollback();
affected = 0;
var problematicCommand = new StringBuilder();
cmd.Dump(problematicCommand);
throw new InvalidOperationException(problematicCommand.ToString(), ex);
}
}
}
return affected;
}
private void PrepareBatchInsert<T>(DynamicTypeMap mapper, IDbCommand cmd, Dictionary<IDbDataParameter, DynamicPropertyInvoker> parameters)
{
DynamicPropertyInvoker currentprop = null;
var temp = new Dictionary<string, DynamicPropertyInvoker>();
var schema = this.GetSchema<T>();
int ord = 0;
var ib = Insert<T>()
.SetVirtualMode(true)
.CreateTemporaryParameterAction(p => temp[p.Name] = currentprop)
.CreateParameterAction((p, cp) =>
{
parameters[cp] = temp[p.Name];
parameters[cp].InsertCommandParameter = new DynamicPropertyInvoker.ParameterSpec
{
Name = cp.ParameterName,
Type = cp.DbType,
Ordinal = ord++,
};
});
foreach (var prop in mapper.PropertyMap)
if (!mapper.Ignored.Contains(prop.Key))
{
var col = mapper.PropertyMap.TryGetValue(prop.Key) ?? prop.Key;
currentprop = mapper.ColumnsMap.TryGetValue(col.ToLower());
if (currentprop.Ignore || (currentprop.Column != null && currentprop.Column.IsNoInsert))
continue;
if (currentprop.Get != null)
ib.Insert(new DynamicColumn()
{
ColumnName = col,
Schema = schema == null ? null : schema.TryGetNullable(col.ToLower()),
Operator = DynamicColumn.CompareOperator.Eq,
Value = null,
VirtualColumn = true,
});
}
ib.FillCommand(cmd);
// Cache command
mapper.InsertCommandText = cmd.CommandText;
}
private void PrepareBatchUpdate<T>(DynamicTypeMap mapper, IDbCommand cmd, Dictionary<IDbDataParameter, DynamicPropertyInvoker> parameters)
{
DynamicPropertyInvoker currentprop = null;
var temp = new Dictionary<string, DynamicPropertyInvoker>();
var schema = this.GetSchema<T>();
int ord = 0;
var ib = Update<T>()
.SetVirtualMode(true)
.CreateTemporaryParameterAction(p => temp[p.Name] = currentprop)
.CreateParameterAction((p, cp) =>
{
parameters[cp] = temp[p.Name];
parameters[cp].UpdateCommandParameter = new DynamicPropertyInvoker.ParameterSpec
{
Name = cp.ParameterName,
Type = cp.DbType,
Ordinal = ord++,
};
});
foreach (var prop in mapper.PropertyMap)
if (!mapper.Ignored.Contains(prop.Key))
{
var col = mapper.PropertyMap.TryGetValue(prop.Key) ?? prop.Key;
currentprop = mapper.ColumnsMap.TryGetValue(col.ToLower());
if (currentprop.Ignore)
continue;
if (currentprop.Get != null)
{
var colS = schema == null ? null : schema.TryGetNullable(col.ToLower());
if (colS.HasValue)
{
if (colS.Value.IsKey)
ib.Where(new DynamicColumn()
{
ColumnName = col,
Schema = colS,
Operator = DynamicColumn.CompareOperator.Eq,
Value = null,
VirtualColumn = true,
});
else if (currentprop.Column == null || !currentprop.Column.IsNoUpdate)
ib.Values(new DynamicColumn()
{
ColumnName = col,
Schema = colS,
Operator = DynamicColumn.CompareOperator.Eq,
Value = null,
VirtualColumn = true,
});
}
else if (currentprop.Column != null && currentprop.Column.IsKey)
ib.Where(new DynamicColumn()
{
ColumnName = col,
Schema = colS,
Operator = DynamicColumn.CompareOperator.Eq,
Value = null,
VirtualColumn = true,
});
}
}
ib.FillCommand(cmd);
// Cache command
mapper.UpdateCommandText = cmd.CommandText;
}
private void PrepareBatchDelete<T>(DynamicTypeMap mapper, IDbCommand cmd, Dictionary<IDbDataParameter, DynamicPropertyInvoker> parameters)
{
DynamicPropertyInvoker currentprop = null;
var temp = new Dictionary<string, DynamicPropertyInvoker>();
var schema = this.GetSchema<T>();
int ord = 0;
var ib = Delete<T>()
.SetVirtualMode(true)
.CreateTemporaryParameterAction(p => temp[p.Name] = currentprop)
.CreateParameterAction((p, cp) =>
{
parameters[cp] = temp[p.Name];
parameters[cp].DeleteCommandParameter = new DynamicPropertyInvoker.ParameterSpec
{
Name = cp.ParameterName,
Type = cp.DbType,
Ordinal = ord++,
};
});
foreach (var prop in mapper.PropertyMap)
if (!mapper.Ignored.Contains(prop.Key))
{
var col = mapper.PropertyMap.TryGetValue(prop.Key) ?? prop.Key;
currentprop = mapper.ColumnsMap.TryGetValue(col.ToLower());
if (currentprop.Ignore)
continue;
if (currentprop.Get != null)
{
var colS = schema == null ? null : schema.TryGetNullable(col.ToLower());
if (colS != null)
{
if (colS.Value.IsKey)
ib.Where(new DynamicColumn()
{
ColumnName = col,
Schema = colS,
Operator = DynamicColumn.CompareOperator.Eq,
Value = null,
VirtualColumn = true,
});
}
else if (currentprop.Column != null && currentprop.Column.IsKey)
ib.Where(new DynamicColumn()
{
ColumnName = col,
Schema = colS,
Operator = DynamicColumn.CompareOperator.Eq,
Value = null,
VirtualColumn = true,
});
}
}
ib.FillCommand(cmd);
// Cache command
mapper.DeleteCommandText = cmd.CommandText;
}
#endregion From/Insert/Update/Delete
#region Schema
/// <summary>Builds table cache if necessary and returns it.</summary>
/// <param name="table">Name of table for which build schema.</param>
/// <param name="owner">Owner of table for which build schema.</param>
/// <returns>Table schema.</returns>
public Dictionary<string, DynamicSchemaColumn> GetSchema(string table, string owner = null)
{
Dictionary<string, DynamicSchemaColumn> schema = null;
lock (SyncLock)
schema = Schema.TryGetValue(table.ToLower()) ??
BuildAndCacheSchema(table, null, owner);
return schema;
}
/// <summary>Builds table cache if necessary and returns it.</summary>
/// <typeparam name="T">Type of table for which build schema.</typeparam>
/// <returns>Table schema or null if type was anonymous.</returns>
public Dictionary<string, DynamicSchemaColumn> GetSchema<T>()
{
if (typeof(T).IsAnonymous())
return null;
Dictionary<string, DynamicSchemaColumn> schema = null;
lock (SyncLock)
schema = Schema.TryGetValue(typeof(T).FullName) ??
BuildAndCacheSchema(null, DynamicMapperCache.GetMapper<T>());
return schema;
}
/// <summary>Builds table cache if necessary and returns it.</summary>
/// <param name="table">Type of table for which build schema.</param>
/// <returns>Table schema or null if type was anonymous.</returns>
public Dictionary<string, DynamicSchemaColumn> GetSchema(Type table)
{
if (table == null || table.IsAnonymous() || table.IsValueType)
return null;
Dictionary<string, DynamicSchemaColumn> schema = null;
lock (SyncLock)
schema = Schema.TryGetValue(table.FullName) ??
BuildAndCacheSchema(null, DynamicMapperCache.GetMapper(table));
return schema;
}
/// <summary>Get schema describing objects from reader.</summary>
/// <param name="table">Table from which extract column info.</param>
/// <param name="owner">Owner of table from which extract column info.</param>
/// <returns>List of <see cref="DynamicSchemaColumn"/> objects .
/// If your database doesn't get those values in upper case (like most of the databases) you should override this method.</returns>
protected virtual IEnumerable<DynamicSchemaColumn> ReadSchema(string table, string owner)
{
using (var con = Open())
using (var cmd = con.CreateCommand())
{
using (var rdr = cmd
.SetCommand(string.Format("SELECT * FROM {0}{1} WHERE 1 = 0",
!string.IsNullOrEmpty(owner) ? string.Format("{0}.", DecorateName(owner)) : string.Empty,
DecorateName(table)))
.ExecuteReader(CommandBehavior.SchemaOnly | CommandBehavior.KeyInfo))
foreach (DataRow col in rdr.GetSchemaTable().Rows)
{
var c = col.RowToDynamicUpper();
yield return new DynamicSchemaColumn
{
Name = c.COLUMNNAME,
Type = DynamicExtensions.TypeMap.TryGetNullable((Type)c.DATATYPE) ?? DbType.String,
IsKey = c.ISKEY ?? false,
IsUnique = c.ISUNIQUE ?? false,
Size = (int)(c.COLUMNSIZE ?? 0),
Precision = (byte)(c.NUMERICPRECISION ?? 0),
Scale = (byte)(c.NUMERICSCALE ?? 0)
};
}
}
}
private Dictionary<string, DynamicSchemaColumn> BuildAndCacheSchema(string tableName, DynamicTypeMap mapper, string owner = null)
{
Dictionary<string, DynamicSchemaColumn> schema = null;
if (mapper != null)
tableName = mapper.Table == null || string.IsNullOrEmpty(mapper.Table.Name) ?
mapper.Type.Name : mapper.Table.Name;
bool databaseSchemaSupport = !string.IsNullOrEmpty(tableName) &&
(Options & DynamicDatabaseOptions.SupportSchema) == DynamicDatabaseOptions.SupportSchema;
bool mapperSchema = mapper != null && mapper.Table != null && (mapper.Table.Override || !databaseSchemaSupport);
#region Database schema
if (databaseSchemaSupport && !Schema.ContainsKey(tableName.ToLower()))
{
schema = ReadSchema(tableName, owner)
.ToDictionary(k => k.Name.ToLower(), k => k);
Schema[tableName.ToLower()] = schema;
}
#endregion Database schema
#region Type schema
if ((mapperSchema && !Schema.ContainsKey(mapper.Type.FullName)) ||
(schema == null && mapper != null && !mapper.Type.IsAnonymous()))
{
// TODO: Ged rid of this monster below...
if (databaseSchemaSupport)
{
#region Merge with db schema
schema = mapper.ColumnsMap.ToDictionary(k => k.Key, (v) =>
{
DynamicSchemaColumn? col = Schema[tableName.ToLower()].TryGetNullable(v.Key);
return new DynamicSchemaColumn
{
Name = DynamicExtensions.Coalesce<string>(
v.Value.Column == null || string.IsNullOrEmpty(v.Value.Column.Name) ? null : v.Value.Column.Name,
col.HasValue && !string.IsNullOrEmpty(col.Value.Name) ? col.Value.Name : null,
v.Value.Name),
IsKey = DynamicExtensions.CoalesceNullable<bool>(
v.Value.Column != null ? v.Value.Column.IsKey : false,
col.HasValue ? col.Value.IsKey : false).Value,
Type = DynamicExtensions.CoalesceNullable<DbType>(
v.Value.Column != null ? v.Value.Column.Type : null,
col.HasValue ? col.Value.Type : DynamicExtensions.TypeMap.TryGetNullable(v.Value.Type) ?? DbType.String).Value,
IsUnique = DynamicExtensions.CoalesceNullable<bool>(
v.Value.Column != null ? v.Value.Column.IsUnique : null,
col.HasValue ? col.Value.IsUnique : false).Value,
Size = DynamicExtensions.CoalesceNullable<int>(
v.Value.Column != null ? v.Value.Column.Size : null,
col.HasValue ? col.Value.Size : 0).Value,
Precision = DynamicExtensions.CoalesceNullable<byte>(
v.Value.Column != null ? v.Value.Column.Precision : null,
col.HasValue ? col.Value.Precision : (byte)0).Value,
Scale = DynamicExtensions.CoalesceNullable<byte>(
v.Value.Column != null ? v.Value.Column.Scale : null,
col.HasValue ? col.Value.Scale : (byte)0).Value,
};
});
#endregion Merge with db schema
}
else
{
#region MapEnumerable based only on type
schema = mapper.ColumnsMap.ToDictionary(k => k.Key,
v => new DynamicSchemaColumn
{
Name = DynamicExtensions.Coalesce<string>(v.Value.Column == null || string.IsNullOrEmpty(v.Value.Column.Name) ? null : v.Value.Column.Name, v.Value.Name),
IsKey = DynamicExtensions.CoalesceNullable<bool>(v.Value.Column != null ? v.Value.Column.IsKey : false, false).Value,
Type = DynamicExtensions.CoalesceNullable<DbType>(v.Value.Column != null ? v.Value.Column.Type : null, DynamicExtensions.TypeMap.TryGetNullable(v.Value.Type) ?? DbType.String).Value,
IsUnique = DynamicExtensions.CoalesceNullable<bool>(v.Value.Column != null ? v.Value.Column.IsUnique : null, false).Value,
Size = DynamicExtensions.CoalesceNullable<int>(v.Value.Column != null ? v.Value.Column.Size : null, 0).Value,
Precision = DynamicExtensions.CoalesceNullable<byte>(v.Value.Column != null ? v.Value.Column.Precision : null, 0).Value,
Scale = DynamicExtensions.CoalesceNullable<byte>(v.Value.Column != null ? v.Value.Column.Scale : null, 0).Value,
});
#endregion MapEnumerable based only on type
}
}
if (mapper != null && schema != null)
Schema[mapper.Type.FullName] = schema;
#endregion Type schema
return schema;
}
#endregion Schema
#region Decorators
/// <summary>Gets or sets left side decorator for database objects.</summary>
public string LeftDecorator
{
get { return _leftDecorator; }
set
{
_leftDecorator = value;
_leftDecoratorIsInInvalidMembersChars =
_leftDecorator.Length == 1 && StringExtensions.InvalidMemberChars.Contains(_leftDecorator[0]);
}
}
/// <summary>Gets or sets right side decorator for database objects.</summary>
public string RightDecorator
{
get { return _rightDecorator; }
set
{
_rightDecorator = value;
_rightDecoratorIsInInvalidMembersChars =
_rightDecorator.Length == 1 && StringExtensions.InvalidMemberChars.Contains(_rightDecorator[0]);
}
}
/// <summary>Gets or sets parameter name format.</summary>
public string ParameterFormat { get { return _parameterFormat; } set { _parameterFormat = value; } }
/// <summary>Decorate string representing name of database object.</summary>
/// <param name="name">Name of database object.</param>
/// <returns>Decorated name of database object.</returns>
public string DecorateName(string name)
{
return String.Concat(_leftDecorator, name, _rightDecorator);
}
/// <summary>Strip string representing name of database object from decorators.</summary>
/// <param name="name">Decorated name of database object.</param>
/// <returns>Not decorated name of database object.</returns>
public string StripName(string name)
{
string res = name.Trim(StringExtensions.InvalidMemberChars);
if (!_leftDecoratorIsInInvalidMembersChars && res.StartsWith(_leftDecorator))
res = res.Substring(_leftDecorator.Length);
if (!_rightDecoratorIsInInvalidMembersChars && res.EndsWith(_rightDecorator))
res = res.Substring(0, res.Length - _rightDecorator.Length);
return res;
}
/// <summary>Decorate string representing name of database object.</summary>
/// <param name="sb">String builder to which add decorated name.</param>
/// <param name="name">Name of database object.</param>
public void DecorateName(StringBuilder sb, string name)
{
sb.Append(_leftDecorator);
sb.Append(name);
sb.Append(_rightDecorator);
}
/// <summary>Get database parameter name.</summary>
/// <param name="parameter">Friendly parameter name or number.</param>
/// <returns>Formatted parameter name.</returns>
public string GetParameterName(object parameter)
{
return String.Format(_parameterFormat, parameter).Replace(" ", "_");
}
/// <summary>Get database parameter name.</summary>
/// <param name="sb">String builder to which add parameter name.</param>
/// <param name="parameter">Friendly parameter name or number.</param>
public void GetParameterName(StringBuilder sb, object parameter)
{
sb.AppendFormat(_parameterFormat, parameter.ToString().Replace(" ", "_"));
}
#endregion Decorators
#region Connection
/// <summary>Open managed connection.</summary>
/// <returns>Opened connection.</returns>
public IDbConnection Open()
{
IDbConnection conn = null;
DynamicConnection ret = null;
bool opened = false;
lock (SyncLock)
{
if (_tempConn == null)
{
if (TransactionPool.Count == 0 || !_singleConnection)
{
conn = _provider.CreateConnection();
conn.ConnectionString = _connectionString;
conn.Open();
opened = true;
TransactionPool.Add(conn, new Stack<IDbTransaction>());
CommandsPool.Add(conn, new List<IDbCommand>());
}
else
{
conn = TransactionPool.Keys.First();
if (conn.State != ConnectionState.Open)
{
conn.Open();
opened = true;
}
}
ret = new DynamicConnection(this, conn, _singleTransaction);
}
else
ret = _tempConn;
}
if (opened)
ExecuteInitCommands(ret);
return ret;
}
/// <summary>Close connection if we are allowed to.</summary>
/// <param name="connection">Connection to manage.</param>
internal void Close(IDbConnection connection)
{
if (connection == null)
return;
if (!_singleConnection && connection != null && TransactionPool.ContainsKey(connection))
{
// Close all commands
if (CommandsPool.ContainsKey(connection))
{
var tmp = CommandsPool[connection].ToList();
tmp.ForEach(cmd => cmd.Dispose());
CommandsPool[connection].Clear();
}
// Rollback remaining transactions
while (TransactionPool[connection].Count > 0)
{
IDbTransaction trans = TransactionPool[connection].Pop();
trans.Rollback();
trans.Dispose();
}
// Close connection
if (connection.State == ConnectionState.Open)
connection.Close();
// remove from pools
lock (SyncLock)
{
TransactionPool.Remove(connection);
CommandsPool.Remove(connection);
}
// Set stamp
_poolStamp = DateTime.Now.Ticks;
// Dispose the corpse
connection.Dispose();
}
}
/// <summary>Gets or sets contains commands executed when connection is opened.</summary>
public List<string> InitCommands { get; set; }
private void ExecuteInitCommands(IDbConnection conn)
{
if (InitCommands != null)
using (IDbCommand command = conn.CreateCommand())
foreach (string commandText in InitCommands)
command
.SetCommand(commandText)
.ExecuteNonQuery();
}
#endregion Connection
#region Transaction
/// <summary>Begins a global database transaction.</summary>
/// <remarks>Using this method connection is set to single open
/// connection until all transactions are finished.</remarks>
/// <returns>Returns <see cref="DynamicTransaction"/> representation.</returns>
public IDbTransaction BeginTransaction()
{
_tempConn = Open() as DynamicConnection;
return _tempConn.BeginTransaction(null, () =>
{
var t = TransactionPool.TryGetValue(_tempConn.Connection);
if (t == null | t.Count == 0)
{
_tempConn.Dispose();
_tempConn = null;
}
});
}
#endregion Transaction
#region IExtendedDisposable Members
/// <summary>Performs application-defined tasks associated with freeing,
/// releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
#if !DYNAMORM_OMMIT_OLDSYNTAX
var tables = TablesCache.Values.ToList();
TablesCache.Clear();
tables.ForEach(t => t.Dispose());
#endif
foreach (var con in TransactionPool)
{
// Close all commands
if (CommandsPool.ContainsKey(con.Key))
{
var tmp = CommandsPool[con.Key].ToList();
tmp.ForEach(cmd => cmd.Dispose());
CommandsPool[con.Key].Clear();
}
// Rollback remaining transactions
while (con.Value.Count > 0)
{
IDbTransaction trans = con.Value.Pop();
trans.Rollback();
trans.Dispose();
}
// Close connection
if (con.Key.State == ConnectionState.Open)
con.Key.Close();
// Dispose it
con.Key.Dispose();
}
// Clear pools
lock (SyncLock)
{
TransactionPool.Clear();
CommandsPool.Clear();
}
IsDisposed = true;
}
/// <summary>Gets a value indicating whether this instance is disposed.</summary>
public bool IsDisposed { get; private set; }
#endregion IExtendedDisposable Members
}
/// <summary>Represents database connection options.</summary>
[Flags]
[System.Reflection.ObfuscationAttribute(Feature = "renaming", ApplyToMembers = true)]
public enum DynamicDatabaseOptions
{
/// <summary>No specific options.</summary>
None = 0x00000000,
/// <summary>Only single persistent database connection.</summary>
SingleConnection = 0x00000001,
/// <summary>Only one transaction.</summary>
SingleTransaction = 0x00000002,
/// <summary>Database supports top syntax (SELECT TOP x ... FROM ...).</summary>
SupportTop = 0x00000080,
/// <summary>Database supports limit offset syntax (SELECT ... FROM ... LIMIT x OFFSET y).</summary>
SupportLimitOffset = 0x00000040,
/// <summary>Database support standard schema.</summary>
SupportSchema = 0x00000010,
/// <summary>Database support stored procedures (EXEC procedure ...).</summary>
SupportStoredProcedures = 0x00000020,
/// <summary>Debug option allowing to enable command dumps by default.</summary>
DumpCommands = 0x01000000,
}
/// <summary>Extension to ORM objects.</summary>
public static class DynamicExtensions
{
#region Type column map
/// <summary>MapEnumerable of .NET types to <see cref="DbType"/>.</summary>
public static readonly Dictionary<Type, DbType> TypeMap = new Dictionary<Type, DbType>()
{
{ typeof(byte), DbType.Byte },
{ typeof(sbyte), DbType.SByte },
{ typeof(short), DbType.Int16 },
{ typeof(ushort), DbType.UInt16 },
{ typeof(int), DbType.Int32 },
{ typeof(uint), DbType.UInt32 },
{ typeof(long), DbType.Int64 },
{ typeof(ulong), DbType.UInt64 },
{ typeof(float), DbType.Single },
{ typeof(double), DbType.Double },
{ typeof(decimal), DbType.Decimal },
{ typeof(bool), DbType.Boolean },
{ typeof(string), DbType.String },
{ typeof(char), DbType.StringFixedLength },
{ typeof(Guid), DbType.Guid },
{ typeof(DateTime), DbType.DateTime },
{ typeof(DateTimeOffset), DbType.DateTimeOffset },
{ typeof(byte[]), DbType.Binary },
{ typeof(byte?), DbType.Byte },
{ typeof(sbyte?), DbType.SByte },
{ typeof(short?), DbType.Int16 },
{ typeof(ushort?), DbType.UInt16 },
{ typeof(int?), DbType.Int32 },
{ typeof(uint?), DbType.UInt32 },
{ typeof(long?), DbType.Int64 },
{ typeof(ulong?), DbType.UInt64 },
{ typeof(float?), DbType.Single },
{ typeof(double?), DbType.Double },
{ typeof(decimal?), DbType.Decimal },
{ typeof(bool?), DbType.Boolean },
{ typeof(char?), DbType.StringFixedLength },
{ typeof(Guid?), DbType.Guid },
{ typeof(DateTime?), DbType.DateTime },
{ typeof(DateTimeOffset?), DbType.DateTimeOffset }
};
#endregion Type column map
#region Command extensions
/// <summary>Set <see cref="System.Data.IDbCommand"/> connection on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> in which changes will be made.</param>
/// <param name="connection"><see cref="System.Data.IDbConnection"/> which will be set to <see cref="System.Data.IDbCommand"/> instance.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand SetConnection(this IDbCommand command, IDbConnection connection)
{
command.Connection = connection;
return command;
}
/// <summary>Set <see cref="System.Data.IDbCommand"/> connection on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> in which changes will be made.</param>
/// <param name="transaction"><see cref="System.Data.IDbTransaction"/> which will be set to <see cref="System.Data.IDbCommand"/> instance.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand SetTransaction(this IDbCommand command, IDbTransaction transaction)
{
command.Transaction = transaction;
return command;
}
#region SetCommand
/// <summary>Set <see cref="System.Data.IDbCommand"/> properties on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> in which changes will be made.</param>
/// <param name="commandType">Indicates or specifies how the <see cref="System.Data.IDbCommand.CommandText"/> property is interpreted.</param>
/// <param name="commandTimeout">The wait time before terminating the attempt to execute a command and generating an error.</param>
/// <param name="commandText">The text command to run against the data source.</param>
/// <param name="args">Arguments used to format command.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand SetCommand(this IDbCommand command, CommandType commandType, int commandTimeout, string commandText, params object[] args)
{
command.CommandType = commandType;
command.CommandTimeout = commandTimeout;
if (args != null && args.Length > 0)
command.CommandText = string.Format(commandText, args);
else
command.CommandText = commandText;
return command;
}
/// <summary>Set <see cref="System.Data.IDbCommand"/> properties on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> in which changes will be made.</param>
/// <param name="commandTimeout">The wait time before terminating the attempt to execute a command and generating an error.</param>
/// <param name="commandText">The text command to run against the data source.</param>
/// <param name="args">Arguments used to format command.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand SetCommand(this IDbCommand command, int commandTimeout, string commandText, params object[] args)
{
command.CommandTimeout = commandTimeout;
if (args != null && args.Length > 0)
command.CommandText = string.Format(commandText, args);
else
command.CommandText = commandText;
return command;
}
/// <summary>Set <see cref="System.Data.IDbCommand"/> properties on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> in which changes will be made.</param>
/// <param name="commandType">Indicates or specifies how the <see cref="System.Data.IDbCommand.CommandText"/> property is interpreted.</param>
/// <param name="commandText">The text command to run against the data source.</param>
/// <param name="args">Arguments used to format command.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand SetCommand(this IDbCommand command, CommandType commandType, string commandText, params object[] args)
{
command.CommandType = commandType;
if (args != null && args.Length > 0)
command.CommandText = string.Format(commandText, args);
else
command.CommandText = commandText;
return command;
}
/// <summary>Set <see cref="System.Data.IDbCommand"/> properties on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> in which changes will be made.</param>
/// <param name="commandText">The text command to run against the data source.</param>
/// <param name="args">Arguments used to format command.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand SetCommand(this IDbCommand command, string commandText, params object[] args)
{
if (args != null && args.Length > 0)
command.CommandText = string.Format(commandText, args);
else
command.CommandText = commandText;
return command;
}
/// <summary>Set <see cref="System.Data.IDbCommand"/> properties on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> in which changes will be made.</param>
/// <param name="builder">Command builder.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand SetCommand(this IDbCommand command, IDynamicQueryBuilder builder)
{
builder.FillCommand(command);
return command;
}
#endregion SetCommand
#region AddParameter
/// <summary>Extension method for adding in a bunch of parameters.</summary>
/// <param name="cmd">Command to handle.</param>
/// <param name="database">Database object required to get proper formatting.</param>
/// <param name="args">Items to add.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameters(this IDbCommand cmd, DynamicDatabase database, params object[] args)
{
if (args != null && args.Count() > 0)
foreach (var item in args)
cmd.AddParameter(database, item);
return cmd;
}
/// <summary>Extension method for adding in a bunch of parameters.</summary>
/// <param name="cmd">Command to handle.</param>
/// <param name="database">Database object required to get proper formatting.</param>
/// <param name="args">Items to add in an expando object.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameters(this IDbCommand cmd, DynamicDatabase database, ExpandoObject args)
{
if (args != null && args.Count() > 0)
foreach (var item in args.ToDictionary())
cmd.AddParameter(database, item.Key, item.Value);
return cmd;
}
/// <summary>Extension for adding single parameter determining only type of object.</summary>
/// <param name="cmd">Command to handle.</param>
/// <param name="database">Database object required to get proper formatting.</param>
/// <param name="item">Items to add.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand cmd, DynamicDatabase database, object item)
{
return cmd.AddParameter(database, database.GetParameterName(cmd.Parameters.Count), item);
}
/// <summary>Extension for adding single parameter determining only type of object.</summary>
/// <param name="cmd">Command to handle.</param>
/// <param name="database">Database object required to get proper formatting.</param>
/// <param name="name">Name of parameter.</param>
/// <param name="item">Items to add.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand cmd, DynamicDatabase database, string name, object item)
{
var p = cmd.CreateParameter();
p.ParameterName = name;
if (item == null || item == DBNull.Value)
p.Value = DBNull.Value;
else
{
Type type = item.GetType();
p.DbType = TypeMap.TryGetNullable(type) ?? DbType.String;
if (type == typeof(ExpandoObject))
p.Value = ((IDictionary<string, object>)item).Values.FirstOrDefault();
else
p.Value = item;
if (p.DbType == DbType.String)
p.Size = item.ToString().Length > 4000 ? -1 : 4000;
}
cmd.Parameters.Add(p);
return cmd;
}
/// <summary>Extension for adding single parameter determining only type of object.</summary>
/// <param name="cmd">Command to handle.</param>
/// <param name="builder">Query builder containing schema.</param>
/// <param name="col">Column schema to use.</param>
/// <param name="value">Parameter value.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand cmd, IDynamicQueryBuilder builder, DynamicSchemaColumn? col, object value)
{
var p = cmd.CreateParameter();
p.ParameterName = builder.Database.GetParameterName(cmd.Parameters.Count);
if (col.HasValue)
{
p.DbType = col.Value.Type;
if ((builder.Database.Options & DynamicDatabaseOptions.SupportSchema) == DynamicDatabaseOptions.SupportSchema)
{
p.Size = col.Value.Size;
p.Precision = col.Value.Precision;
p.Scale = col.Value.Scale;
// Quick fix - review that
// Quick fix 2 - use item.Schema in that case
if (p.Scale > p.Precision)
p.Scale = 4;
}
p.Value = value == null ? DBNull.Value : value;
}
else if (value == null || value == DBNull.Value)
p.Value = DBNull.Value;
else
{
p.DbType = TypeMap.TryGetNullable(value.GetType()) ?? DbType.String;
if (p.DbType == DbType.String)
p.Size = value.ToString().Length > 4000 ? -1 : 4000;
p.Value = value;
}
cmd.Parameters.Add(p);
return cmd;
}
/// <summary>Extension for adding single parameter determining only type of object.</summary>
/// <param name="cmd">Command to handle.</param>
/// <param name="builder">Query builder containing schema.</param>
/// <param name="item">Column item to add.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand cmd, IDynamicQueryBuilder builder, DynamicColumn item)
{
var p = cmd.CreateParameter();
p.ParameterName = builder.Database.GetParameterName(cmd.Parameters.Count);
var col = item.Schema ?? (builder as DynamicQueryBuilder)
.NullOr(b => b.GetColumnFromSchema(item.ColumnName),
builder.Tables.FirstOrDefault()
.NullOr(t => t.Schema
.NullOr(s => s.TryGetNullable(item.ColumnName.ToLower()), null), null));
if (col.HasValue)
{
p.DbType = col.Value.Type;
if (builder.SupportSchema)
{
p.Size = col.Value.Size;
p.Precision = col.Value.Precision;
p.Scale = col.Value.Scale;
// Quick fix - review that
// Quick fix 2 - use item.Schema in that case
if (p.Scale > p.Precision)
p.Scale = 4;
}
p.Value = item.Value == null ? DBNull.Value : item.Value;
}
else if (item.Value == null || item.Value == DBNull.Value)
p.Value = DBNull.Value;
else
{
p.DbType = TypeMap.TryGetNullable(item.Value.GetType()) ?? DbType.String;
if (p.DbType == DbType.String)
p.Size = item.Value.ToString().Length > 4000 ? -1 : 4000;
p.Value = item.Value;
}
cmd.Parameters.Add(p);
return cmd;
}
/// <summary>Add <see cref="System.Data.IDataParameter"/> to <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="parameterDirection">Value indicating whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="databaseType">The <see cref="System.Data.DbType"/> of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="size">The size of the parameter.</param>
/// <param name="precision">Indicates the precision of numeric parameters.</param>
/// <param name="scale">Indicates the scale of numeric parameters.</param>
/// <param name="value">The value of the <see cref="System.Data.IDataParameter"/>.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand command, string parameterName, ParameterDirection parameterDirection, DbType databaseType, int size, byte precision, byte scale, object value)
{
IDbDataParameter param = command.CreateParameter();
param.ParameterName = parameterName;
param.Direction = parameterDirection;
param.DbType = databaseType;
param.Size = size;
param.Precision = precision;
param.Scale = scale;
param.Value = value;
command.Parameters.Add(param);
return command;
}
/// <summary>Add <see cref="System.Data.IDataParameter"/> to <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="parameterDirection">Value indicating whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="databaseType">The <see cref="System.Data.DbType"/> of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="size">The size of the parameter.</param>
/// <param name="precision">Indicates the precision of numeric parameters.</param>
/// <param name="scale">Indicates the scale of numeric parameters.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand command, string parameterName, ParameterDirection parameterDirection, DbType databaseType, int size, byte precision, byte scale)
{
IDbDataParameter param = command.CreateParameter();
param.ParameterName = parameterName;
param.Direction = parameterDirection;
param.DbType = databaseType;
param.Size = size;
param.Precision = precision;
param.Scale = scale;
command.Parameters.Add(param);
return command;
}
/// <summary>Add <see cref="System.Data.IDataParameter"/> to <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="parameterDirection">Value indicating whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="databaseType">The <see cref="System.Data.DbType"/> of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="precision">Indicates the precision of numeric parameters.</param>
/// <param name="scale">Indicates the scale of numeric parameters.</param>
/// <param name="value">The value of the <see cref="System.Data.IDataParameter"/>.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand command, string parameterName, ParameterDirection parameterDirection, DbType databaseType, byte precision, byte scale, object value)
{
IDbDataParameter param = command.CreateParameter();
param.ParameterName = parameterName;
param.Direction = parameterDirection;
param.DbType = databaseType;
param.Precision = precision;
param.Scale = scale;
param.Value = value;
command.Parameters.Add(param);
return command;
}
/// <summary>Add <see cref="System.Data.IDataParameter"/> to <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="databaseType">The <see cref="System.Data.DbType"/> of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="precision">Indicates the precision of numeric parameters.</param>
/// <param name="scale">Indicates the scale of numeric parameters.</param>
/// <param name="value">The value of the <see cref="System.Data.IDataParameter"/>.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand command, string parameterName, DbType databaseType, byte precision, byte scale, object value)
{
IDbDataParameter param = command.CreateParameter();
param.ParameterName = parameterName;
param.DbType = databaseType;
param.Precision = precision;
param.Scale = scale;
param.Value = value;
command.Parameters.Add(param);
return command;
}
/// <summary>Add <see cref="System.Data.IDataParameter"/> to <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="databaseType">The <see cref="System.Data.DbType"/> of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="precision">Indicates the precision of numeric parameters.</param>
/// <param name="scale">Indicates the scale of numeric parameters.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand command, string parameterName, DbType databaseType, byte precision, byte scale)
{
IDbDataParameter param = command.CreateParameter();
param.ParameterName = parameterName;
param.DbType = databaseType;
param.Precision = precision;
param.Scale = scale;
command.Parameters.Add(param);
return command;
}
/// <summary>Add <see cref="System.Data.IDataParameter"/> to <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="parameterDirection">Value indicating whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="databaseType">The <see cref="System.Data.DbType"/> of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="size">The size of the parameter.</param>
/// <param name="value">The value of the <see cref="System.Data.IDataParameter"/>.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand command, string parameterName, ParameterDirection parameterDirection, DbType databaseType, int size, object value)
{
IDbDataParameter param = command.CreateParameter();
param.ParameterName = parameterName;
param.Direction = parameterDirection;
param.DbType = databaseType;
param.Size = size;
param.Value = value;
command.Parameters.Add(param);
return command;
}
/// <summary>Add <see cref="System.Data.IDataParameter"/> to <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="databaseType">The <see cref="System.Data.DbType"/> of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="size">The size of the parameter.</param>
/// <param name="value">The value of the <see cref="System.Data.IDataParameter"/>.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand command, string parameterName, DbType databaseType, int size, object value)
{
IDbDataParameter param = command.CreateParameter();
param.ParameterName = parameterName;
param.DbType = databaseType;
param.Size = size;
param.Value = value;
command.Parameters.Add(param);
return command;
}
/// <summary>Add <see cref="System.Data.IDataParameter"/> to <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="databaseType">The <see cref="System.Data.DbType"/> of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="value">The value of the <see cref="System.Data.IDataParameter"/>.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand command, string parameterName, DbType databaseType, object value)
{
IDbDataParameter param = command.CreateParameter();
param.ParameterName = parameterName;
param.DbType = databaseType;
param.Value = value;
command.Parameters.Add(param);
return command;
}
/// <summary>Add <see cref="System.Data.IDataParameter"/> to <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="databaseType">The <see cref="System.Data.DbType"/> of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="size">The size of the parameter.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand command, string parameterName, DbType databaseType, int size)
{
IDbDataParameter param = command.CreateParameter();
param.ParameterName = parameterName;
param.DbType = databaseType;
param.Size = size;
command.Parameters.Add(param);
return command;
}
/// <summary>Add <see cref="System.Data.IDataParameter"/> to <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="databaseType">The <see cref="System.Data.DbType"/> of the <see cref="System.Data.IDataParameter"/>.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand AddParameter(this IDbCommand command, string parameterName, DbType databaseType)
{
IDbDataParameter param = command.CreateParameter();
param.ParameterName = parameterName;
param.DbType = databaseType;
command.Parameters.Add(param);
return command;
}
#endregion AddParameter
#region SetParameter
/// <summary>Set <see cref="System.Data.IDataParameter"/> value for <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="parameterName">The name of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="value">Value to set on this parameter.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand SetParameter(this IDbCommand command, string parameterName, object value)
{
((IDbDataParameter)command.Parameters[parameterName]).Value = value;
return command;
}
/// <summary>Set <see cref="System.Data.IDataParameter"/> value for <see cref="System.Data.IDbCommand"/> on the fly.</summary>
/// <param name="command"><see cref="System.Data.IDbCommand"/> to which parameter will be added.</param>
/// <param name="index">Index of the <see cref="System.Data.IDataParameter"/>.</param>
/// <param name="value">Value to set on this parameter.</param>
/// <returns>Returns edited <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand SetParameter(this IDbCommand command, int index, object value)
{
((IDbDataParameter)command.Parameters[index]).Value = value;
return command;
}
#endregion SetParameter
#region Generic Execution
#if !DYNAMORM_OMMIT_GENERICEXECUTION && !DYNAMORM_OMMIT_TRYPARSE
/// <summary>Execute scalar and return string if possible.</summary>
/// <typeparam name="T">Type to parse to.</typeparam>
/// <param name="command"><see cref="System.Data.IDbCommand"/> which will be executed.</param>
/// <returns>Returns resulting instance of T from query.</returns>
public static T ExecuteScalarAs<T>(this IDbCommand command)
{
return ExecuteScalarAs<T>(command, default(T), null);
}
/// <summary>Execute scalar and return string if possible.</summary>
/// <typeparam name="T">Type to parse to.</typeparam>
/// <param name="command"><see cref="System.Data.IDbCommand"/> which will be executed.</param>
/// <param name="handler">Handler of a try parse method.</param>
/// <returns>Returns resulting instance of T from query.</returns>
public static T ExecuteScalarAs<T>(this IDbCommand command, DynamicExtensions.TryParseHandler<T> handler)
{
return ExecuteScalarAs<T>(command, default(T), handler);
}
/// <summary>Execute scalar and return string if possible.</summary>
/// <typeparam name="T">Type to parse to.</typeparam>
/// <param name="command"><see cref="System.Data.IDbCommand"/> which will be executed.</param>
/// <param name="defaultValue">Default result value.</param>
/// <returns>Returns resulting instance of T from query.</returns>
public static T ExecuteScalarAs<T>(this IDbCommand command, T defaultValue)
{
return ExecuteScalarAs<T>(command, defaultValue, null);
}
/// <summary>Execute scalar and return string if possible.</summary>
/// <typeparam name="T">Type to parse to.</typeparam>
/// <param name="command"><see cref="System.Data.IDbCommand"/> which will be executed.</param>
/// <param name="defaultValue">Default result value.</param>
/// <param name="handler">Handler of a try parse method.</param>
/// <returns>Returns resulting instance of T from query.</returns>
public static T ExecuteScalarAs<T>(this IDbCommand command, T defaultValue, DynamicExtensions.TryParseHandler<T> handler)
{
T ret = defaultValue;
object o = command.ExecuteScalar();
if (o is T)
return (T)o;
else if (o != DBNull.Value && o != null)
{
var method = typeof(T).GetMethod(
"TryParse",
new[]
{
typeof(string),
Type.GetType(string.Format("{0}&", typeof(T).FullName))
});
if (handler != null)
ret = o.ToString().TryParseDefault<T>(defaultValue, handler);
else if (method != null)
ret = o.ToString().TryParseDefault<T>(defaultValue, delegate(string v, out T r)
{
r = defaultValue;
return (bool)method.Invoke(null, new object[] { v, r });
});
else if (typeof(T) == typeof(string))
ret = (T)(o.ToString() as object);
else if (typeof(T) == typeof(object))
ret = (T)o;
else
throw new InvalidOperationException("Provided type can't be parsed using generic approach.");
}
return ret;
}
/// <summary>Execute enumerator of specified type.</summary>
/// <typeparam name="T">Type to parse to.</typeparam>
/// <param name="command"><see cref="System.Data.IDbCommand"/> which will be executed.</param>
/// <param name="defaultValue">Default result value.</param>
/// <param name="handler">Handler of a try parse method.</param>
/// <returns>Returns enumerator of specified type from query.</returns>
public static IEnumerable<T> ExecuteEnumeratorOf<T>(this IDbCommand command, T defaultValue, DynamicExtensions.TryParseHandler<T> handler) where T : struct
{
using (IDataReader reader = command.ExecuteReader())
{
var method = typeof(T).GetMethod(
"TryParse",
new[]
{
typeof(string),
Type.GetType(string.Format("{0}&", typeof(T).FullName))
});
while (reader.Read())
{
T ret = defaultValue;
if (!reader.IsDBNull(0))
{
object o = reader.GetValue(0);
if (o is T)
ret = (T)o;
else if (o != DBNull.Value)
{
if (handler != null)
ret = o.ToString().TryParseDefault<T>(defaultValue, handler);
else if (method != null)
ret = o.ToString().TryParseDefault<T>(defaultValue, delegate(string v, out T r)
{
r = defaultValue;
return (bool)method.Invoke(null, new object[] { v, r });
});
else if (typeof(T) == typeof(string))
ret = (T)(o.ToString() as object);
else if (typeof(T) == typeof(object))
ret = (T)o;
else
throw new InvalidOperationException("Provided type can't be parsed using generic approach.");
}
}
yield return ret;
}
}
}
#endif
#endregion Generic Execution
/// <summary>Dump command into text writer.</summary>
/// <param name="command">Command to dump.</param>
/// <param name="buider">Builder to which write output.</param>
/// <returns>Returns dumped <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand Dump(this IDbCommand command, StringBuilder buider)
{
using (StringWriter sw = new StringWriter(buider))
return command.Dump(sw);
}
/// <summary>Dump command into text writer.</summary>
/// <param name="command">Command to dump.</param>
/// <param name="writer">Writer to which write output.</param>
/// <returns>Returns dumped <see cref="System.Data.IDbCommand"/> instance.</returns>
public static IDbCommand Dump(this IDbCommand command, TextWriter writer)
{
writer.WriteLine("Type: {0}; Timeout: {1}; Query: {2}", command.CommandType, command.CommandTimeout, command.CommandText);
if (command.Parameters.Count > 0)
{
writer.WriteLine("Parameters:");
foreach (IDbDataParameter param in command.Parameters)
{
writer.WriteLine(" '{0}' ({1} (s:{2} p:{3} s:{4})) = '{5}' ({6});",
param.ParameterName,
param.DbType,
param.Scale,
param.Precision,
param.Scale,
param.Value is byte[] ? ConvertByteArrayToHexString((byte[])param.Value) : param.Value ?? "NULL",
param.Value != null ? param.Value.GetType().Name : "DBNull");
}
writer.WriteLine();
}
return command;
}
/// <summary>Convert byte array to hex formatted string without separators.</summary>
/// <param name="data">Byte Array Data.</param>
/// <returns>Hex string representation of byte array.</returns>
private static string ConvertByteArrayToHexString(byte[] data)
{
return ConvertByteArrayToHexString(data, 0);
}
/// <summary>Convert byte array to hex formatted string.</summary>
/// <param name="data">Byte Array Data.</param>
/// <param name="separatorEach">Put '-' each <c>separatorEach</c> characters.</param>
/// <returns>Hex string representation of byte array.</returns>
private static string ConvertByteArrayToHexString(byte[] data, int separatorEach)
{
int len = data.Length * 2;
System.Text.StringBuilder sb = new System.Text.StringBuilder();
for (int i = 0; i < len; i++)
{
sb.AppendFormat("{0:X}", data[(i / 2)] >> (((i % 2) == 0) ? 4 : 0) & 0x0F);
if ((separatorEach > 0) && ((i + 1) % separatorEach == 0))
sb.AppendFormat("-");
}
return sb.ToString();
}
#endregion Command extensions
#region Dynamic builders extensions
/// <summary>Turns an <see cref="IDynamicSelectQueryBuilder"/> to a Dynamic list of things.</summary>
/// <param name="b">Ready to execute builder.</param>
/// <returns>List of things.</returns>
public static List<dynamic> ToList(this IDynamicSelectQueryBuilder b)
{
return b.Execute().ToList();
}
/// <summary>Sets the on create temporary parameter action.</summary>
/// <typeparam name="T">Class implementing <see cref="IDynamicQueryBuilder"/> interface.</typeparam>
/// <param name="b">The builder on which set delegate.</param>
/// <param name="a">Action to invoke.</param>
/// <returns>Returns instance of builder on which action is set.</returns>
public static T CreateTemporaryParameterAction<T>(this T b, Action<IParameter> a) where T : IDynamicQueryBuilder
{
b.OnCreateTemporaryParameter = a;
return b;
}
/// <summary>Sets the on create real parameter action.</summary>
/// <typeparam name="T">Class implementing <see cref="IDynamicQueryBuilder"/> interface.</typeparam>
/// <param name="b">The builder on which set delegate.</param>
/// <param name="a">Action to invoke.</param>
/// <returns>Returns instance of builder on which action is set.</returns>
public static T CreateParameterAction<T>(this T b, Action<IParameter, IDbDataParameter> a) where T : IDynamicQueryBuilder
{
b.OnCreateParameter = a;
return b;
}
/// <summary>Sets the virtual mode on builder.</summary>
/// <typeparam name="T">Class implementing <see cref="IDynamicQueryBuilder"/> interface.</typeparam>
/// <param name="b">The builder on which set virtual mode.</param>
/// <param name="virtualMode">Virtual mode.</param>
/// <returns>Returns instance of builder on which virtual mode is set.</returns>
public static T SetVirtualMode<T>(this T b, bool virtualMode) where T : IDynamicQueryBuilder
{
b.VirtualMode = virtualMode;
return b;
}
/// <summary>Creates sub query that can be used inside of from/join/expressions.</summary>
/// <typeparam name="T">Class implementing <see cref="IDynamicQueryBuilder"/> interface.</typeparam>
/// <param name="b">The builder that will be parent of new sub query.</param>
/// <returns>Instance of sub query.</returns>
public static IDynamicSelectQueryBuilder SubQuery<T>(this T b) where T : IDynamicQueryBuilder
{
return new DynamicSelectQueryBuilder(b.Database, b as DynamicQueryBuilder);
}
/// <summary>Creates sub query that can be used inside of from/join/expressions.</summary>
/// <typeparam name="T">Class implementing <see cref="IDynamicQueryBuilder"/> interface.</typeparam>
/// <param name="b">The builder that will be parent of new sub query.</param>
/// <param name="fn">The specification for sub query.</param>
/// <param name="func">The specification for sub query.</param>
/// <returns>Instance of sub query.</returns>
public static IDynamicSelectQueryBuilder SubQuery<T>(this T b, Func<dynamic, object> fn, params Func<dynamic, object>[] func) where T : IDynamicQueryBuilder
{
return new DynamicSelectQueryBuilder(b.Database, b as DynamicQueryBuilder).From(fn, func);
}
/// <summary>Creates sub query that can be used inside of from/join/expressions.</summary>
/// <typeparam name="T">Class implementing <see cref="IDynamicQueryBuilder"/> interface.</typeparam>
/// <param name="b">The builder that will be parent of new sub query.</param>
/// <param name="subquery">First argument is parent query, second one is a sub query.</param>
/// <returns>This instance to permit chaining.</returns>
public static T SubQuery<T>(this T b, Action<T, IDynamicSelectQueryBuilder> subquery) where T : IDynamicQueryBuilder
{
var sub = b.SubQuery();
subquery(b, sub);
(b as DynamicQueryBuilder).ParseCommand(sub as DynamicQueryBuilder, b.Parameters);
return b;
}
/// <summary>Creates sub query that can be used inside of from/join/expressions.</summary>
/// <typeparam name="T">Class implementing <see cref="IDynamicQueryBuilder"/> interface.</typeparam>
/// <param name="b">The builder that will be parent of new sub query.</param>
/// <param name="subquery">First argument is parent query, second one is a sub query.</param>
/// <param name="fn">The specification for sub query.</param>
/// <param name="func">The specification for sub query.</param>
/// <returns>This instance to permit chaining.</returns>
public static T SubQuery<T>(this T b, Action<T, IDynamicSelectQueryBuilder> subquery, Func<dynamic, object> fn, params Func<dynamic, object>[] func) where T : IDynamicQueryBuilder
{
var sub = b.SubQuery(fn, func);
subquery(b, sub);
(b as DynamicQueryBuilder).ParseCommand(sub as DynamicQueryBuilder, b.Parameters);
return b;
}
#endregion Dynamic builders extensions
#region Dynamic extensions
/// <summary>Turns an <see cref="IDataReader"/> to a Dynamic list of things.</summary>
/// <param name="r">Reader from which read data.</param>
/// <returns>List of things.</returns>
public static List<dynamic> ToList(this IDataReader r)
{
var result = new List<dynamic>();
while (r.Read())
result.Add(r.RowToDynamic());
return result;
}
/// <summary>Turns an <see cref="IDynamicSelectQueryBuilder"/> to a Dynamic list of things with specified type.</summary>
/// <typeparam name="T">Type of object to map on.</typeparam>
/// <param name="b">Ready to execute builder.</param>
/// <returns>List of things.</returns>
public static List<T> ToList<T>(this IDynamicSelectQueryBuilder b) where T : class
{
return b.Execute<T>().ToList();
}
/// <summary>Turns the dictionary into an ExpandoObject.</summary>
/// <param name="d">Dictionary to convert.</param>
/// <returns>Converted dictionary.</returns>
public static dynamic ToDynamic(this IDictionary<string, object> d)
{
var result = new ExpandoObject();
var dict = result as IDictionary<string, object>;
foreach (var prop in d)
dict.Add(prop.Key, prop.Value);
return result;
}
/// <summary>Turns the object into an ExpandoObject.</summary>
/// <param name="o">Object to convert.</param>
/// <returns>Converted object.</returns>
public static dynamic ToDynamic(this object o)
{
var result = new ExpandoObject();
var dict = result as IDictionary<string, object>;
var ot = o.GetType();
if (ot == typeof(ExpandoObject))
return o;
if (o is IDictionary<string, object>)
((IDictionary<string, object>)o)
.ToList()
.ForEach(kvp => dict.Add(kvp.Key, kvp.Value));
else if (ot == typeof(NameValueCollection) || ot.IsSubclassOf(typeof(NameValueCollection)))
{
var nameValue = (NameValueCollection)o;
nameValue.Cast<string>()
.Select(key => new KeyValuePair<string, object>(key, nameValue[key]))
.ToList()
.ForEach(i => dict.Add(i));
}
else
{
var mapper = DynamicMapperCache.GetMapper(ot);
if (mapper != null)
{
foreach (var item in mapper.ColumnsMap.Values)
if (item.Get != null)
dict.Add(item.Name, item.Get(o));
}
else
{
var props = ot.GetProperties();
foreach (var item in props)
if (item.CanRead)
dict.Add(item.Name, item.GetValue(o, null));
}
}
return result;
}
/// <summary>Convert data row row into dynamic object.</summary>
/// <param name="r">DataRow from which read.</param>
/// <returns>Generated dynamic object.</returns>
public static dynamic RowToDynamic(this DataRow r)
{
dynamic e = new ExpandoObject();
var d = e as IDictionary<string, object>;
int len = r.Table.Columns.Count;
for (int i = 0; i < len; i++)
d.Add(r.Table.Columns[i].ColumnName, r.IsNull(i) ? null : r[i]);
return e;
}
/// <summary>Convert data row row into dynamic object (upper case key).</summary>
/// <param name="r">DataRow from which read.</param>
/// <returns>Generated dynamic object.</returns>
public static dynamic RowToDynamicUpper(this DataRow r)
{
dynamic e = new ExpandoObject();
var d = e as IDictionary<string, object>;
int len = r.Table.Columns.Count;
for (int i = 0; i < len; i++)
d.Add(r.Table.Columns[i].ColumnName.ToUpper(), r.IsNull(i) ? null : r[i]);
return e;
}
/// <summary>Convert reader row into dynamic object.</summary>
/// <param name="r">Reader from which read.</param>
/// <returns>Generated dynamic object.</returns>
public static dynamic RowToDynamic(this IDataReader r)
{
dynamic e = new ExpandoObject();
var d = e as IDictionary<string, object>;
int c = r.FieldCount;
for (int i = 0; i < c; i++)
try
{
d.Add(r.GetName(i), r.IsDBNull(i) ? null : r[i]);
}
catch (ArgumentException argex)
{
throw new ArgumentException(
string.Format("Field '{0}' is defined more than once in a query.", r.GetName(i)), "Column name or alias", argex);
}
return e;
}
/// <summary>Turns the object into a Dictionary.</summary>
/// <param name="o">Object to convert.</param>
/// <returns>Resulting dictionary.</returns>
public static IDictionary<string, object> ToDictionary(this ExpandoObject o)
{
return (IDictionary<string, object>)o;
}
/// <summary>Turns the object into a Dictionary.</summary>
/// <param name="o">Object to convert.</param>
/// <returns>Resulting dictionary.</returns>
public static IDictionary<string, object> ToDictionary(this object o)
{
return o is IDictionary<string, object> ?
(IDictionary<string, object>)o :
(IDictionary<string, object>)o.ToDynamic();
}
#endregion Dynamic extensions
#region Type extensions
/// <summary>Check if type is anonymous. </summary>
/// <param name="type">Type to test.</param>
/// <returns>Returns <c>true</c> if type is anonymous.</returns>
public static bool IsAnonymous(this Type type)
{
// HACK: The only way to detect anonymous types right now.
return Attribute.IsDefined(type, typeof(CompilerGeneratedAttribute), false)
&& type.IsGenericType
&& (type.Name.Contains("AnonymousType") || type.Name.Contains("AnonType"))
&& (type.Name.StartsWith("<>") || type.Name.StartsWith("VB$"))
&& (type.Attributes & TypeAttributes.NotPublic) == TypeAttributes.NotPublic;
}
/// <summary>Check if type implements IEnumerable&lt;&gt; interface.</summary>
/// <param name="type">Type to check.</param>
/// <returns>Returns <c>true</c> if it does.</returns>
public static bool IsGenericEnumerable(this Type type)
{
return type.IsGenericType &&
typeof(IEnumerable<>).IsAssignableFrom(type.GetGenericTypeDefinition());
}
/// <summary>Check if type implements IEnumerable&lt;&gt; interface.</summary>
/// <param name="type">Type to check.</param>
/// <returns>Returns <c>true</c> if it does.</returns>
public static bool IsNullableType(this Type type)
{
Type generic = type.IsGenericType ? type.GetGenericTypeDefinition() : null;
if (generic != null && generic.Equals(typeof(Nullable<>)) && type.IsClass)
return true;
return false;
}
/// <summary>Check if type is collection of any kind.</summary>
/// <param name="type">Type to check.</param>
/// <returns>Returns <c>true</c> if it is.</returns>
public static bool IsCollection(this Type type)
{
if (!type.IsArray)
return type.IsGenericEnumerable();
return true;
}
/// <summary>Check if type is collection of value types like int.</summary>
/// <param name="type">Type to check.</param>
/// <returns>Returns <c>true</c> if it is.</returns>
public static bool IsCollectionOfValueTypes(this Type type)
{
if (type.IsArray)
return type.GetElementType().IsValueType;
else
{
if (type.IsGenericType)
{
Type[] gt = type.GetGenericArguments();
return (gt.Length == 1) && gt[0].IsValueType;
}
}
return false;
}
#endregion Type extensions
#region IDictionary extensions
/// <summary>Gets the value associated with the specified key.</summary>
/// <typeparam name="TKey">The type of keys in the dictionary.</typeparam>
/// <typeparam name="TValue">The type of values in the dictionary.</typeparam>
/// <param name="dict">Dictionary to probe.</param>
/// <param name="key">The key whose value to get.</param>
/// <returns>Nullable type containing value or null if key was not found.</returns>
public static TValue? TryGetNullable<TKey, TValue>(this IDictionary<TKey, TValue> dict, TKey key) where TValue : struct
{
TValue val;
if (key != null && dict.TryGetValue(key, out val))
return val;
return null;
}
/// <summary>Gets the value associated with the specified key.</summary>
/// <typeparam name="TKey">The type of keys in the dictionary.</typeparam>
/// <typeparam name="TValue">The type of values in the dictionary.</typeparam>
/// <param name="dict">Dictionary to probe.</param>
/// <param name="key">The key whose value to get.</param>
/// <returns>Instance of object or null if not found.</returns>
public static TValue TryGetValue<TKey, TValue>(this IDictionary<TKey, TValue> dict, TKey key) where TValue : class
{
TValue val;
if (key != null && dict.TryGetValue(key, out val))
return val;
return default(TValue);
}
/// <summary>Adds element to dictionary and returns added value.</summary>
/// <typeparam name="TKey">The type of keys in the dictionary.</typeparam>
/// <typeparam name="TValue">The type of values in the dictionary.</typeparam>
/// <param name="dict">Dictionary to which add value.</param>
/// <param name="key">The key under which value value will be added.</param>
/// <param name="value">Value to add.</param>
/// <returns>Instance of object or null if not found.</returns>
public static TValue AddAndPassValue<TKey, TValue>(this IDictionary<TKey, TValue> dict, TKey key, TValue value)
{
dict.Add(key, value);
return value;
}
#endregion IDictionary extensions
#region Mapper extensions
/// <summary>MapEnumerable object enumerator into specified type.</summary>
/// <typeparam name="T">Type to which columnMap results.</typeparam>
/// <param name="enumerable">Source enumerator.</param>
/// <returns>Enumerator of specified type.</returns>
public static IEnumerable<T> MapEnumerable<T>(this IEnumerable<object> enumerable)
{
var mapper = DynamicMapperCache.GetMapper<T>();
if (mapper == null)
throw new InvalidOperationException("Type can't be mapped for unknown reason.");
foreach (var item in enumerable)
yield return (T)mapper.Create(item);
}
/// <summary>MapEnumerable object item into specified type.</summary>
/// <typeparam name="T">Type to which columnMap results.</typeparam>
/// <param name="item">Source object.</param>
/// <returns>Item of specified type.</returns>
public static T Map<T>(this object item)
{
var mapper = DynamicMapperCache.GetMapper<T>();
if (mapper == null)
throw new InvalidOperationException("Type can't be mapped for unknown reason.");
return (T)mapper.Create(item);
}
/// <summary>Fill object of specified type with data from source object.</summary>
/// <typeparam name="T">Type to which columnMap results.</typeparam>
/// <param name="item">Item to which columnMap data.</param>
/// <param name="source">Item from which extract data.</param>
/// <returns>Filled item.</returns>
public static T Fill<T>(this T item, object source)
{
var mapper = DynamicMapperCache.GetMapper<T>();
if (mapper == null)
throw new InvalidOperationException("Type can't be mapped for unknown reason.");
mapper.Map(item, source);
return item;
}
/// <summary>MapEnumerable object enumerator into specified type.</summary>
/// <param name="enumerable">Source enumerator.</param>
/// <param name="type">Type to which columnMap results.</param>
/// <returns>Enumerator of specified type.</returns>
public static IEnumerable<object> MapEnumerable(this IEnumerable<object> enumerable, Type type)
{
var mapper = DynamicMapperCache.GetMapper(type);
if (mapper == null)
throw new InvalidOperationException("Type can't be mapped for unknown reason.");
foreach (var item in enumerable)
yield return mapper.Create(item);
}
/// <summary>MapEnumerable object item into specified type.</summary>
/// <param name="item">Source object.</param>
/// <param name="type">Type to which columnMap results.</param>
/// <returns>Item of specified type.</returns>
public static object Map(this object item, Type type)
{
var mapper = DynamicMapperCache.GetMapper(type);
if (mapper == null)
throw new InvalidOperationException("Type can't be mapped for unknown reason.");
return mapper.Create(item);
}
/// <summary>Converts the elements of an <see cref="System.Collections.IEnumerable"/>
/// to the specified type.</summary>
/// <typeparam name="T">The type to convert the elements of source to.</typeparam>
/// <param name="enumerator">The <see cref="System.Collections.IEnumerable"/> that
/// contains the elements to be converted.</param>
/// <returns>An enumerator that contains each element of
/// the source sequence converted to the specified type.</returns>
/// <exception cref="System.ArgumentNullException">Thrown when
/// <c>source</c> is null.</exception>
/// <exception cref="System.InvalidCastException">An element in the
/// sequence cannot be cast to type <c>T</c> or <c>enumerator</c>
/// is not <see cref="System.Collections.IEnumerable"/>.</exception>
public static IEnumerable<T> CastEnumerable<T>(this object enumerator)
{
return (enumerator as System.Collections.IEnumerable).Cast<T>();
}
#endregion Mapper extensions
#region TryParse extensions
#if !DYNAMORM_OMMIT_TRYPARSE
/// <summary>Generic try parse.</summary>
/// <typeparam name="T">Type to parse to.</typeparam>
/// <param name="value">Value to parse.</param>
/// <param name="handler">Handler of a try parse method.</param>
/// <returns>Returns <c>true</c> if conversion was successful.</returns>
public static T? TryParse<T>(this string value, TryParseHandler<T> handler) where T : struct
{
if (String.IsNullOrEmpty(value))
return null;
T result;
if (handler(value, out result))
return result;
return null;
}
/// <summary>Generic try parse with default value.</summary>
/// <typeparam name="T">Type to parse to.</typeparam>
/// <param name="value">Value to parse.</param>
/// <param name="defaultValue">Default value of a result.</param>
/// <param name="handler">Handler of a try parse method.</param>
/// <returns>Returns <c>true</c> if conversion was successful.</returns>
public static T TryParseDefault<T>(this string value, T defaultValue, TryParseHandler<T> handler)
{
if (String.IsNullOrEmpty(value))
return defaultValue;
T result;
if (handler(value, out result))
return result;
return defaultValue;
}
/// <summary>Delegate fro try parse function of a type.</summary>
/// <typeparam name="T">Type which implements this function.</typeparam>
/// <param name="value">Value to parse.</param>
/// <param name="result">Resulting value.</param>
/// <returns>Returns <c>true</c> if conversion was successful.</returns>
public delegate bool TryParseHandler<T>(string value, out T result);
#endif
#endregion TryParse extensions
#region Coalesce - besicaly not an extensions
/// <summary>Select first not null value.</summary>
/// <typeparam name="T">Type to return.</typeparam>
/// <param name="vals">Values to check.</param>
/// <returns>First not null or default value.</returns>
public static T Coalesce<T>(params T[] vals) where T : class
{
return vals.FirstOrDefault(v => v != null);
}
/// <summary>Select first not null value.</summary>
/// <typeparam name="T">Type to return.</typeparam>
/// <param name="vals">Values to check.</param>
/// <returns>First not null or default value.</returns>
public static T? CoalesceNullable<T>(params T?[] vals) where T : struct
{
return vals.FirstOrDefault(v => v != null);
}
#endregion Coalesce - besicaly not an extensions
}
/// <summary>Dynamic query exception.</summary>
public class DynamicQueryException : Exception, ISerializable
{
/// <summary>Gets the dumped command which failed.</summary>
public string Command { get; private set; }
/// <summary>Initializes a new instance of the
/// <see cref="DynamicQueryException"/> class.</summary>
/// <param name="command">The command which failed.</param>
public DynamicQueryException(IDbCommand command = null)
: base("Error executing command.")
{
if (command != null)
{
var sb = new StringBuilder();
command.Dump(sb);
Command = sb.ToString();
}
}
/// <summary>Initializes a new instance of the
/// <see cref="DynamicQueryException"/> class.</summary>
/// <param name="message">The message.</param>
/// <param name="command">The command which failed.</param>
public DynamicQueryException(string message, IDbCommand command = null)
: base(message)
{
SetCommand(command);
}
/// <summary>Initializes a new instance of the
/// <see cref="DynamicQueryException"/> class.</summary>
/// <param name="innerException">The inner exception.</param>
/// <param name="command">The command which failed.</param>
public DynamicQueryException(Exception innerException, IDbCommand command = null)
: base("Error executing command.", innerException)
{
SetCommand(command);
}
/// <summary>Initializes a new instance of the
/// <see cref="DynamicQueryException"/> class.</summary>
/// <param name="message">The message.</param>
/// <param name="innerException">The inner exception.</param>
/// <param name="command">The command which failed.</param>
public DynamicQueryException(string message, Exception innerException, IDbCommand command = null)
: base(message, innerException)
{
SetCommand(command);
}
/// <summary>Initializes a new instance of the
/// <see cref="DynamicQueryException"/> class.</summary>
/// <param name="info">The <see cref="T:System.Runtime.Serialization.SerializationInfo" />
/// that holds the serialized object data about the exception being thrown.</param>
/// <param name="context">The <see cref="T:System.Runtime.Serialization.StreamingContext" />
/// that contains contextual information about the source or destination.</param>
public DynamicQueryException(SerializationInfo info, StreamingContext context)
: base(info, context)
{
Command = info.GetString("Command");
}
/// <summary>When overridden in a derived class, sets the
/// <see cref="T:System.Runtime.Serialization.SerializationInfo" />
/// with information about the exception.</summary>
/// <param name="info">The <see cref="T:System.Runtime.Serialization.SerializationInfo" />
/// that holds the serialized object data about the exception being thrown.</param>
/// <param name="context">The <see cref="T:System.Runtime.Serialization.StreamingContext" />
/// that contains contextual information about the source or destination.</param>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Read="*AllFiles*" PathDiscovery="*AllFiles*" />
/// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="SerializationFormatter" />
/// </PermissionSet>
public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
base.GetObjectData(info, context);
if (!string.IsNullOrEmpty(Command))
info.AddValue("Command", Command);
}
private void SetCommand(IDbCommand command)
{
if (command != null && (!(command is DynamicCommand) || ((command is DynamicCommand) && !(command as DynamicCommand).IsDisposed)))
{
var sb = new StringBuilder();
command.Dump(sb);
Command = sb.ToString();
}
}
}
/// <summary>Stores information about column from database schema.</summary>
public struct DynamicSchemaColumn
{
/// <summary>Gets or sets column name.</summary>
public string Name { get; set; }
/// <summary>Gets or sets column type.</summary>
public DbType Type { get; set; }
/// <summary>Gets or sets a value indicating whether column is a key.</summary>
public bool IsKey { get; set; }
/// <summary>Gets or sets a value indicating whether column should have unique value.</summary>
public bool IsUnique { get; set; }
/// <summary>Gets or sets column size.</summary>
public int Size { get; set; }
/// <summary>Gets or sets column precision.</summary>
public byte Precision { get; set; }
/// <summary>Gets or sets column scale.</summary>
public byte Scale { get; set; }
}
#if !DYNAMORM_OMMIT_OLDSYNTAX
/// <summary>Dynamic table is a simple ORM using dynamic objects.</summary>
/// <example>
/// <para>Assume that we have a table representing Users class.</para>
/// <para>
/// <para>Let's take a look at <c>Query</c> possibilities. Assume we want
/// to get enumerator for all records in database, mapped to our class
/// instead of dynamic type we can use following syntax.</para>
/// <para>Approach first. Use dynamic <c>Query</c> method and just set type
/// then just cast it to user class. Remember that you must cast result
/// of <c>Query</c>to <c>IEnumerable&lt;object&gt;</c>. because from
/// point of view of runtime you are operating on <c>object</c> type.</para>
/// <code>(db.Table&lt;User&gt;().Query(type: typeof(User)) as IEnumerable&lt;object&gt;).Cast&lt;User&gt;();</code>
/// <para>Second approach is similar. We ask database using dynamic
/// <c>Query</c> method. The difference is that we use extension method of
/// <c>IEnumerable&lt;object&gt;</c> (to which we must cast to) to map
/// object.</para>
/// <code>(db.Table&lt;User&gt;().Query(columns: "*") as IEnumerable&lt;object&gt;).MapEnumerable&lt;User&gt;();</code>
/// You can also use generic approach. But be careful this method is currently available thanks to framework hack.
/// <code>(db.Table&lt;User&gt;().Query&lt;User&gt;() as IEnumerable&lt;object&gt;).Cast&lt;User&gt;()</code>
/// <para>Another approach uses existing methods, but still requires a
/// cast, because <c>Query</c> also returns dynamic object enumerator.</para>
/// <code>(db.Table&lt;User&gt;().Query().Execute() as IEnumerable&lt;object&gt;).MapEnumerable&lt;User&gt;();</code>
/// </para>
/// <para>Below you can find various invocations of dynamic and non dynamic
/// methods of this class. <c>x</c> variable is a class instance.
/// First various selects:</para>
/// <code>x.Count(columns: "id");</code>
/// <code>x.Count(last: new DynamicColumn
/// {
/// Operator = DynamicColumn.CompareOperator.In,
/// Value = new object[] { "Hendricks", "Goodwin", "Freeman" }.Take(3)
/// });</code>
/// <code>x.Count(last: new DynamicColumn
/// {
/// Operator = DynamicColumn.CompareOperator.In,
/// Value = new object[] { "Hendricks", "Goodwin", "Freeman" }
/// });</code>
/// <code>x.First(columns: "id").id;</code>
/// <code>x.Last(columns: "id").id;</code>
/// <code>x.Count(first: "Ori");</code>
/// <code>x.Min(columns: "id");</code>
/// <code>x.Max(columns: "id");</code>
/// <code>x.Avg(columns: "id");</code>
/// <code>x.Sum(columns: "id");</code>
/// <code>x.Scalar(columns: "first", id: 19);</code>
/// <code>x.Scalar(columns: "first:first:group_concat", id: new DynamicColumn { Operator = DynamicColumn.CompareOperator.Lt, Value = 20 });</code>
/// <code>x.Scalar(columns: "group_concat(first):first", id: new DynamicColumn { Operator = DynamicColumn.CompareOperator.Lt, Value = 20 });</code>
/// <code>var v = (x.Query(columns: "first,first:occurs:count", group: "first", order: ":desc:2") as IEnumerable&lt;dynamic&gt;).ToList();</code>
/// <code>x.Scalar(columns: @"length(""login""):len:avg");</code>
/// <code>x.Avg(columns: @"length(""email""):len");</code>
/// <code>x.Count(condition1:
/// new DynamicColumn()
/// {
/// ColumnName = "email",
/// Aggregate = "length",
/// Operator = DynamicColumn.CompareOperator.Gt,
/// Value = 27
/// });</code>
/// <code>var o = x.Single(columns: "id,first,last", id: 19);</code>
/// <code>x.Single(where: new DynamicColumn("id").Eq(100)).login;</code>
/// <code>x.Count(where: new DynamicColumn("id").Not(100));</code>
/// <code>x.Single(where: new DynamicColumn("login").Like("Hoyt.%")).id;</code>
/// <code>x.Count(where: new DynamicColumn("login").NotLike("Hoyt.%"));</code>
/// <code>x.Count(where: new DynamicColumn("id").Greater(100));</code>
/// <code>x.Count(where: new DynamicColumn("id").GreaterOrEqual(100));</code>
/// <code>x.Count(where: new DynamicColumn("id").Less(100));</code>
/// <code>x.Count(where: new DynamicColumn("id").LessOrEqual(100));</code>
/// <code>x.Count(where: new DynamicColumn("id").Between(75, 100));</code>
/// <code>x.Count(where: new DynamicColumn("id").In(75, 99, 100));</code>
/// <code>x.Count(where: new DynamicColumn("id").In(new[] { 75, 99, 100 }));</code>
/// Inserts:
/// <code>x.Insert(code: 201, first: "Juri", last: "Gagarin", email: "juri.gagarin@megacorp.com", quote: "bla, bla, bla");</code>
/// <code>x.Insert(values: new { code = 202, first = "Juri", last = "Gagarin", email = "juri.gagarin@megacorp.com", quote = "bla, bla, bla" });</code>
/// <code>x.Insert(values: new Users
/// {
/// Id = u.Max(columns: "id") + 1,
/// Code = "203",
/// First = "Juri",
/// Last = "Gagarin",
/// Email = "juri.gagarin@megacorp.com",
/// Quote = "bla, bla, bla"
/// });</code>
/// <code>x.Insert(values: new users
/// {
/// id = u.Max(columns: "id") + 1,
/// code = "204",
/// first = "Juri",
/// last = "Gagarin",
/// email = "juri.gagarin@megacorp.com",
/// quote = "bla, bla, bla"
/// });</code>
/// <code>x.Update(id: 1, code: 201, first: "Juri", last: "Gagarin", email: "juri.gagarin@megacorp.com", quote: "bla, bla, bla");</code>
/// <code>x.Update(update: new { id = 2, code = 202, first = "Juri", last = "Gagarin", email = "juri.gagarin@megacorp.com", quote = "bla, bla, bla" });</code>
/// Updates:
/// <code>x.Update(update: new Users
/// {
/// Id = 3,
/// Code = "203",
/// First = "Juri",
/// Last = "Gagarin",
/// Email = "juri.gagarin@megacorp.com",
/// Quote = "bla, bla, bla"
/// });</code>
/// <code>x.Update(update: new users
/// {
/// id = 4,
/// code = "204",
/// first = "Juri",
/// last = "Gagarin",
/// email = "juri.gagarin@megacorp.com",
/// quote = "bla, bla, bla"
/// });</code>
/// <code>x.Update(values: new { code = 205, first = "Juri", last = "Gagarin", email = "juri.gagarin@megacorp.com", quote = "bla, bla, bla" }, where: new { id = 5 });</code>
/// <code>x.Update(values: new Users
/// {
/// Id = 6,
/// Code = "206",
/// First = "Juri",
/// Last = "Gagarin",
/// Email = "juri.gagarin@megacorp.com",
/// Quote = "bla, bla, bla"
/// }, id: 6);</code>
/// <code>x.Update(values: new users
/// {
/// id = 7,
/// code = "207",
/// first = "Juri",
/// last = "Gagarin",
/// email = "juri.gagarin@megacorp.com",
/// quote = "bla, bla, bla"
/// }, id: 7);</code>
/// Delete:
/// <code>x.Delete(code: 10);</code>
/// <code>x.Delete(delete: new { id = 11, code = 11, first = "Juri", last = "Gagarin", email = "juri.gagarin@megacorp.com", quote = "bla, bla, bla" });</code>
/// <code>x.Delete(delete: new Users
/// {
/// Id = 12,
/// Code = "12",
/// First = "Juri",
/// Last = "Gagarin",
/// Email = "juri.gagarin@megacorp.com",
/// Quote = "bla, bla, bla"
/// });</code>
/// <code>x.Delete(delete: new users
/// {
/// id = 13,
/// code = "13",
/// first = "Juri",
/// last = "Gagarin",
/// email = "juri.gagarin@megacorp.com",
/// quote = "bla, bla, bla"
/// });</code>
/// <code>x.Delete(where: new { id = 14, code = 14 });</code>
/// </example>
public class DynamicTable : DynamicObject, IExtendedDisposable, ICloneable
{
private static HashSet<string> _allowedCommands = new HashSet<string>
{
"Insert", "Update", "Delete",
"Query", "Single", "Where",
"First", "Last", "Get",
"Count", "Sum", "Avg",
"Min", "Max", "Scalar"
};
/// <summary>Gets dynamic database.</summary>
internal DynamicDatabase Database { get; private set; }
/// <summary>Gets type of table (for coning and schema building).</summary>
internal Type TableType { get; private set; }
/// <summary>Gets name of table.</summary>
public virtual string TableName { get; private set; }
/// <summary>Gets name of owner.</summary>
public virtual string OwnerName { get; private set; }
/// <summary>Gets full name of table containing owner and table name.</summary>
public virtual string FullName
{
get
{
return string.IsNullOrEmpty(TableName) ? null : string.IsNullOrEmpty(OwnerName) ?
Database.DecorateName(TableName) :
string.Format("{0}.{1}", Database.DecorateName(OwnerName), Database.DecorateName(TableName));
}
}
/// <summary>Gets table schema.</summary>
/// <remarks>If database doesn't support schema, only key columns are listed here.</remarks>
public virtual Dictionary<string, DynamicSchemaColumn> Schema { get; private set; }
private DynamicTable()
{
}
/// <summary>Initializes a new instance of the <see cref="DynamicTable" /> class.</summary>
/// <param name="database">Database and connection management.</param>
/// <param name="table">Table name.</param>
/// <param name="owner">Owner of the table.</param>
/// <param name="keys">Override keys in schema.</param>
public DynamicTable(DynamicDatabase database, string table = "", string owner = "", string[] keys = null)
{
IsDisposed = false;
Database = database;
TableName = Database.StripName(table);
OwnerName = Database.StripName(owner);
TableType = null;
BuildAndCacheSchema(keys);
}
/// <summary>Initializes a new instance of the <see cref="DynamicTable" /> class.</summary>
/// <param name="database">Database and connection management.</param>
/// <param name="type">Type describing table.</param>
/// <param name="keys">Override keys in schema.</param>
public DynamicTable(DynamicDatabase database, Type type, string[] keys = null)
{
if (type == null)
throw new ArgumentNullException("type", "Type can't be null.");
IsDisposed = false;
Database = database;
TableType = type;
var mapper = DynamicMapperCache.GetMapper(type);
if (mapper != null)
{
TableName = mapper.Table == null || string.IsNullOrEmpty(mapper.Table.Name) ?
type.Name : mapper.Table.Name;
OwnerName = mapper.Table == null || string.IsNullOrEmpty(mapper.Table.Name) ?
type.Name : mapper.Table.Name;
}
BuildAndCacheSchema(keys);
}
#region Schema
private void BuildAndCacheSchema(string[] keys)
{
Dictionary<string, DynamicSchemaColumn> schema = null;
schema = Database.GetSchema(TableType) ??
Database.GetSchema(TableName);
#region Fill currrent table schema
if (keys == null && TableType != null)
{
var mapper = DynamicMapperCache.GetMapper(TableType);
if (mapper != null)
{
var k = mapper.ColumnsMap.Where(p => p.Value.Column != null && p.Value.Column.IsKey).Select(p => p.Key);
if (k.Count() > 0)
keys = k.ToArray();
}
}
if (schema != null)
{
if (keys == null)
Schema = new Dictionary<string, DynamicSchemaColumn>(schema);
else
{
// TODO: Make this.... nicer
List<string> ks = keys.Select(k => k.ToLower()).ToList();
Schema = schema.ToDictionary(k => k.Key, (v) =>
{
DynamicSchemaColumn dsc = v.Value;
dsc.IsKey = ks.Contains(v.Key);
return dsc;
});
}
}
#endregion Fill currrent table schema
#region Build ad-hock schema
if (keys != null && Schema == null)
{
Schema = keys.Select(k => k.ToLower()).ToList()
.ToDictionary(k => k, k => new DynamicSchemaColumn { Name = k, IsKey = true });
}
#endregion Build ad-hock schema
}
#endregion Schema
#region Basic Queries
/// <summary>Enumerate the reader and yield the result.</summary>
/// <param name="sql">SQL query containing numbered parameters in format provided by
/// <see cref="DynamicDatabase.GetParameterName(object)"/> methods. Also names should be formatted with
/// <see cref="DynamicDatabase.DecorateName(string)"/> method.</param>
/// <param name="args">Arguments (parameters).</param>
/// <returns>Enumerator of objects expanded from query.</returns>
public virtual IEnumerable<dynamic> Query(string sql, params object[] args)
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
using (var rdr = cmd
.SetCommand(sql, args)
.ExecuteReader())
while (rdr.Read())
{
dynamic val = null;
// Work around to avoid yield being in try...catch block:
// http://stackoverflow.com/questions/346365/why-cant-yield-return-appear-inside-a-try-block-with-a-catch
try
{
val = rdr.RowToDynamic();
}
catch (ArgumentException argex)
{
var sb = new StringBuilder();
cmd.Dump(sb);
throw new ArgumentException(string.Format("{0}{1}{2}", argex.Message, Environment.NewLine, sb),
argex.InnerException.NullOr(a => a, argex));
}
yield return val;
}
}
/// <summary>Enumerate the reader and yield the result.</summary>
/// <param name="builder">Command builder.</param>
/// <returns>Enumerator of objects expanded from query.</returns>
public virtual IEnumerable<dynamic> Query(IDynamicQueryBuilder builder)
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
using (var rdr = cmd
.SetCommand(builder)
.ExecuteReader())
while (rdr.Read())
{
dynamic val = null;
// Work around to avoid yield being in try...catch block:
// http://stackoverflow.com/questions/346365/why-cant-yield-return-appear-inside-a-try-block-with-a-catch
try
{
val = rdr.RowToDynamic();
}
catch (ArgumentException argex)
{
var sb = new StringBuilder();
cmd.Dump(sb);
throw new ArgumentException(string.Format("{0}{1}{2}", argex.Message, Environment.NewLine, sb),
argex.InnerException.NullOr(a => a, argex));
}
yield return val;
}
}
/// <summary>Create new <see cref="DynamicSelectQueryBuilder"/>.</summary>
/// <returns>New <see cref="DynamicSelectQueryBuilder"/> instance.</returns>
public virtual IDynamicSelectQueryBuilder Query()
{
var builder = new DynamicSelectQueryBuilder(this.Database);
var name = this.FullName;
if (!string.IsNullOrEmpty(name))
builder.From(x => name);
return builder;
}
/// <summary>Returns a single result.</summary>
/// <param name="sql">SQL query containing numbered parameters in format provided by
/// <see cref="DynamicDatabase.GetParameterName(object)"/> methods. Also names should be formatted with
/// <see cref="DynamicDatabase.DecorateName(string)"/> method.</param>
/// <param name="args">Arguments (parameters).</param>
/// <returns>Result of a query.</returns>
public virtual object Scalar(string sql, params object[] args)
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
{
return cmd
.SetCommand(sql).AddParameters(Database, args)
.ExecuteScalar();
}
}
/// <summary>Returns a single result.</summary>
/// <param name="builder">Command builder.</param>
/// <returns>Result of a query.</returns>
public virtual object Scalar(IDynamicQueryBuilder builder)
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
{
return cmd
.SetCommand(builder)
.ExecuteScalar();
}
}
/// <summary>Execute stored procedure.</summary>
/// <param name="procName">Name of stored procedure to execute.</param>
/// <param name="args">Arguments (parameters) in form of expando object.</param>
/// <returns>Number of affected rows.</returns>
public virtual int Procedure(string procName, ExpandoObject args = null)
{
if ((Database.Options & DynamicDatabaseOptions.SupportStoredProcedures) != DynamicDatabaseOptions.SupportStoredProcedures)
throw new InvalidOperationException("Database connection desn't support stored procedures.");
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
{
return cmd
.SetCommand(CommandType.StoredProcedure, procName).AddParameters(Database, args)
.ExecuteNonQuery();
}
}
/// <summary>Execute non query.</summary>
/// <param name="sql">SQL query containing numbered parameters in format provided by
/// <see cref="DynamicDatabase.GetParameterName(object)"/> methods. Also names should be formatted with
/// <see cref="DynamicDatabase.DecorateName(string)"/> method.</param>
/// <param name="args">Arguments (parameters).</param>
/// <returns>Number of affected rows.</returns>
public virtual int Execute(string sql, params object[] args)
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
{
return cmd
.SetCommand(sql).AddParameters(Database, args)
.ExecuteNonQuery();
}
}
/// <summary>Execute non query.</summary>
/// <param name="builder">Command builder.</param>
/// <returns>Number of affected rows.</returns>
public virtual int Execute(IDynamicQueryBuilder builder)
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
{
return cmd
.SetCommand(builder)
.ExecuteNonQuery();
}
}
/// <summary>Execute non query.</summary>
/// <param name="builers">Command builders.</param>
/// <returns>Number of affected rows.</returns>
public virtual int Execute(IDynamicQueryBuilder[] builers)
{
int ret = 0;
using (var con = Database.Open())
{
using (var trans = con.BeginTransaction())
{
foreach (var builder in builers)
{
using (var cmd = con.CreateCommand())
{
ret += cmd
.SetCommand(builder)
.ExecuteNonQuery();
}
}
trans.Commit();
}
}
return ret;
}
#endregion Basic Queries
#region Insert
/// <summary>Create new <see cref="DynamicInsertQueryBuilder"/>.</summary>
/// <returns>New <see cref="DynamicInsertQueryBuilder"/> instance.</returns>
public dynamic Insert()
{
return new DynamicProxy<IDynamicInsertQueryBuilder>(new DynamicInsertQueryBuilder(this.Database, this.FullName));
}
/// <summary>Adds a record to the database. You can pass in an Anonymous object, an <see cref="ExpandoObject"/>,
/// A regular old POCO, or a NameValueCollection from a Request.Form or Request.QueryString.</summary>
/// <param name="o">Anonymous object, an <see cref="ExpandoObject"/>, a regular old POCO, or a NameValueCollection
/// from a Request.Form or Request.QueryString, containing fields to update.</param>
/// <returns>Number of updated rows.</returns>
public virtual int Insert(object o)
{
return Insert()
.Insert(o)
.Execute();
}
#endregion Insert
#region Update
/// <summary>Create new <see cref="DynamicUpdateQueryBuilder"/>.</summary>
/// <returns>New <see cref="DynamicUpdateQueryBuilder"/> instance.</returns>
public dynamic Update()
{
return new DynamicProxy<IDynamicUpdateQueryBuilder>(new DynamicUpdateQueryBuilder(this.Database, this.FullName));
}
/// <summary>Updates a record in the database. You can pass in an Anonymous object, an ExpandoObject,
/// a regular old POCO, or a NameValueCollection from a Request.Form or Request.QueryString.</summary>
/// <param name="o">Anonymous object, an ExpandoObject, a regular old POCO, or a NameValueCollection
/// from a Request.Form or Request.QueryString, containing fields to update.</param>
/// <param name="key">Anonymous object, an <see cref="ExpandoObject"/>, a regular old POCO, or a NameValueCollection
/// from a Request.Form or Request.QueryString, containing fields with conditions.</param>
/// <returns>Number of updated rows.</returns>
public virtual int Update(object o, object key)
{
return Update()
.Values(o)
.Where(key)
.Execute();
}
/// <summary>Updates a record in the database using schema. You can pass in an Anonymous object, an ExpandoObject,
/// a regular old POCO, or a NameValueCollection from a Request.Form or Request.QueryString.</summary>
/// <param name="o">Anonymous object, an <see cref="ExpandoObject"/>, a regular old POCO, or a NameValueCollection
/// from a Request.Form or Request.QueryString, containing fields to update and conditions.</param>
/// <returns>Number of updated rows.</returns>
public virtual int Update(object o)
{
return Update()
.Update(o)
.Execute();
}
#endregion Update
#region Delete
/// <summary>Create new <see cref="DynamicDeleteQueryBuilder"/>.</summary>
/// <returns>New <see cref="DynamicDeleteQueryBuilder"/> instance.</returns>
public dynamic Delete()
{
return new DynamicProxy<IDynamicDeleteQueryBuilder>(new DynamicDeleteQueryBuilder(this.Database, this.FullName));
}
/// <summary>Removes a record from the database. You can pass in an Anonymous object, an <see cref="ExpandoObject"/>,
/// A regular old POCO, or a NameValueCollection from a Request.Form or Request.QueryString.</summary>
/// <param name="o">Anonymous object, an <see cref="ExpandoObject"/>, a regular old POCO, or a NameValueCollection
/// from a Request.Form or Request.QueryString, containing fields with where conditions.</param>
/// <param name="schema">If <c>true</c> use schema to determine key columns and ignore those which
/// aren't keys.</param>
/// <returns>Number of updated rows.</returns>
public virtual int Delete(object o, bool schema = true)
{
return Delete()
.Where(o, schema)
.Execute();
}
#endregion Delete
#region Universal Dynamic Invoker
/// <summary>This is where the magic begins.</summary>
/// <param name="binder">Binder to invoke.</param>
/// <param name="args">Binder arguments.</param>
/// <param name="result">Binder invoke result.</param>
/// <returns>Returns <c>true</c> if invoke was performed.</returns>
public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
{
// parse the method
var info = binder.CallInfo;
// Get generic types
var types = binder.GetGenericTypeArguments();
// accepting named args only... SKEET!
if (info.ArgumentNames.Count != args.Length)
throw new InvalidOperationException("Please use named arguments for this type of query - the column name, orderby, columns, etc");
var op = binder.Name;
// Avoid strange things
if (!_allowedCommands.Contains(op))
throw new InvalidOperationException(string.Format("Dynamic method '{0}' is not supported.", op));
switch (op)
{
case "Insert":
result = DynamicInsert(args, info, types);
break;
case "Update":
result = DynamicUpdate(args, info, types);
break;
case "Delete":
result = DynamicDelete(args, info, types);
break;
default:
result = DynamicQuery(args, info, op, types);
break;
}
return true;
}
private object DynamicInsert(object[] args, CallInfo info, IList<Type> types)
{
var builder = new DynamicInsertQueryBuilder(this.Database);
if (types != null && types.Count == 1)
HandleTypeArgument<DynamicInsertQueryBuilder>(null, info, ref types, builder, 0);
if (!string.IsNullOrEmpty(this.TableName) && builder.Tables.Count == 0)
builder.Table(this.TableName, this.Schema);
// loop the named args - see if we have order, columns and constraints
if (info.ArgumentNames.Count > 0)
{
for (int i = 0; i < args.Length; i++)
{
var fullName = info.ArgumentNames[i];
var name = fullName.ToLower();
switch (name)
{
case "table":
if (args[i] is string)
builder.Table(args[i].ToString());
else goto default;
break;
case "values":
builder.Insert(args[i]);
break;
case "type":
if (types == null || types.Count == 0)
HandleTypeArgument<DynamicInsertQueryBuilder>(args, info, ref types, builder, i);
else goto default;
break;
default:
builder.Insert(fullName, args[i]);
break;
}
}
}
// Execute
return Execute(builder);
}
private object DynamicUpdate(object[] args, CallInfo info, IList<Type> types)
{
var builder = new DynamicUpdateQueryBuilder(this.Database);
if (types != null && types.Count == 1)
HandleTypeArgument<DynamicUpdateQueryBuilder>(null, info, ref types, builder, 0);
if (!string.IsNullOrEmpty(this.TableName) && builder.Tables.Count == 0)
builder.Table(this.TableName, this.Schema);
// loop the named args - see if we have order, columns and constraints
if (info.ArgumentNames.Count > 0)
{
for (int i = 0; i < args.Length; i++)
{
var fullName = info.ArgumentNames[i];
var name = fullName.ToLower();
switch (name)
{
case "table":
if (args[i] is string)
builder.Table(args[i].ToString());
else goto default;
break;
case "update":
builder.Update(args[i]);
break;
case "values":
builder.Values(args[i]);
break;
case "where":
builder.Where(args[i]);
break;
case "type":
if (types == null || types.Count == 0)
HandleTypeArgument(args, info, ref types, builder, i);
else goto default;
break;
default:
builder.Update(fullName, args[i]);
break;
}
}
}
// Execute
return Execute(builder);
}
private object DynamicDelete(object[] args, CallInfo info, IList<Type> types)
{
var builder = new DynamicDeleteQueryBuilder(this.Database);
if (types != null && types.Count == 1)
HandleTypeArgument<DynamicDeleteQueryBuilder>(null, info, ref types, builder, 0);
if (!string.IsNullOrEmpty(this.TableName) && builder.Tables.Count == 0)
builder.Table(this.TableName, this.Schema);
// loop the named args - see if we have order, columns and constraints
if (info.ArgumentNames.Count > 0)
{
for (int i = 0; i < args.Length; i++)
{
var fullName = info.ArgumentNames[i];
var name = fullName.ToLower();
switch (name)
{
case "table":
if (args[i] is string)
builder.Table(args[i].ToString());
else goto default;
break;
case "where":
builder.Where(args[i], false);
break;
case "delete":
builder.Where(args[i], true);
break;
case "type":
if (types == null || types.Count == 0)
HandleTypeArgument<DynamicDeleteQueryBuilder>(args, info, ref types, builder, i);
else goto default;
break;
default:
builder.Where(fullName, args[i]);
break;
}
}
}
// Execute
return Execute(builder);
}
private object DynamicQuery(object[] args, CallInfo info, string op, IList<Type> types)
{
object result;
var builder = new DynamicSelectQueryBuilder(this.Database);
if (types != null && types.Count == 1)
HandleTypeArgument<DynamicSelectQueryBuilder>(null, info, ref types, builder, 0);
if (!string.IsNullOrEmpty(this.TableName) && builder.Tables.Count == 0)
builder.From(x => this.TableName);
// loop the named args - see if we have order, columns and constraints
if (info.ArgumentNames.Count > 0)
{
for (int i = 0; i < args.Length; i++)
{
var fullName = info.ArgumentNames[i];
var name = fullName.ToLower();
// TODO: Make this nicer
switch (name)
{
case "order":
if (args[i] is string)
builder.OrderByColumn(((string)args[i]).Split(','));
else if (args[i] is string[])
builder.OrderByColumn(args[i] as string);
else if (args[i] is DynamicColumn[])
builder.OrderByColumn((DynamicColumn[])args[i]);
else if (args[i] is DynamicColumn)
builder.OrderByColumn((DynamicColumn)args[i]);
else goto default;
break;
case "group":
if (args[i] is string)
builder.GroupByColumn(((string)args[i]).Split(','));
else if (args[i] is string[])
builder.GroupByColumn(args[i] as string);
else if (args[i] is DynamicColumn[])
builder.GroupByColumn((DynamicColumn[])args[i]);
else if (args[i] is DynamicColumn)
builder.GroupByColumn((DynamicColumn)args[i]);
else goto default;
break;
case "columns":
{
var agregate = (op == "Sum" || op == "Max" || op == "Min" || op == "Avg" || op == "Count") ?
op.ToUpper() : null;
if (args[i] is string || args[i] is string[])
builder.SelectColumn((args[i] as String).NullOr(s => s.Split(','), args[i] as String[])
.Select(c =>
{
var col = DynamicColumn.ParseSelectColumn(c);
if (string.IsNullOrEmpty(col.Aggregate))
col.Aggregate = agregate;
return col;
}).ToArray());
else if (args[i] is DynamicColumn || args[i] is DynamicColumn[])
builder.SelectColumn((args[i] as DynamicColumn).NullOr(c => new DynamicColumn[] { c }, args[i] as DynamicColumn[])
.Select(c =>
{
if (string.IsNullOrEmpty(c.Aggregate))
c.Aggregate = agregate;
return c;
}).ToArray());
else goto default;
}
break;
case "where":
builder.Where(args[i]);
break;
case "table":
if (args[i] is string)
builder.From(x => args[i].ToString());
else goto default;
break;
case "type":
if (types == null || types.Count == 0)
HandleTypeArgument<DynamicSelectQueryBuilder>(args, info, ref types, builder, i);
else goto default;
break;
default:
builder.Where(fullName, args[i]);
break;
}
}
}
if (op == "Count" && !builder.HasSelectColumns)
{
result = Scalar(builder.Select(x => x.Count()));
if (result is long)
result = (int)(long)result;
}
else if (op == "Sum" || op == "Max" ||
op == "Min" || op == "Avg" || op == "Count")
{
if (!builder.HasSelectColumns)
throw new InvalidOperationException("You must select one column to agregate.");
result = Scalar(builder);
if (op == "Count" && result is long)
result = (int)(long)result;
else if (result == DBNull.Value)
result = null;
}
else
{
// build the SQL
var justOne = op == "First" || op == "Last" || op == "Get" || op == "Single";
// Be sure to sort by DESC on selected columns
/*if (op == "Last")
{
if (builder.Order.Count > 0)
foreach (var o in builder.Order)
o.Order = o.Order == DynamicColumn.SortOrder.Desc ?
DynamicColumn.SortOrder.Asc : DynamicColumn.SortOrder.Desc;
}*/
if (justOne && !(op == "Last"))
{
if ((Database.Options & DynamicDatabaseOptions.SupportLimitOffset) == DynamicDatabaseOptions.SupportLimitOffset)
builder.Limit(1);
else if ((Database.Options & DynamicDatabaseOptions.SupportTop) == DynamicDatabaseOptions.SupportTop)
builder.Top(1);
}
if (op == "Scalar")
{
if (!builder.HasSelectColumns)
throw new InvalidOperationException("You must select one column in scalar statement.");
result = Scalar(builder);
}
else
{
if (justOne)
{
if (op == "Last")
result = Query(builder).LastOrDefault(); // Last record fallback
else
result = Query(builder).FirstOrDefault(); // return a single record
}
else
result = Query(builder); // return lots
// MapEnumerable to specified result (still needs to be casted after that)
if (types != null)
{
if (types.Count == 1)
result = justOne ?
result.Map(types[0]) :
((IEnumerable<object>)result).MapEnumerable(types[0]);
// TODO: Dictionaries
}
}
}
return result;
}
private void HandleTypeArgument<T>(object[] args, CallInfo info, ref IList<Type> types, T builder, int i) where T : DynamicQueryBuilder
{
if (args != null)
{
if (args[i] is Type[])
types = new List<Type>((Type[])args[i]);
else if (args[i] is Type)
types = new List<Type>(new Type[] { (Type)args[i] });
}
if (types != null && types.Count == 1 && !info.ArgumentNames.Any(a => a.ToLower() == "table"))
builder.Table(types[0]);
}
#endregion Universal Dynamic Invoker
#region IExtendedDisposable Members
/// <summary>Performs application-defined tasks associated with
/// freeing, releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
// Lose reference but don't kill it.
if (Database != null)
{
Database.RemoveFromCache(this);
Database = null;
}
IsDisposed = true;
}
/// <summary>Gets a value indicating whether this instance is disposed.</summary>
public bool IsDisposed { get; private set; }
#endregion IExtendedDisposable Members
#region ICloneable Members
/// <summary>Creates a new object that is a copy of the current
/// instance.</summary>
/// <returns>A new object that is a copy of this instance.</returns>
public object Clone()
{
return new DynamicTable()
{
Database = this.Database,
Schema = this.Schema,
TableName = this.TableName,
TableType = this.TableType
};
}
#endregion ICloneable Members
}
#endif
/// <summary>Helper class to easy manage transaction.</summary>
public class DynamicTransaction : IDbTransaction, IExtendedDisposable
{
private DynamicDatabase _db;
private DynamicConnection _con;
private bool _singleTransaction;
private Action _disposed;
private bool _operational = false;
/// <summary>Initializes a new instance of the <see cref="DynamicTransaction" /> class.</summary>
/// <param name="db">Database connection manager.</param>
/// <param name="con">Active connection.</param>
/// <param name="singleTransaction">Are we using single transaction mode? I so... act correctly.</param>
/// <param name="il">One of the <see cref="System.Data.IsolationLevel"/> values.</param>
/// <param name="disposed">This action is invoked when transaction is disposed.</param>
internal DynamicTransaction(DynamicDatabase db, DynamicConnection con, bool singleTransaction, IsolationLevel? il, Action disposed)
{
_db = db;
_con = con;
_singleTransaction = singleTransaction;
_disposed = disposed;
lock (_db.SyncLock)
{
if (!_db.TransactionPool.ContainsKey(_con.Connection))
throw new InvalidOperationException("Can't create transaction using disposed connection.");
else if (_singleTransaction && _db.TransactionPool[_con.Connection].Count > 0)
_operational = false;
else
{
_db.TransactionPool[_con.Connection]
.Push(il.HasValue ? _con.Connection.BeginTransaction(il.Value) : _con.Connection.BeginTransaction());
_db.PoolStamp = DateTime.Now.Ticks;
_operational = true;
}
}
}
/// <summary>Commits the database transaction.</summary>
public void Commit()
{
lock (_db.SyncLock)
{
if (_operational)
{
var t = _db.TransactionPool.TryGetValue(_con.Connection);
if (t != null && t.Count > 0)
{
IDbTransaction trans = t.Pop();
_db.PoolStamp = DateTime.Now.Ticks;
trans.Commit();
trans.Dispose();
}
_operational = false;
}
}
}
/// <summary>Rolls back a transaction from a pending state.</summary>
public void Rollback()
{
lock (_db.SyncLock)
{
if (_operational)
{
var t = _db.TransactionPool.TryGetValue(_con.Connection);
if (t != null && t.Count > 0)
{
IDbTransaction trans = t.Pop();
_db.PoolStamp = DateTime.Now.Ticks;
trans.Rollback();
trans.Dispose();
}
_operational = false;
}
}
}
/// <summary>Gets connection object to associate with the transaction.</summary>
public IDbConnection Connection
{
get { return _con; }
}
/// <summary>Gets <see cref="System.Data.IsolationLevel"/> for this transaction.</summary>
public IsolationLevel IsolationLevel { get; private set; }
#region IExtendedDisposable Members
/// <summary>Performs application-defined tasks associated with
/// freeing, releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
Rollback();
if (_disposed != null)
_disposed();
}
/// <summary>Gets a value indicating whether this instance is disposed.</summary>
public bool IsDisposed { get { return !_operational; } }
#endregion IExtendedDisposable Members
}
namespace Builders
{
/// <summary>Dynamic delete query builder interface.</summary>
/// <remarks>This interface it publically available. Implementation should be hidden.</remarks>
public interface IDynamicDeleteQueryBuilder : IDynamicQueryBuilder
{
/// <summary>Execute this builder.</summary>
/// <returns>Result of an execution..</returns>
int Execute();
/// <summary>
/// Adds to the 'Where' clause the contents obtained from parsing the dynamic lambda expression given. The condition
/// is parsed to the appropriate syntax, where the specific customs virtual methods supported by the parser are used
/// as needed.
/// <para>- If several Where() methods are chained their contents are, by default, concatenated with an 'AND' operator.</para>
/// <para>- The 'And()' and 'Or()' virtual method can be used to concatenate with an 'OR' or an 'AND' operator, as in:
/// 'Where( x => x.Or( condition ) )'.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
IDynamicDeleteQueryBuilder Where(Func<dynamic, object> func);
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column with operator and value.</param>
/// <returns>Builder instance.</returns>
IDynamicDeleteQueryBuilder Where(DynamicColumn column);
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="op">Condition operator.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
IDynamicDeleteQueryBuilder Where(string column, DynamicColumn.CompareOperator op, object value);
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
IDynamicDeleteQueryBuilder Where(string column, object value);
/// <summary>Add where condition.</summary>
/// <param name="conditions">Set conditions as properties and values of an object.</param>
/// <param name="schema">If <c>true</c> use schema to determine key columns and ignore those which
/// aren't keys.</param>
/// <returns>Builder instance.</returns>
IDynamicDeleteQueryBuilder Where(object conditions, bool schema = false);
}
/// <summary>Dynamic insert query builder interface.</summary>
/// <remarks>This interface it publically available. Implementation should be hidden.</remarks>
public interface IDynamicInsertQueryBuilder : IDynamicQueryBuilder
{
/// <summary>Execute this builder.</summary>
/// <returns>Result of an execution..</returns>
int Execute();
/// <summary>
/// Specifies the columns to insert using the dynamic lambda expressions given. Each expression correspond to one
/// column, and can:
/// <para>- Resolve to a string, in this case a '=' must appear in the string.</para>
/// <para>- Resolve to a expression with the form: 'x => x.Column = Value'.</para>
/// </summary>
/// <param name="fn">The specifications.</param>
/// <param name="func">The specifications.</param>
/// <returns>This instance to permit chaining.</returns>
IDynamicInsertQueryBuilder Values(Func<dynamic, object> fn, params Func<dynamic, object>[] func);
/// <summary>Add insert fields.</summary>
/// <param name="column">Insert column.</param>
/// <param name="value">Insert value.</param>
/// <returns>Builder instance.</returns>
IDynamicInsertQueryBuilder Insert(string column, object value);
/// <summary>Add insert fields.</summary>
/// <param name="o">Set insert value as properties and values of an object.</param>
/// <returns>Builder instance.</returns>
IDynamicInsertQueryBuilder Insert(object o);
}
/// <summary>Dynamic query builder base interface.</summary>
/// <remarks>This interface it publically available. Implementation should be hidden.</remarks>
public interface IDynamicQueryBuilder
{
/// <summary>Gets <see cref="DynamicDatabase"/> instance.</summary>
DynamicDatabase Database { get; }
/// <summary>Gets tables information.</summary>
IList<ITableInfo> Tables { get; }
/// <summary>Gets the tables used in this builder.</summary>
IDictionary<string, IParameter> Parameters { get; }
/// <summary>Gets or sets a value indicating whether add virtual parameters.</summary>
bool VirtualMode { get; set; }
/// <summary>Gets a value indicating whether database supports standard schema.</summary>
bool SupportSchema { get; }
/// <summary>Fill command with query.</summary>
/// <param name="command">Command to fill.</param>
/// <returns>Filled instance of <see cref="IDbCommand"/>.</returns>
IDbCommand FillCommand(IDbCommand command);
/// <summary>
/// Generates the text this command will execute against the underlying database.
/// </summary>
/// <returns>The text to execute against the underlying database.</returns>
/// <remarks>This method must be override by derived classes.</remarks>
string CommandText();
/// <summary>Gets or sets the on create temporary parameter action.</summary>
/// <remarks>This is exposed to allow setting schema of column.</remarks>
Action<IParameter> OnCreateTemporaryParameter { get; set; }
/// <summary>Gets or sets the on create real parameter action.</summary>
/// <remarks>This is exposed to allow modification of parameter.</remarks>
Action<IParameter, IDbDataParameter> OnCreateParameter { get; set; }
}
/// <summary>Dynamic select query builder interface.</summary>
/// <remarks>This interface it publically available. Implementation should be hidden.</remarks>
public interface IDynamicSelectQueryBuilder : IDynamicQueryBuilder ////, IEnumerable<object>
{
/// <summary>Execute this builder.</summary>
/// <returns>Enumerator of objects expanded from query.</returns>
IEnumerable<dynamic> Execute();
/// <summary>Execute this builder and map to given type.</summary>
/// <typeparam name="T">Type of object to map on.</typeparam>
/// <returns>Enumerator of objects expanded from query.</returns>
IEnumerable<T> Execute<T>() where T : class;
/// <summary>Execute this builder as a data reader.</summary>
/// <param name="reader">Action containing reader.</param>
void ExecuteDataReader(Action<IDataReader> reader);
/// <summary>Returns a single result.</summary>
/// <returns>Result of a query.</returns>
object Scalar();
#region From/Join
/// <summary>
/// Adds to the 'From' clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: 'x => "Table AS Alias', where the alias part is optional.</para>
/// <para>- Resolve to an expression: 'x => x.Table.As( x.Alias )', where the alias part is optional.</para>
/// <para>- Generic expression: 'x => x( expression ).As( x.Alias )', where the alias part is mandatory. In this
/// case the alias is not annotated.</para>
/// </summary>
/// <param name="fn">The specification.</param>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
IDynamicSelectQueryBuilder From(Func<dynamic, object> fn, params Func<dynamic, object>[] func);
/// <summary>
/// Adds to the 'Join' clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: 'x => "Table AS Alias ON Condition', where the alias part is optional.</para>
/// <para>- Resolve to an expression: 'x => x.Table.As( x.Alias ).On( condition )', where the alias part is optional.</para>
/// <para>- Generic expression: 'x => x( expression ).As( x.Alias ).On( condition )', where the alias part is mandatory.
/// In this case the alias is not annotated.</para>
/// The expression might be prepended by a method that, in this case, is used to specify the specific join type you
/// want to perform, as in: 'x => x.Left()...". Two considerations apply:
/// <para>- If a 'false' argument is used when no 'Join' part appears in its name, then no 'Join' suffix is added
/// with a space in between.</para>
/// <para>- If a 'false' argument is used when a 'Join' part does appear, then no split is performed to separate the
/// 'Join' part.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
IDynamicSelectQueryBuilder Join(params Func<dynamic, object>[] func);
#endregion From/Join
#region Where
/// <summary>
/// Adds to the 'Where' clause the contents obtained from parsing the dynamic lambda expression given. The condition
/// is parsed to the appropriate syntax, where the specific customs virtual methods supported by the parser are used
/// as needed.
/// <para>- If several Where() methods are chained their contents are, by default, concatenated with an 'AND' operator.</para>
/// <para>- The 'And()' and 'Or()' virtual method can be used to concatenate with an 'OR' or an 'AND' operator, as in:
/// 'Where( x => x.Or( condition ) )'.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
IDynamicSelectQueryBuilder Where(Func<dynamic, object> func);
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column with operator and value.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder Where(DynamicColumn column);
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="op">Condition operator.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder Where(string column, DynamicColumn.CompareOperator op, object value);
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder Where(string column, object value);
/// <summary>Add where condition.</summary>
/// <param name="conditions">Set conditions as properties and values of an object.</param>
/// <param name="schema">If <c>true</c> use schema to determine key columns and ignore those which
/// aren't keys.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder Where(object conditions, bool schema = false);
#endregion Where
#region Select
/// <summary>
/// Adds to the 'Select' clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: 'x => "Table.Column AS Alias', where the alias part is optional.</para>
/// <para>- Resolve to an expression: 'x => x.Table.Column.As( x.Alias )', where the alias part is optional.</para>
/// <para>- Select all columns from a table: 'x => x.Table.All()'.</para>
/// <para>- Generic expression: 'x => x( expression ).As( x.Alias )', where the alias part is mandatory. In this case
/// the alias is not annotated.</para>
/// </summary>
/// <param name="fn">The specification.</param>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
IDynamicSelectQueryBuilder Select(Func<dynamic, object> fn, params Func<dynamic, object>[] func);
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to add to object.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder SelectColumn(params DynamicColumn[] columns);
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to add to object.</param>
/// <remarks>Column format consist of <c>Column Name</c>, <c>Alias</c> and
/// <c>Aggregate function</c> in this order separated by '<c>:</c>'.</remarks>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder SelectColumn(params string[] columns);
#endregion Select
#region GroupBy
/// <summary>
/// Adds to the 'Group By' clause the contents obtained from from parsing the dynamic lambda expression given.
/// </summary>
/// <param name="fn">The specification.</param>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
IDynamicSelectQueryBuilder GroupBy(Func<dynamic, object> fn, params Func<dynamic, object>[] func);
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to group by.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder GroupByColumn(params DynamicColumn[] columns);
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to group by.</param>
/// <remarks>Column format consist of <c>Column Name</c> and
/// <c>Alias</c> in this order separated by '<c>:</c>'.</remarks>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder GroupByColumn(params string[] columns);
#endregion GroupBy
#region OrderBy
/// <summary>
/// Adds to the 'Order By' clause the contents obtained from from parsing the dynamic lambda expression given. It
/// accepts a multipart column specification followed by an optional <code>Ascending()</code> or <code>Descending()</code> virtual methods
/// to specify the direction. If no virtual method is used, the default is ascending order. You can also use the
/// shorter versions <code>Asc()</code> and <code>Desc()</code>.
/// </summary>
/// <param name="fn">The specification.</param>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
IDynamicSelectQueryBuilder OrderBy(Func<dynamic, object> fn, params Func<dynamic, object>[] func);
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to order by.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder OrderByColumn(params DynamicColumn[] columns);
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to order by.</param>
/// <remarks>Column format consist of <c>Column Name</c> and
/// <c>Alias</c> in this order separated by '<c>:</c>'.</remarks>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder OrderByColumn(params string[] columns);
#endregion OrderBy
#region Top/Limit/Offset/Distinct
/// <summary>Set top if database support it.</summary>
/// <param name="top">How many objects select.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder Top(int? top);
/// <summary>Set top if database support it.</summary>
/// <param name="limit">How many objects select.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder Limit(int? limit);
/// <summary>Set top if database support it.</summary>
/// <param name="offset">How many objects skip selecting.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder Offset(int? offset);
/// <summary>Set distinct mode.</summary>
/// <param name="distinct">Distinct mode.</param>
/// <returns>Builder instance.</returns>
IDynamicSelectQueryBuilder Distinct(bool distinct = true);
#endregion Top/Limit/Offset/Distinct
}
/// <summary>Dynamic update query builder interface.</summary>
/// <remarks>This interface it publically available. Implementation should be hidden.</remarks>
public interface IDynamicUpdateQueryBuilder : IDynamicQueryBuilder
{
/// <summary>Execute this builder.</summary>
/// <returns>Result of an execution..</returns>
int Execute();
#region Update
/// <summary>Add update value or where condition using schema.</summary>
/// <param name="column">Update or where column name.</param>
/// <param name="value">Column value.</param>
/// <returns>Builder instance.</returns>
IDynamicUpdateQueryBuilder Update(string column, object value);
/// <summary>Add update values and where condition columns using schema.</summary>
/// <param name="conditions">Set values or conditions as properties and values of an object.</param>
/// <returns>Builder instance.</returns>
IDynamicUpdateQueryBuilder Update(object conditions);
#endregion Update
#region Values
/// <summary>
/// Specifies the columns to update using the dynamic lambda expressions given. Each expression correspond to one
/// column, and can:
/// <para>- Resolve to a string, in this case a '=' must appear in the string.</para>
/// <para>- Resolve to a expression with the form: 'x => x.Column = Value'.</para>
/// </summary>
/// <param name="func">The specifications.</param>
/// <returns>This instance to permit chaining.</returns>
IDynamicUpdateQueryBuilder Set(params Func<dynamic, object>[] func);
/// <summary>Add insert fields.</summary>
/// <param name="column">Insert column.</param>
/// <param name="value">Insert value.</param>
/// <returns>Builder instance.</returns>
IDynamicUpdateQueryBuilder Values(string column, object value);
/// <summary>Add insert fields.</summary>
/// <param name="o">Set insert value as properties and values of an object.</param>
/// <returns>Builder instance.</returns>
IDynamicUpdateQueryBuilder Values(object o);
#endregion Values
#region Where
/// <summary>
/// Adds to the 'Where' clause the contents obtained from parsing the dynamic lambda expression given. The condition
/// is parsed to the appropriate syntax, where the specific customs virtual methods supported by the parser are used
/// as needed.
/// <para>- If several Where() methods are chained their contents are, by default, concatenated with an 'AND' operator.</para>
/// <para>- The 'And()' and 'Or()' virtual method can be used to concatenate with an 'OR' or an 'AND' operator, as in:
/// 'Where( x => x.Or( condition ) )'.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
IDynamicUpdateQueryBuilder Where(Func<dynamic, object> func);
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column with operator and value.</param>
/// <returns>Builder instance.</returns>
IDynamicUpdateQueryBuilder Where(DynamicColumn column);
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="op">Condition operator.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
IDynamicUpdateQueryBuilder Where(string column, DynamicColumn.CompareOperator op, object value);
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
IDynamicUpdateQueryBuilder Where(string column, object value);
/// <summary>Add where condition.</summary>
/// <param name="conditions">Set conditions as properties and values of an object.</param>
/// <param name="schema">If <c>true</c> use schema to determine key columns and ignore those which
/// aren't keys.</param>
/// <returns>Builder instance.</returns>
IDynamicUpdateQueryBuilder Where(object conditions, bool schema = false);
#endregion Where
}
/// <summary>Interface describing parameter info.</summary>
public interface IParameter
{
/// <summary>Gets the parameter position in command.</summary>
/// <remarks>Available after filling the command.</remarks>
int Ordinal { get; }
/// <summary>Gets the parameter temporary name.</summary>
string Name { get; }
/// <summary>Gets or sets the parameter value.</summary>
object Value { get; set; }
/// <summary>Gets or sets a value indicating whether name of temporary parameter is well known.</summary>
bool WellKnown { get; set; }
/// <summary>Gets or sets a value indicating whether this <see cref="IParameter"/> is virtual.</summary>
bool Virtual { get; set; }
/// <summary>Gets or sets the parameter schema information.</summary>
DynamicSchemaColumn? Schema { get; set; }
}
/// <summary>Interface describing table information.</summary>
public interface ITableInfo
{
/// <summary>Gets table owner name.</summary>
string Owner { get; }
/// <summary>Gets table name.</summary>
string Name { get; }
/// <summary>Gets table alias.</summary>
string Alias { get; }
/// <summary>Gets table schema.</summary>
Dictionary<string, DynamicSchemaColumn> Schema { get; }
}
namespace Extensions
{
internal static class DynamicModifyBuilderExtensions
{
internal static T Table<T>(this T builder, Func<dynamic, object> func) where T : DynamicModifyBuilder
{
if (func == null)
throw new ArgumentNullException("Function cannot be null.");
using (var parser = DynamicParser.Parse(func))
{
var result = parser.Result;
// If the expression result is string.
if (result is string)
return builder.Table((string)result);
else if (result is Type)
return builder.Table((Type)result);
else if (result is DynamicParser.Node)
{
// Or if it resolves to a dynamic node
var node = (DynamicParser.Node)result;
string owner = null;
string main = null;
while (true)
{
// Deny support for the AS() virtual method...
if (node is DynamicParser.Node.Method && ((DynamicParser.Node.Method)node).Name.ToUpper() == "AS")
throw new ArgumentException(string.Format("Alias is not supported on modification builders. (Parsing: {0})", result));
// Support for table specifications...
if (node is DynamicParser.Node.GetMember)
{
if (owner != null)
throw new ArgumentException(string.Format("Owner '{0}.{1}' is already set when parsing '{2}'.", owner, main, result));
if (main != null)
owner = ((DynamicParser.Node.GetMember)node).Name;
else
main = ((DynamicParser.Node.GetMember)node).Name;
node = node.Host;
continue;
}
// Support for generic sources...
if (node is DynamicParser.Node.Invoke)
{
if (owner == null && main == null)
{
var invoke = (DynamicParser.Node.Invoke)node;
if (invoke.Arguments.Length == 1 && invoke.Arguments[0] is Type)
return builder.Table((Type)invoke.Arguments[0]);
else if (invoke.Arguments.Length == 1 && invoke.Arguments[0] is String)
return builder.Table((string)invoke.Arguments[0]);
else
throw new ArgumentException(string.Format("Invalid argument count or type when parsing '{2}'. Invoke supports only one argument of type Type or String", owner, main, result));
}
else if (owner != null)
throw new ArgumentException(string.Format("Owner '{0}.{1}' is already set when parsing '{2}'.", owner, main, result));
else if (main != null)
throw new ArgumentException(string.Format("Main '{0}' is already set when parsing '{1}'.", main, result));
}
if (!string.IsNullOrEmpty(main))
return builder.Table(string.Format("{0}{1}",
string.IsNullOrEmpty(owner) ? string.Empty : string.Format("{0}.", owner),
main));
}
}
throw new ArgumentException(string.Format("Unable to set table parsing '{0}'", result));
}
}
internal static T Table<T>(this T builder, string tableName, Dictionary<string, DynamicSchemaColumn> schema = null) where T : DynamicModifyBuilder
{
var tuple = tableName.Validated("Table Name").SplitSomethingAndAlias();
if (!string.IsNullOrEmpty(tuple.Item2))
throw new ArgumentException(string.Format("Can not use aliases in INSERT steatement. ({0})", tableName), "tableName");
var parts = tuple.Item1.Split('.');
if (parts.Length > 2)
throw new ArgumentException(string.Format("Table name can consist only from name or owner and name. ({0})", tableName), "tableName");
builder.Tables.Clear();
builder.Tables.Add(new DynamicQueryBuilder.TableInfo(builder.Database,
builder.Database.StripName(parts.Last()).Validated("Table"), null,
parts.Length == 2 ? builder.Database.StripName(parts.First()).Validated("Owner", canbeNull: true) : null));
if (schema != null)
(builder.Tables[0] as DynamicQueryBuilder.TableInfo).Schema = schema;
return builder;
}
internal static T Table<T>(this T builder, Type type) where T : DynamicQueryBuilder
{
if (type.IsAnonymous())
throw new InvalidOperationException(string.Format("Cant assign anonymous type as a table ({0}).", type.FullName));
var mapper = DynamicMapperCache.GetMapper(type);
if (mapper == null)
throw new InvalidOperationException("Cant assign unmapable type as a table.");
if (builder is DynamicModifyBuilder)
{
builder.Tables.Clear();
builder.Tables.Add(new DynamicQueryBuilder.TableInfo(builder.Database, type));
}
else if (builder is DynamicSelectQueryBuilder)
(builder as DynamicSelectQueryBuilder).From(x => x(type));
return builder;
}
}
internal static class DynamicWhereQueryExtensions
{
#region Where
internal static T InternalWhere<T>(this T builder, Func<dynamic, object> func) where T : DynamicQueryBuilder, DynamicQueryBuilder.IQueryWithWhere
{
return builder.InternalWhere(false, false, func);
}
internal static T InternalWhere<T>(this T builder, bool addBeginBrace, bool addEndBrace, Func<dynamic, object> func) where T : DynamicQueryBuilder, DynamicQueryBuilder.IQueryWithWhere
{
if (func == null) throw new ArgumentNullException("Array of functions cannot be null.");
using (var parser = DynamicParser.Parse(func))
{
string condition = null;
bool and = true;
var result = parser.Result;
if (result is string)
{
condition = (string)result;
if (condition.ToUpper().IndexOf("OR") == 0)
{
and = false;
condition = condition.Substring(3);
}
else if (condition.ToUpper().IndexOf("AND") == 0)
condition = condition.Substring(4);
}
else if (!(result is DynamicParser.Node) && !result.GetType().IsValueType)
return builder.InternalWhere(result);
else
{
// Intercepting the 'x => x.And()' and 'x => x.Or()' virtual methods...
if (result is DynamicParser.Node.Method && ((DynamicParser.Node.Method)result).Host is DynamicParser.Node.Argument)
{
var node = (DynamicParser.Node.Method)result;
var name = node.Name.ToUpper();
if (name == "AND" || name == "OR")
{
object[] args = ((DynamicParser.Node.Method)node).Arguments;
if (args == null) throw new ArgumentNullException("arg", string.Format("{0} is not a parameterless method.", name));
if (args.Length != 1) throw new ArgumentException(string.Format("{0} requires one and only one parameter: {1}.", name, args.Sketch()));
and = name == "AND" ? true : false;
result = args[0];
}
}
// Just parsing the contents now...
condition = builder.Parse(result, pars: builder.Parameters).Validated("Where condition");
}
if (addBeginBrace) builder.OpenBracketsCount++;
if (addEndBrace) builder.OpenBracketsCount--;
if (builder.WhereCondition == null)
builder.WhereCondition = string.Format("{0}{1}{2}",
addBeginBrace ? "(" : string.Empty, condition, addEndBrace ? ")" : string.Empty);
else
builder.WhereCondition = string.Format("{0} {1} {2}{3}{4}", builder.WhereCondition, and ? "AND" : "OR",
addBeginBrace ? "(" : string.Empty, condition, addEndBrace ? ")" : string.Empty);
}
return builder;
}
internal static T InternalWhere<T>(this T builder, DynamicColumn column) where T : DynamicQueryBuilder, DynamicQueryBuilder.IQueryWithWhere
{
bool virt = builder.VirtualMode;
if (column.VirtualColumn.HasValue)
builder.VirtualMode = column.VirtualColumn.Value;
// It's kind of uglu, but... well it works.
if (column.Or)
switch (column.Operator)
{
default:
case DynamicColumn.CompareOperator.Eq: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x.Or(x(builder.FixObjectName(column.ColumnName)) == column.Value)); break;
case DynamicColumn.CompareOperator.Not: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x.Or(x(builder.FixObjectName(column.ColumnName)) != column.Value)); break;
case DynamicColumn.CompareOperator.Like: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x.Or(x(builder.FixObjectName(column.ColumnName)).Like(column.Value))); break;
case DynamicColumn.CompareOperator.NotLike: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x.Or(x(builder.FixObjectName(column.ColumnName)).NotLike(column.Value))); break;
case DynamicColumn.CompareOperator.In: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x.Or(x(builder.FixObjectName(column.ColumnName)).In(column.Value))); break;
case DynamicColumn.CompareOperator.Lt: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x.Or(x(builder.FixObjectName(column.ColumnName)) < column.Value)); break;
case DynamicColumn.CompareOperator.Lte: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x.Or(x(builder.FixObjectName(column.ColumnName)) <= column.Value)); break;
case DynamicColumn.CompareOperator.Gt: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x.Or(x(builder.FixObjectName(column.ColumnName)) > column.Value)); break;
case DynamicColumn.CompareOperator.Gte: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x.Or(x(builder.FixObjectName(column.ColumnName)) >= column.Value)); break;
case DynamicColumn.CompareOperator.Between: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x.Or(x(builder.FixObjectName(column.ColumnName)).Between(column.Value))); break;
}
else
switch (column.Operator)
{
default:
case DynamicColumn.CompareOperator.Eq: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x(builder.FixObjectName(column.ColumnName)) == column.Value); break;
case DynamicColumn.CompareOperator.Not: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x(builder.FixObjectName(column.ColumnName)) != column.Value); break;
case DynamicColumn.CompareOperator.Like: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x(builder.FixObjectName(column.ColumnName)).Like(column.Value)); break;
case DynamicColumn.CompareOperator.NotLike: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x(builder.FixObjectName(column.ColumnName)).NotLike(column.Value)); break;
case DynamicColumn.CompareOperator.In: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x(builder.FixObjectName(column.ColumnName)).In(column.Value)); break;
case DynamicColumn.CompareOperator.Lt: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x(builder.FixObjectName(column.ColumnName)) < column.Value); break;
case DynamicColumn.CompareOperator.Lte: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x(builder.FixObjectName(column.ColumnName)) <= column.Value); break;
case DynamicColumn.CompareOperator.Gt: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x(builder.FixObjectName(column.ColumnName)) > column.Value); break;
case DynamicColumn.CompareOperator.Gte: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x(builder.FixObjectName(column.ColumnName)) >= column.Value); break;
case DynamicColumn.CompareOperator.Between: builder.InternalWhere(column.BeginBlock, column.EndBlock, x => x(builder.FixObjectName(column.ColumnName)).Between(column.Value)); break;
}
builder.VirtualMode = virt;
return builder;
}
internal static T InternalWhere<T>(this T builder, string column, DynamicColumn.CompareOperator op, object value) where T : DynamicQueryBuilder, DynamicQueryBuilder.IQueryWithWhere
{
if (value is DynamicColumn)
{
var v = (DynamicColumn)value;
if (string.IsNullOrEmpty(v.ColumnName))
v.ColumnName = column;
return builder.InternalWhere(v);
}
else if (value is IEnumerable<DynamicColumn>)
{
foreach (DynamicColumn v in (IEnumerable<DynamicColumn>)value)
builder.InternalWhere(v);
return builder;
}
return builder.InternalWhere(new DynamicColumn
{
ColumnName = column,
Operator = op,
Value = value
});
}
internal static T InternalWhere<T>(this T builder, string column, object value) where T : DynamicQueryBuilder, DynamicQueryBuilder.IQueryWithWhere
{
return builder.InternalWhere(column, DynamicColumn.CompareOperator.Eq, value);
}
internal static T InternalWhere<T>(this T builder, object conditions, bool schema = false) where T : DynamicQueryBuilder, DynamicQueryBuilder.IQueryWithWhere
{
if (conditions is DynamicColumn)
return builder.InternalWhere((DynamicColumn)conditions);
else if (conditions is IEnumerable<DynamicColumn>)
{
foreach (DynamicColumn v in (IEnumerable<DynamicColumn>)conditions)
builder.InternalWhere(v);
return builder;
}
var dict = conditions.ToDictionary();
var mapper = DynamicMapperCache.GetMapper(conditions.GetType());
var table = dict.TryGetValue("_table").NullOr(x => x.ToString(), string.Empty);
foreach (var condition in dict)
{
if (mapper.Ignored.Contains(condition.Key) || condition.Key == "_table")
continue;
string colName = mapper != null ? mapper.PropertyMap.TryGetValue(condition.Key) ?? condition.Key : condition.Key;
DynamicSchemaColumn? col = null;
// This should be used on typed queries or update/delete steatements, which usualy operate on a single table.
if (schema)
{
col = builder.GetColumnFromSchema(colName, mapper, table);
if ((!col.HasValue || !col.Value.IsKey) &&
(mapper == null || mapper.ColumnsMap.TryGetValue(colName).NullOr(m => m.Ignore || m.Column.NullOr(c => !c.IsKey, true), true)))
continue;
colName = col.HasValue ? col.Value.Name : colName;
}
if (!string.IsNullOrEmpty(table))
builder.InternalWhere(x => x(builder.FixObjectName(string.Format("{0}.{1}", table, colName))) == condition.Value);
else
builder.InternalWhere(x => x(builder.FixObjectName(colName)) == condition.Value);
}
return builder;
}
#endregion Where
}
}
namespace Implementation
{
/// <summary>Implementation of dynamic delete query builder.</summary>
internal class DynamicDeleteQueryBuilder : DynamicModifyBuilder, IDynamicDeleteQueryBuilder, DynamicQueryBuilder.IQueryWithWhere
{
/// <summary>
/// Initializes a new instance of the <see cref="DynamicDeleteQueryBuilder"/> class.
/// </summary>
/// <param name="db">The database.</param>
internal DynamicDeleteQueryBuilder(DynamicDatabase db)
: base(db)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="DynamicDeleteQueryBuilder"/> class.
/// </summary>
/// <param name="db">The database.</param>
/// <param name="tableName">Name of the table.</param>
public DynamicDeleteQueryBuilder(DynamicDatabase db, string tableName)
: base(db, tableName)
{
}
/// <summary>Generates the text this command will execute against the underlying database.</summary>
/// <returns>The text to execute against the underlying database.</returns>
/// <remarks>This method must be override by derived classes.</remarks>
public override string CommandText()
{
var info = Tables.Single();
return string.Format("DELETE FROM {0}{1}{2}{3}",
string.IsNullOrEmpty(info.Owner) ? string.Empty : string.Format("{0}.", Database.DecorateName(info.Owner)),
Database.DecorateName(info.Name),
string.IsNullOrEmpty(WhereCondition) ? string.Empty : " WHERE ",
WhereCondition);
}
#region Where
/// <summary>
/// Adds to the 'Where' clause the contents obtained from parsing the dynamic lambda expression given. The condition
/// is parsed to the appropriate syntax, where the specific customs virtual methods supported by the parser are used
/// as needed.
/// <para>- If several Where() methods are chained their contents are, by default, concatenated with an 'AND' operator.</para>
/// <para>- The 'And()' and 'Or()' virtual method can be used to concatenate with an 'OR' or an 'AND' operator, as in:
/// 'Where( x => x.Or( condition ) )'.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicDeleteQueryBuilder Where(Func<dynamic, object> func)
{
return this.InternalWhere(func);
}
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column with operator and value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicDeleteQueryBuilder Where(DynamicColumn column)
{
return this.InternalWhere(column);
}
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="op">Condition operator.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicDeleteQueryBuilder Where(string column, DynamicColumn.CompareOperator op, object value)
{
return this.InternalWhere(column, op, value);
}
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicDeleteQueryBuilder Where(string column, object value)
{
return this.InternalWhere(column, value);
}
/// <summary>Add where condition.</summary>
/// <param name="conditions">Set conditions as properties and values of an object.</param>
/// <param name="schema">If <c>true</c> use schema to determine key columns and ignore those which
/// aren't keys.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicDeleteQueryBuilder Where(object conditions, bool schema = false)
{
return this.InternalWhere(conditions, schema);
}
#endregion Where
}
/// <summary>Implementation of dynamic insert query builder.</summary>
internal class DynamicInsertQueryBuilder : DynamicModifyBuilder, IDynamicInsertQueryBuilder
{
private string _columns;
private string _values;
/// <summary>
/// Initializes a new instance of the <see cref="DynamicInsertQueryBuilder"/> class.
/// </summary>
/// <param name="db">The database.</param>
internal DynamicInsertQueryBuilder(DynamicDatabase db)
: base(db)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="DynamicInsertQueryBuilder"/> class.
/// </summary>
/// <param name="db">The database.</param>
/// <param name="tableName">Name of the table.</param>
public DynamicInsertQueryBuilder(DynamicDatabase db, string tableName)
: base(db, tableName)
{
}
/// <summary>Generates the text this command will execute against the underlying database.</summary>
/// <returns>The text to execute against the underlying database.</returns>
/// <remarks>This method must be override by derived classes.</remarks>
public override string CommandText()
{
var info = Tables.Single();
return string.Format("INSERT INTO {0}{1} ({2}) VALUES ({3})",
string.IsNullOrEmpty(info.Owner) ? string.Empty : string.Format("{0}.", Database.DecorateName(info.Owner)),
Database.DecorateName(info.Name), _columns, _values);
}
#region Insert
/// <summary>
/// Specifies the columns to insert using the dynamic lambda expressions given. Each expression correspond to one
/// column, and can:
/// <para>- Resolve to a string, in this case a '=' must appear in the string.</para>
/// <para>- Resolve to a expression with the form: 'x => x.Column = Value'.</para>
/// </summary>
/// <param name="fn">The specifications.</param>
/// <param name="func">The specifications.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicInsertQueryBuilder Values(Func<dynamic, object> fn, params Func<dynamic, object>[] func)
{
if (fn == null)
throw new ArgumentNullException("Array of specifications cannot be null.");
int index = InsertFunc(-1, fn);
if (func != null)
foreach (var f in func)
index = InsertFunc(index, f);
return this;
}
private int InsertFunc(int index, Func<dynamic, object> f)
{
index++;
if (f == null)
throw new ArgumentNullException(string.Format("Specification #{0} cannot be null.", index));
using (var parser = DynamicParser.Parse(f))
{
var result = parser.Result;
if (result == null)
throw new ArgumentException(string.Format("Specification #{0} resolves to null.", index));
string main = null;
string value = null;
string str = null;
// When 'x => x.Table.Column = value' or 'x => x.Column = value'...
if (result is DynamicParser.Node.SetMember)
{
var node = (DynamicParser.Node.SetMember)result;
DynamicSchemaColumn? col = GetColumnFromSchema(node.Name);
main = Database.DecorateName(node.Name);
value = Parse(node.Value, pars: Parameters, nulls: true, columnSchema: col);
_columns = _columns == null ? main : string.Format("{0}, {1}", _columns, main);
_values = _values == null ? value : string.Format("{0}, {1}", _values, value);
return index;
}
else if (!(result is DynamicParser.Node) && !result.GetType().IsValueType)
{
Insert(result);
return index;
}
// Other specifications are considered invalid...
var err = string.Format("Specification '{0}' is invalid.", result);
str = Parse(result);
if (str.Contains("=")) err += " May have you used a '==' instead of a '=' operator?";
throw new ArgumentException(err);
}
}
/// <summary>Add insert fields.</summary>
/// <param name="column">Insert column.</param>
/// <param name="value">Insert value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicInsertQueryBuilder Insert(string column, object value)
{
if (value is DynamicColumn)
{
var v = (DynamicColumn)value;
if (string.IsNullOrEmpty(v.ColumnName))
v.ColumnName = column;
return Insert(v);
}
return Insert(new DynamicColumn
{
ColumnName = column,
Value = value,
});
}
/// <summary>Add insert fields.</summary>
/// <param name="o">Set insert value as properties and values of an object.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicInsertQueryBuilder Insert(object o)
{
if (o is DynamicColumn)
{
var column = (DynamicColumn)o;
DynamicSchemaColumn? col = column.Schema ?? GetColumnFromSchema(column.ColumnName);
string main = FixObjectName(column.ColumnName, onlyColumn: true);
string value = Parse(column.Value, pars: Parameters, nulls: true, columnSchema: col);
_columns = _columns == null ? main : string.Format("{0}, {1}", _columns, main);
_values = _values == null ? value : string.Format("{0}, {1}", _values, value);
return this;
}
var dict = o.ToDictionary();
var mapper = DynamicMapperCache.GetMapper(o.GetType());
if (mapper != null)
{
foreach (var con in dict)
if (!mapper.Ignored.Contains(con.Key))
{
var colName = mapper.PropertyMap.TryGetValue(con.Key) ?? con.Key;
var propMap = mapper.ColumnsMap.TryGetValue(colName.ToLower());
if (propMap == null || propMap.Column == null || !propMap.Column.IsNoInsert)
Insert(colName, con.Value);
}
}
else
foreach (var con in dict)
Insert(con.Key, con.Value);
return this;
}
#endregion Insert
}
/// <summary>Base query builder for insert/update/delete statements.</summary>
internal abstract class DynamicModifyBuilder : DynamicQueryBuilder
{
/// <summary>
/// Initializes a new instance of the <see cref="DynamicModifyBuilder"/> class.
/// </summary>
/// <param name="db">The database.</param>
public DynamicModifyBuilder(DynamicDatabase db)
: base(db)
{
VirtualMode = false;
}
/// <summary>
/// Initializes a new instance of the <see cref="DynamicModifyBuilder" /> class.
/// </summary>
/// <param name="db">The database.</param>
/// <param name="tableName">Name of the table.</param>
public DynamicModifyBuilder(DynamicDatabase db, string tableName)
: this(db)
{
VirtualMode = false;
this.Table(tableName);
}
/// <summary>Execute this builder.</summary>
/// <returns>Result of an execution..</returns>
public virtual int Execute()
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
{
return cmd
.SetCommand(this)
.ExecuteNonQuery();
}
}
}
/// <summary>Implementation of dynamic query builder base interface.</summary>
internal abstract class DynamicQueryBuilder : IDynamicQueryBuilder
{
/// <summary>Empty interface to allow where query builder implementation use universal approach.</summary>
internal interface IQueryWithWhere
{
/// <summary>Gets or sets the where condition.</summary>
string WhereCondition { get; set; }
/// <summary>Gets or sets the amount of not closed brackets in where statement.</summary>
int OpenBracketsCount { get; set; }
}
private DynamicQueryBuilder _parent = null;
#region TableInfo
/// <summary>Table information.</summary>
internal class TableInfo : ITableInfo
{
/// <summary>
/// Initializes a new instance of the <see cref="TableInfo"/> class.
/// </summary>
internal TableInfo()
{
}
/// <summary>
/// Initializes a new instance of the <see cref="TableInfo" /> class.
/// </summary>
/// <param name="db">The database.</param>
/// <param name="name">The name of table.</param>
/// <param name="alias">The table alias.</param>
/// <param name="owner">The table owner.</param>
public TableInfo(DynamicDatabase db, string name, string alias = null, string owner = null)
{
Name = name;
Alias = alias;
Owner = owner;
if (!name.ContainsAny(StringExtensions.InvalidMemberChars))
Schema = db.GetSchema(name, owner: owner);
}
/// <summary>
/// Initializes a new instance of the <see cref="TableInfo" /> class.
/// </summary>
/// <param name="db">The database.</param>
/// <param name="type">The type which can be mapped to database.</param>
/// <param name="alias">The table alias.</param>
/// <param name="owner">The table owner.</param>
public TableInfo(DynamicDatabase db, Type type, string alias = null, string owner = null)
{
var mapper = DynamicMapperCache.GetMapper(type);
Name = mapper.Table == null || string.IsNullOrEmpty(mapper.Table.Name) ?
mapper.Type.Name : mapper.Table.Name;
Owner = (mapper.Table != null) ? mapper.Table.Owner : owner;
Alias = alias;
Schema = db.GetSchema(type);
}
/// <summary>Gets or sets table owner name.</summary>
public string Owner { get; internal set; }
/// <summary>Gets or sets table name.</summary>
public string Name { get; internal set; }
/// <summary>Gets or sets table alias.</summary>
public string Alias { get; internal set; }
/// <summary>Gets or sets table schema.</summary>
public Dictionary<string, DynamicSchemaColumn> Schema { get; internal set; }
}
/// <summary>Generic based table information.</summary>
/// <typeparam name="T">Type of class that is represented in database.</typeparam>
internal class TableInfo<T> : TableInfo
{
/// <summary>
/// Initializes a new instance of the <see cref="TableInfo{T}" /> class.
/// </summary>
/// <param name="db">The database.</param>
/// <param name="alias">The table alias.</param>
/// <param name="owner">The table owner.</param>
public TableInfo(DynamicDatabase db, string alias = null, string owner = null)
: base(db, typeof(T), alias, owner)
{
}
}
#endregion TableInfo
#region Parameter
/// <summary>Interface describing parameter info.</summary>
internal class Parameter : IParameter
{
/// <summary>Gets or sets the parameter position in command.</summary>
/// <remarks>Available after filling the command.</remarks>
public int Ordinal { get; internal set; }
/// <summary>Gets or sets the parameter temporary name.</summary>
public string Name { get; internal set; }
/// <summary>Gets or sets the parameter value.</summary>
public object Value { get; set; }
/// <summary>Gets or sets a value indicating whether name of temporary parameter is well known.</summary>
public bool WellKnown { get; set; }
/// <summary>Gets or sets a value indicating whether this <see cref="Parameter"/> is virtual.</summary>
public bool Virtual { get; set; }
/// <summary>Gets or sets the parameter schema information.</summary>
public DynamicSchemaColumn? Schema { get; set; }
}
#endregion Parameter
#region Constructor
/// <summary>
/// Initializes a new instance of the <see cref="DynamicQueryBuilder"/> class.
/// </summary>
/// <param name="db">The database.</param>
public DynamicQueryBuilder(DynamicDatabase db)
{
VirtualMode = false;
Tables = new List<ITableInfo>();
Parameters = new Dictionary<string, IParameter>();
WhereCondition = null;
OpenBracketsCount = 0;
Database = db;
SupportSchema = (db.Options & DynamicDatabaseOptions.SupportSchema) == DynamicDatabaseOptions.SupportSchema;
}
/// <summary>Initializes a new instance of the <see cref="DynamicQueryBuilder"/> class.</summary>
/// <param name="db">The database.</param>
/// <param name="parent">The parent query.</param>
internal DynamicQueryBuilder(DynamicDatabase db, DynamicQueryBuilder parent)
: this(db)
{
_parent = parent;
}
#endregion Constructor
#region IQueryWithWhere
/// <summary>Gets or sets the where condition.</summary>
public string WhereCondition { get; set; }
/// <summary>Gets or sets the amount of not closed brackets in where statement.</summary>
public int OpenBracketsCount { get; set; }
#endregion IQueryWithWhere
#region IDynamicQueryBuilder
/// <summary>Gets <see cref="DynamicDatabase"/> instance.</summary>
public DynamicDatabase Database { get; private set; }
/// <summary>Gets the tables used in this builder.</summary>
public IList<ITableInfo> Tables { get; private set; }
/// <summary>Gets the tables used in this builder.</summary>
public IDictionary<string, IParameter> Parameters { get; private set; }
/// <summary>Gets or sets a value indicating whether add virtual parameters.</summary>
public bool VirtualMode { get; set; }
/// <summary>Gets or sets the on create temporary parameter action.</summary>
/// <remarks>This is exposed to allow setting schema of column.</remarks>
public Action<IParameter> OnCreateTemporaryParameter { get; set; }
/// <summary>Gets or sets the on create real parameter action.</summary>
/// <remarks>This is exposed to allow modification of parameter.</remarks>
public Action<IParameter, IDbDataParameter> OnCreateParameter { get; set; }
/// <summary>Gets a value indicating whether database supports standard schema.</summary>
public bool SupportSchema { get; private set; }
/// <summary>
/// Generates the text this command will execute against the underlying database.
/// </summary>
/// <returns>The text to execute against the underlying database.</returns>
/// <remarks>This method must be override by derived classes.</remarks>
public abstract string CommandText();
/// <summary>Fill command with query.</summary>
/// <param name="command">Command to fill.</param>
/// <returns>Filled instance of <see cref="IDbCommand"/>.</returns>
public virtual IDbCommand FillCommand(IDbCommand command)
{
// End not ended where statement
if (this is IQueryWithWhere)
{
while (OpenBracketsCount > 0)
{
WhereCondition += ")";
OpenBracketsCount--;
}
}
return command.SetCommand(CommandText()
.FillStringWithVariables(s =>
{
return Parameters.TryGetValue(s).NullOr(p =>
{
IDbDataParameter param = (IDbDataParameter)command
.AddParameter(this, p.Schema, p.Value)
.Parameters[command.Parameters.Count - 1];
(p as Parameter).Ordinal = command.Parameters.Count - 1;
if (OnCreateParameter != null)
OnCreateParameter(p, param);
return param.ParameterName;
}, s);
}));
}
#endregion IDynamicQueryBuilder
#region Parser
/// <summary>Parses the arbitrary object given and translates it into a string with the appropriate
/// syntax for the database this parser is specific to.</summary>
/// <param name="node">The object to parse and translate. It can be any arbitrary object, including null values (if
/// permitted) and dynamic lambda expressions.</param>
/// <param name="pars">If not null, the parameters' list where to store the parameters extracted by the parsing.</param>
/// <param name="rawstr">If true, literal (raw) string are allowed. If false and the node is a literal then, as a
/// security measure, an exception is thrown.</param>
/// <param name="nulls">True to accept null values and translate them into the appropriate syntax accepted by the
/// database. If false and the value is null, then an exception is thrown.</param>
/// <param name="decorate">If set to <c>true</c> decorate element.</param>
/// <param name="isMultiPart">If set parse argument as alias. This is workaround for AS method.</param>
/// <param name="columnSchema">This parameter is used to determine type of parameter used in query.</param>
/// <returns>A string containing the result of the parsing, along with the parameters extracted in the
/// <paramref name="pars" /> instance if such is given.</returns>
/// <exception cref="System.ArgumentNullException">Null nodes are not accepted.</exception>
internal virtual string Parse(object node, IDictionary<string, IParameter> pars = null, bool rawstr = false, bool nulls = false, bool decorate = true, bool isMultiPart = true, DynamicSchemaColumn? columnSchema = null)
{
// Null nodes are accepted or not depending upon the "nulls" flag...
if (node == null)
{
if (!nulls)
throw new ArgumentNullException("node", "Null nodes are not accepted.");
return Dispatch(node, pars, decorate, columnSchema: columnSchema);
}
// Nodes that are strings are parametrized or not depending the "rawstr" flag...
if (node is string)
{
if (rawstr) return (string)node;
else return Dispatch(node, pars, decorate, columnSchema: columnSchema);
}
// If node is a delegate, parse it to create the logical tree...
if (node is Delegate)
{
node = DynamicParser.Parse((Delegate)node).Result;
return Parse(node, pars, rawstr, decorate: decorate, columnSchema: columnSchema); // Intercept containers as in (x => "string")
}
return Dispatch(node, pars, decorate, isMultiPart, columnSchema);
}
private string Dispatch(object node, IDictionary<string, IParameter> pars = null, bool decorate = true, bool isMultiPart = true, DynamicSchemaColumn? columnSchema = null)
{
if (node != null)
{
if (node is DynamicQueryBuilder) return ParseCommand((DynamicQueryBuilder)node, pars);
else if (node is DynamicParser.Node.Argument) return ParseArgument((DynamicParser.Node.Argument)node, isMultiPart);
else if (node is DynamicParser.Node.GetMember) return ParseGetMember((DynamicParser.Node.GetMember)node, pars, decorate, isMultiPart, columnSchema);
else if (node is DynamicParser.Node.SetMember) return ParseSetMember((DynamicParser.Node.SetMember)node, pars, decorate, isMultiPart, columnSchema);
else if (node is DynamicParser.Node.Unary) return ParseUnary((DynamicParser.Node.Unary)node, pars);
else if (node is DynamicParser.Node.Binary) return ParseBinary((DynamicParser.Node.Binary)node, pars);
else if (node is DynamicParser.Node.Method) return ParseMethod((DynamicParser.Node.Method)node, pars);
else if (node is DynamicParser.Node.Invoke) return ParseInvoke((DynamicParser.Node.Invoke)node, pars);
else if (node is DynamicParser.Node.Convert) return ParseConvert((DynamicParser.Node.Convert)node, pars);
}
// All other cases are considered constant parameters...
return ParseConstant(node, pars, columnSchema);
}
internal virtual string ParseCommand(DynamicQueryBuilder node, IDictionary<string, IParameter> pars = null)
{
// Getting the command's text...
string str = node.CommandText(); // Avoiding spurious "OUTPUT XXX" statements
// If there are parameters to transform, but cannot store them, it is an error
if (node.Parameters.Count != 0 && pars == null)
throw new InvalidOperationException(string.Format("The parameters in this command '{0}' cannot be added to a null collection.", node.Parameters));
// Copy parameters to new comand
foreach (var parameter in node.Parameters)
pars.Add(parameter.Key, parameter.Value);
return string.Format("({0})", str);
}
protected virtual string ParseArgument(DynamicParser.Node.Argument node, bool isMultiPart = true, bool isOwner = false)
{
if (!string.IsNullOrEmpty(node.Name) && (isOwner || (isMultiPart && IsTableAlias(node.Name))))
return node.Name;
return null;
}
protected virtual string ParseGetMember(DynamicParser.Node.GetMember node, IDictionary<string, IParameter> pars = null, bool decorate = true, bool isMultiPart = true, DynamicSchemaColumn? columnSchema = null)
{
if (node.Host is DynamicParser.Node.Argument && IsTableAlias(node.Name))
{
decorate = false;
isMultiPart = false;
}
// This hack allows to use argument as alias, but when it is not nesesary use other column.
// Let say we hace a table Users with alias usr, and we join to table with alias ua which also has a column Users
// This allow use of usr => usr.ua.Users to result in ua."Users" instead of "Users" or usr."ua"."Users", se tests for examples.
string parent = null;
if (node.Host != null)
{
if (isMultiPart && node.Host is DynamicParser.Node.GetMember && IsTable(node.Host.Name, null))
{
if (node.Host.Host != null && node.Host.Host is DynamicParser.Node.GetMember && IsTable(node.Host.Name, node.Host.Host.Name))
parent = string.Format("{0}.{1}", Parse(node.Host.Host, pars, isMultiPart: false), Parse(node.Host, pars, isMultiPart: false));
else
parent = Parse(node.Host, pars, isMultiPart: false);
}
else if (isMultiPart)
parent = Parse(node.Host, pars, isMultiPart: isMultiPart);
}
////string parent = node.Host == null || !isMultiPart ? null : Parse(node.Host, pars, isMultiPart: !IsTable(node.Name, node.Host.Name));
string name = parent == null ?
decorate ? Database.DecorateName(node.Name) : node.Name :
string.Format("{0}.{1}", parent, decorate ? Database.DecorateName(node.Name) : node.Name);
columnSchema = GetColumnFromSchema(name);
return name;
}
protected virtual string ParseSetMember(DynamicParser.Node.SetMember node, IDictionary<string, IParameter> pars = null, bool decorate = true, bool isMultiPart = true, DynamicSchemaColumn? columnSchema = null)
{
if (node.Host is DynamicParser.Node.Argument && IsTableAlias(node.Name))
{
decorate = false;
isMultiPart = false;
}
string parent = null;
if (node.Host != null)
{
if (isMultiPart && node.Host is DynamicParser.Node.GetMember && IsTable(node.Host.Name, null))
{
if (node.Host.Host != null && node.Host.Host is DynamicParser.Node.GetMember && IsTable(node.Name, node.Host.Name))
parent = string.Format("{0}.{1}", Parse(node.Host.Host, pars, isMultiPart: false), Parse(node.Host, pars, isMultiPart: false));
else
parent = Parse(node.Host, pars, isMultiPart: false);
}
else if (isMultiPart)
parent = Parse(node.Host, pars, isMultiPart: isMultiPart);
}
////string parent = node.Host == null || !isMultiPart ? null : Parse(node.Host, pars, isMultiPart: !IsTable(node.Name, node.Host.Name));
string name = parent == null ?
decorate ? Database.DecorateName(node.Name) : node.Name :
string.Format("{0}.{1}", parent, decorate ? Database.DecorateName(node.Name) : node.Name);
columnSchema = GetColumnFromSchema(name);
string value = Parse(node.Value, pars, nulls: true, columnSchema: columnSchema);
return string.Format("{0} = ({1})", name, value);
}
protected virtual string ParseUnary(DynamicParser.Node.Unary node, IDictionary<string, IParameter> pars = null)
{
switch (node.Operation)
{
// Artifacts from the DynamicParser class that are not usefull here...
case ExpressionType.IsFalse:
case ExpressionType.IsTrue: return Parse(node.Target, pars);
// Unary supported operations...
case ExpressionType.Not: return string.Format("(NOT {0})", Parse(node.Target, pars));
case ExpressionType.Negate: return string.Format("!({0})", Parse(node.Target, pars));
}
throw new ArgumentException("Not supported unary operation: " + node);
}
protected virtual string ParseBinary(DynamicParser.Node.Binary node, IDictionary<string, IParameter> pars = null)
{
string op = string.Empty;
switch (node.Operation)
{
// Arithmetic binary operations...
case ExpressionType.Add: op = "+"; break;
case ExpressionType.Subtract: op = "-"; break;
case ExpressionType.Multiply: op = "*"; break;
case ExpressionType.Divide: op = "/"; break;
case ExpressionType.Modulo: op = "%"; break;
case ExpressionType.Power: op = "^"; break;
case ExpressionType.And: op = "AND"; break;
case ExpressionType.Or: op = "OR"; break;
// Logical comparisons...
case ExpressionType.GreaterThan: op = ">"; break;
case ExpressionType.GreaterThanOrEqual: op = ">="; break;
case ExpressionType.LessThan: op = "<"; break;
case ExpressionType.LessThanOrEqual: op = "<="; break;
// Comparisons against 'NULL' require the 'IS' or 'IS NOT' operator instead the numeric ones...
case ExpressionType.Equal: op = node.Right == null && !VirtualMode ? "IS" : "="; break;
case ExpressionType.NotEqual: op = node.Right == null && !VirtualMode ? "IS NOT" : "<>"; break;
default: throw new ArgumentException("Not supported operator: '" + node.Operation);
}
DynamicSchemaColumn? columnSchema = null;
string left = Parse(node.Left, pars, columnSchema: columnSchema); // Not nulls: left is assumed to be an object
string right = Parse(node.Right, pars, nulls: true, columnSchema: columnSchema);
return string.Format("({0} {1} {2})", left, op, right);
}
protected virtual string ParseMethod(DynamicParser.Node.Method node, IDictionary<string, IParameter> pars = null)
{
string method = node.Name.ToUpper();
string parent = node.Host == null ? null : Parse(node.Host, pars: pars);
string item = null;
// Root-level methods...
if (node.Host == null)
{
switch (method)
{
case "NOT":
if (node.Arguments == null || node.Arguments.Length != 1) throw new ArgumentNullException("NOT method expects one argument: " + node.Arguments.Sketch());
item = Parse(node.Arguments[0], pars: pars);
return string.Format("(NOT {0})", item);
}
}
// Column-level methods...
if (node.Host != null)
{
switch (method)
{
case "BETWEEN":
{
if (node.Arguments == null || node.Arguments.Length == 0)
throw new ArgumentException("BETWEEN method expects at least one argument: " + node.Arguments.Sketch());
if (node.Arguments.Length > 2)
throw new ArgumentException("BETWEEN method expects at most two arguments: " + node.Arguments.Sketch());
var arguments = node.Arguments;
if (arguments.Length == 1 && (arguments[0] is IEnumerable<object> || arguments[0] is Array) && !(arguments[0] is byte[]))
{
var vals = arguments[0] as IEnumerable<object>;
if (vals == null && arguments[0] is Array)
vals = ((Array)arguments[0]).Cast<object>() as IEnumerable<object>;
if (vals != null)
arguments = vals.ToArray();
else
throw new ArgumentException("BETWEEN method expects single argument to be enumerable of exactly two elements: " + node.Arguments.Sketch());
}
return string.Format("{0} BETWEEN {1} AND {2}", parent, Parse(arguments[0], pars: pars), Parse(arguments[1], pars: pars));
}
case "IN":
{
if (node.Arguments == null || node.Arguments.Length == 0)
throw new ArgumentException("IN method expects at least one argument: " + node.Arguments.Sketch());
bool firstParam = true;
StringBuilder sbin = new StringBuilder();
foreach (var arg in node.Arguments)
{
if (!firstParam)
sbin.Append(", ");
if ((arg is IEnumerable<object> || arg is Array) && !(arg is byte[]))
{
var vals = arg as IEnumerable<object>;
if (vals == null && arg is Array)
vals = ((Array)arg).Cast<object>() as IEnumerable<object>;
if (vals != null)
foreach (var val in vals)
{
if (!firstParam)
sbin.Append(", ");
else
firstParam = false;
sbin.Append(Parse(val, pars: pars));
}
else
sbin.Append(Parse(arg, pars: pars));
}
else
sbin.Append(Parse(arg, pars: pars));
firstParam = false;
}
return string.Format("{0} IN({1})", parent, sbin.ToString());
}
case "LIKE":
if (node.Arguments == null || node.Arguments.Length != 1)
throw new ArgumentException("LIKE method expects one argument: " + node.Arguments.Sketch());
return string.Format("{0} LIKE {1}", parent, Parse(node.Arguments[0], pars: pars));
case "NOTLIKE":
if (node.Arguments == null || node.Arguments.Length != 1)
throw new ArgumentException("NOT LIKE method expects one argument: " + node.Arguments.Sketch());
return string.Format("{0} NOT LIKE {1}", parent, Parse(node.Arguments[0], pars: pars));
case "AS":
if (node.Arguments == null || node.Arguments.Length != 1)
throw new ArgumentException("AS method expects one argument: " + node.Arguments.Sketch());
item = Parse(node.Arguments[0], pars: null, rawstr: true, isMultiPart: false); // pars=null to avoid to parameterize aliases
item = item.Validated("Alias"); // Intercepting null and empty aliases
return string.Format("{0} AS {1}", parent, item);
case "COUNT":
if (node.Arguments != null && node.Arguments.Length > 1)
throw new ArgumentException("COUNT method expects one or none argument: " + node.Arguments.Sketch());
if (node.Arguments == null || node.Arguments.Length == 0)
return "COUNT(*)";
return string.Format("COUNT({0})", Parse(node.Arguments[0], pars: Parameters, nulls: true));
}
}
// Default case: parsing the method's name along with its arguments...
method = parent == null ? node.Name : string.Format("{0}.{1}", parent, node.Name);
StringBuilder sb = new StringBuilder();
sb.AppendFormat("{0}(", method);
if (node.Arguments != null && node.Arguments.Length != 0)
{
bool first = true;
foreach (object argument in node.Arguments)
{
if (!first)
sb.Append(", ");
else
first = false;
sb.Append(Parse(argument, pars, nulls: true)); // We don't accept raw strings here!!!
}
}
sb.Append(")");
return sb.ToString();
}
protected virtual string ParseInvoke(DynamicParser.Node.Invoke node, IDictionary<string, IParameter> pars = null)
{
// This is used as an especial syntax to merely concatenate its arguments. It is used as a way to extend the supported syntax without the need of treating all the possible cases...
if (node.Arguments == null || node.Arguments.Length == 0)
return string.Empty;
StringBuilder sb = new StringBuilder();
foreach (object arg in node.Arguments)
{
if (arg is string)
sb.Append((string)arg);
else
sb.Append(Parse(arg, pars, rawstr: true, nulls: true));
}
return sb.ToString();
}
protected virtual string ParseConvert(DynamicParser.Node.Convert node, IDictionary<string, IParameter> pars = null)
{
// The cast mechanism is left for the specific database implementation, that should override this method
// as needed...
string r = Parse(node.Target, pars);
return r;
}
protected virtual string ParseConstant(object node, IDictionary<string, IParameter> pars = null, DynamicSchemaColumn? columnSchema = null)
{
if (node == null && !VirtualMode)
return ParseNull();
if (pars != null)
{
bool wellKnownName = VirtualMode && node is String && ((String)node).StartsWith("[$") && ((String)node).EndsWith("]") && ((String)node).Length > 4;
// If we have a list of parameters to store it, let's parametrize it
var par = new Parameter()
{
Name = wellKnownName ? ((String)node).Substring(2, ((String)node).Length - 3) : Guid.NewGuid().ToString(),
Value = wellKnownName ? null : node,
WellKnown = wellKnownName,
Virtual = VirtualMode,
Schema = columnSchema,
};
// If we are adding parameter we inform external sources about this.
if (OnCreateTemporaryParameter != null)
OnCreateTemporaryParameter(par);
pars.Add(par.Name, par);
return string.Format("[${0}]", par.Name);
}
return node.ToString(); // Last resort case
}
protected virtual string ParseNull()
{
return "NULL"; // Override if needed
}
#endregion Parser
#region Helpers
internal bool IsTableAlias(string name)
{
DynamicQueryBuilder builder = this;
while (builder != null)
{
if (builder.Tables.Any(t => t.Alias == name))
return true;
builder = builder._parent;
}
return false;
}
internal bool IsTable(string name, string owner)
{
DynamicQueryBuilder builder = this;
while (builder != null)
{
if ((string.IsNullOrEmpty(owner) && builder.Tables.Any(t => t.Name.ToLower() == name.ToLower())) ||
(!string.IsNullOrEmpty(owner) && builder.Tables.Any(t => t.Name.ToLower() == name.ToLower() &&
!string.IsNullOrEmpty(t.Owner) && t.Owner.ToLower() == owner.ToLower())))
return true;
builder = builder._parent;
}
return false;
}
internal string FixObjectName(string main, bool onlyColumn = false)
{
if (main.IndexOf("(") > 0 && main.IndexOf(")") > 0)
return main.FillStringWithVariables(f => string.Format("({0})", FixObjectNamePrivate(f, onlyColumn)), "(", ")");
else
return FixObjectNamePrivate(main, onlyColumn);
}
private string FixObjectNamePrivate(string f, bool onlyColumn = false)
{
var objects = f.Split('.')
.Select(x => Database.StripName(x));
if (onlyColumn || objects.Count() == 1)
f = Database.DecorateName(objects.Last());
else if (!IsTableAlias(objects.First()))
f = string.Join(".", objects.Select(o => Database.DecorateName(o)));
else
f = string.Format("{0}.{1}", objects.First(), string.Join(".", objects.Skip(1).Select(o => Database.DecorateName(o))));
return f;
}
internal DynamicSchemaColumn? GetColumnFromSchema(string colName, DynamicTypeMap mapper = null, string table = null)
{
// This is tricky and will not always work unfortunetly.
if (colName.ContainsAny(StringExtensions.InvalidMultipartMemberChars))
return null;
// First we need to get real column name and it's owner if exist.
var parts = colName.Split('.')
.Select(c => Database.StripName(c))
.ToArray();
var columnName = parts.Last();
// Get table name from mapper
string tableName = table;
if (string.IsNullOrEmpty(tableName))
{
tableName = (mapper != null && mapper.Table != null) ? mapper.Table.Name : string.Empty;
if (parts.Length > 1 && string.IsNullOrEmpty(tableName))
{
// OK, we have a multi part identifier, that's good, we can get table name
tableName = string.Join(".", parts.Take(parts.Length - 1));
}
}
// Try to get table info from cache
var tableInfo = !string.IsNullOrEmpty(tableName) ?
Tables.FirstOrDefault(x => !string.IsNullOrEmpty(x.Alias) && x.Alias.ToLower() == tableName) ??
Tables.FirstOrDefault(x => x.Name.ToLower() == tableName.ToLower()) ?? Tables.FirstOrDefault() :
this is DynamicModifyBuilder ? Tables.FirstOrDefault() : null;
// Try to get column from schema
if (tableInfo != null && tableInfo.Schema != null)
return tableInfo.Schema.TryGetNullable(columnName.ToLower());
// Well, we failed to find a column
return null;
}
#endregion Helpers
}
/// <summary>Implementation of dynamic select query builder.</summary>
internal class DynamicSelectQueryBuilder : DynamicQueryBuilder, IDynamicSelectQueryBuilder, DynamicQueryBuilder.IQueryWithWhere
{
private int? _top = null;
private int? _limit = null;
private int? _offset = null;
private bool _distinct = false;
private string _select;
private string _from;
private string _join;
private string _groupby;
private string _orderby;
/// <summary>
/// Gets a value indicating whether this instance has select columns.
/// </summary>
public bool HasSelectColumns { get { return !string.IsNullOrEmpty(_select); } }
/// <summary>
/// Initializes a new instance of the <see cref="DynamicSelectQueryBuilder"/> class.
/// </summary>
/// <param name="db">The database.</param>
public DynamicSelectQueryBuilder(DynamicDatabase db)
: base(db)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="DynamicSelectQueryBuilder"/> class.
/// </summary>
/// <param name="db">The database.</param>
/// <param name="parent">The parent query.</param>
internal DynamicSelectQueryBuilder(DynamicDatabase db, DynamicQueryBuilder parent)
: base(db, parent)
{
}
/// <summary>Generates the text this command will execute against the underlying database.</summary>
/// <returns>The text to execute against the underlying database.</returns>
public override string CommandText()
{
StringBuilder sb = new StringBuilder("SELECT");
if (_distinct) sb.AppendFormat(" DISTINCT");
if (_top.HasValue) sb.AppendFormat(" TOP {0}", _top);
if (_select != null) sb.AppendFormat(" {0}", _select); else sb.Append(" *");
if (_from != null) sb.AppendFormat(" FROM {0}", _from);
if (_join != null) sb.AppendFormat(" {0}", _join);
if (WhereCondition != null) sb.AppendFormat(" WHERE {0}", WhereCondition);
if (_groupby != null) sb.AppendFormat(" GROUP BY {0}", _groupby);
if (_orderby != null) sb.AppendFormat(" ORDER BY {0}", _orderby);
if (_limit.HasValue) sb.AppendFormat(" LIMIT {0}", _limit);
if (_offset.HasValue) sb.AppendFormat(" OFFSET {0}", _offset);
return sb.ToString();
}
#region Execution
/*/// <summary>Execute this builder.</summary>
/// <returns>Enumerator of objects expanded from query.</returns>
public virtual IEnumerator<dynamic> GetEnumerator()
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
{
using (var rdr = cmd
.SetCommand(this)
.ExecuteReader())
while (rdr.Read())
{
dynamic val = null;
// Work around to avoid yield being in try...catchblock:
// http://stackoverflow.com/questions/346365/why-cant-yield-return-appear-inside-a-try-block-with-a-catch
try
{
val = rdr.RowToDynamic();
}
catch (ArgumentException argex)
{
var sb = new StringBuilder();
cmd.Dump(sb);
throw new ArgumentException(string.Format("{0}{1}{2}", argex.Message, Environment.NewLine, sb),
argex.InnerException.NullOr(a => a, argex));
}
yield return val;
}
}
}
/// <summary>Execute this builder.</summary>
/// <returns>Enumerator of objects expanded from query.</returns>
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
return GetEnumerator();
}*/
/// <summary>Execute this builder.</summary>
/// <returns>Enumerator of objects expanded from query.</returns>
public virtual IEnumerable<dynamic> Execute()
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
using (var rdr = cmd
.SetCommand(this)
.ExecuteReader())
while (rdr.Read())
{
dynamic val = null;
// Work around to avoid yield being in try...catchblock:
// http://stackoverflow.com/questions/346365/why-cant-yield-return-appear-inside-a-try-block-with-a-catch
try
{
val = rdr.RowToDynamic();
}
catch (ArgumentException argex)
{
var sb = new StringBuilder();
cmd.Dump(sb);
throw new ArgumentException(string.Format("{0}{1}{2}", argex.Message, Environment.NewLine, sb),
argex.InnerException.NullOr(a => a, argex));
}
yield return val;
}
}
/// <summary>Execute this builder and map to given type.</summary>
/// <typeparam name="T">Type of object to map on.</typeparam>
/// <returns>Enumerator of objects expanded from query.</returns>
public virtual IEnumerable<T> Execute<T>() where T : class
{
var mapper = DynamicMapperCache.GetMapper<T>();
if (mapper == null)
throw new InvalidOperationException("Type can't be mapped for unknown reason.");
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
{
using (var rdr = cmd
.SetCommand(this)
.ExecuteReader())
while (rdr.Read())
{
dynamic val = null;
// Work around to avoid yield being in try...catchblock:
// http://stackoverflow.com/questions/346365/why-cant-yield-return-appear-inside-a-try-block-with-a-catch
try
{
val = rdr.RowToDynamic();
}
catch (ArgumentException argex)
{
var sb = new StringBuilder();
cmd.Dump(sb);
throw new ArgumentException(string.Format("{0}{1}{2}", argex.Message, Environment.NewLine, sb),
argex.InnerException.NullOr(a => a, argex));
}
yield return mapper.Create(val) as T;
}
}
}
/// <summary>Execute this builder as a data reader.</summary>
/// <param name="reader">Action containing reader.</param>
public virtual void ExecuteDataReader(Action<IDataReader> reader)
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
using (var rdr = cmd
.SetCommand(this)
.ExecuteReader())
reader(rdr);
}
/// <summary>Returns a single result.</summary>
/// <returns>Result of a query.</returns>
public virtual object Scalar()
{
using (var con = Database.Open())
using (var cmd = con.CreateCommand())
{
return cmd
.SetCommand(this)
.ExecuteScalar();
}
}
#endregion Execution
#region From/Join
/// <summary>
/// Adds to the 'From' clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: 'x => "Table AS Alias', where the alias part is optional.</para>
/// <para>- Resolve to an expression: 'x => x.Table.As( x.Alias )', where the alias part is optional.</para>
/// <para>- Generic expression: 'x => x( expression ).As( x.Alias )', where the alias part is mandatory. In this
/// case the alias is not annotated.</para>
/// </summary>
/// <param name="fn">The specification.</param>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicSelectQueryBuilder From(Func<dynamic, object> fn, params Func<dynamic, object>[] func)
{
if (fn == null)
throw new ArgumentNullException("Array of functions cannot be or contain null.");
int index = FromFunc(-1, fn);
foreach (var f in func)
index = FromFunc(index, f);
return this;
}
private int FromFunc(int index, Func<dynamic, object> f)
{
if (f == null)
throw new ArgumentNullException("Array of functions cannot be or contain null.");
index++;
ITableInfo tableInfo = null;
using (var parser = DynamicParser.Parse(f))
{
var result = parser.Result;
// If the expression result is string.
if (result is string)
{
var node = (string)result;
var tuple = node.SplitSomethingAndAlias();
var parts = tuple.Item1.Split('.');
tableInfo = new TableInfo(Database,
Database.StripName(parts.Last()).Validated("Table"),
tuple.Item2.Validated("Alias", canbeNull: true),
parts.Length == 2 ? Database.StripName(parts.First()).Validated("Owner", canbeNull: true) : null);
}
else if (result is Type)
{
Type type = (Type)result;
if (type.IsAnonymous())
throw new InvalidOperationException(string.Format("Cant assign anonymous type as a table ({0}). Parsing {1}", type.FullName, result));
var mapper = DynamicMapperCache.GetMapper(type);
if (mapper == null)
throw new InvalidOperationException(string.Format("Cant assign unmapable type as a table ({0}). Parsing {1}", type.FullName, result));
tableInfo = new TableInfo(Database, type);
}
else if (result is DynamicParser.Node)
{
// Or if it resolves to a dynamic node
var node = (DynamicParser.Node)result;
string owner = null;
string main = null;
string alias = null;
Type type = null;
while (true)
{
// Support for the AS() virtual method...
if (node is DynamicParser.Node.Method && ((DynamicParser.Node.Method)node).Name.ToUpper() == "AS")
{
if (alias != null)
throw new ArgumentException(string.Format("Alias '{0}' is already set when parsing '{1}'.", alias, result));
object[] args = ((DynamicParser.Node.Method)node).Arguments;
if (args == null)
throw new ArgumentNullException("arg", "AS() is not a parameterless method.");
if (args.Length != 1)
throw new ArgumentException("AS() requires one and only one parameter: " + args.Sketch());
alias = Parse(args[0], rawstr: true, decorate: false).Validated("Alias");
node = node.Host;
continue;
}
/*if (node is DynamicParser.Node.Method && ((DynamicParser.Node.Method)node).Name.ToUpper() == "subquery")
{
main = Parse(this.SubQuery(((DynamicParser.Node.Method)node).Arguments.Where(p => p is Func<dynamic, object>).Cast<Func<dynamic, object>>().ToArray()), Parameters);
continue;
}*/
// Support for table specifications...
if (node is DynamicParser.Node.GetMember)
{
if (owner != null)
throw new ArgumentException(string.Format("Owner '{0}.{1}' is already set when parsing '{2}'.", owner, main, result));
if (main != null)
owner = ((DynamicParser.Node.GetMember)node).Name;
else
main = ((DynamicParser.Node.GetMember)node).Name;
node = node.Host;
continue;
}
// Support for generic sources...
if (node is DynamicParser.Node.Invoke)
{
if (owner != null)
throw new ArgumentException(string.Format("Owner '{0}.{1}' is already set when parsing '{2}'.", owner, main, result));
if (main != null)
owner = string.Format("{0}", Parse(node, rawstr: true, pars: Parameters));
else
{
var invoke = (DynamicParser.Node.Invoke)node;
if (invoke.Arguments.Length == 1 && invoke.Arguments[0] is Type)
{
type = (Type)invoke.Arguments[0];
if (type.IsAnonymous())
throw new InvalidOperationException(string.Format("Cant assign anonymous type as a table ({0}). Parsing {1}", type.FullName, result));
var mapper = DynamicMapperCache.GetMapper(type);
if (mapper == null)
throw new InvalidOperationException(string.Format("Cant assign unmapable type as a table ({0}). Parsing {1}", type.FullName, result));
main = mapper.Table == null || string.IsNullOrEmpty(mapper.Table.Name) ?
mapper.Type.Name : mapper.Table.Name;
owner = (mapper.Table != null) ? mapper.Table.Owner : owner;
}
else
main = string.Format("{0}", Parse(node, rawstr: true, pars: Parameters));
}
node = node.Host;
continue;
}
// Just finished the parsing...
if (node is DynamicParser.Node.Argument) break;
// All others are assumed to be part of the main element...
if (main != null)
main = Parse(node, pars: Parameters);
else
main = Parse(node, pars: Parameters);
break;
}
if (!string.IsNullOrEmpty(main))
tableInfo = type == null ? new TableInfo(Database, main, alias, owner) : new TableInfo(Database, type, alias, owner);
else
throw new ArgumentException(string.Format("Specification #{0} is invalid: {1}", index, result));
}
// Or it is a not supported expression...
if (tableInfo == null)
throw new ArgumentException(string.Format("Specification #{0} is invalid: {1}", index, result));
Tables.Add(tableInfo);
// We finally add the contents...
StringBuilder sb = new StringBuilder();
if (!string.IsNullOrEmpty(tableInfo.Owner))
sb.AppendFormat("{0}.", Database.DecorateName(tableInfo.Owner));
sb.Append(tableInfo.Name.ContainsAny(StringExtensions.InvalidMemberChars) ? tableInfo.Name : Database.DecorateName(tableInfo.Name));
if (!string.IsNullOrEmpty(tableInfo.Alias))
sb.AppendFormat(" AS {0}", tableInfo.Alias);
_from = string.IsNullOrEmpty(_from) ? sb.ToString() : string.Format("{0}, {1}", _from, sb.ToString());
}
return index;
}
/// <summary>
/// Adds to the 'Join' clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: 'x => "Table AS Alias ON Condition', where the alias part is optional.</para>
/// <para>- Resolve to an expression: 'x => x.Table.As( x.Alias ).On( condition )', where the alias part is optional.</para>
/// <para>- Generic expression: 'x => x( expression ).As( x.Alias ).On( condition )', where the alias part is mandatory.
/// In this case the alias is not annotated.</para>
/// The expression might be prepended by a method that, in this case, is used to specify the specific join type you
/// want to perform, as in: 'x => x.Left()...". Two considerations apply:
/// <para>- If a 'false' argument is used when no 'Join' part appears in its name, then no 'Join' suffix is added
/// with a space in between.</para>
/// <para>- If a 'false' argument is used when a 'Join' part does appear, then no split is performed to separate the
/// 'Join' part.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicSelectQueryBuilder Join(params Func<dynamic, object>[] func)
{
// We need to do two passes to add aliases first.
return JoinInternal(true, func).JoinInternal(false, func);
}
/// <summary>
/// Adds to the 'Join' clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: 'x => "Table AS Alias ON Condition', where the alias part is optional.</para>
/// <para>- Resolve to an expression: 'x => x.Table.As( x.Alias ).On( condition )', where the alias part is optional.</para>
/// <para>- Generic expression: 'x => x( expression ).As( x.Alias ).On( condition )', where the alias part is mandatory.
/// In this case the alias is not annotated.</para>
/// The expression might be prepended by a method that, in this case, is used to specify the specific join type you
/// want to perform, as in: 'x => x.Left()...". Two considerations apply:
/// <para>- If a 'false' argument is used when no 'Join' part appears in its name, then no 'Join' suffix is added
/// with a space in between.</para>
/// <para>- If a 'false' argument is used when a 'Join' part does appear, then no split is performed to separate the
/// 'Join' part.</para>
/// </summary>
/// <param name="justAddTables">If <c>true</c> just pass by to locate tables and aliases, otherwise create rules.</param>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
protected virtual DynamicSelectQueryBuilder JoinInternal(bool justAddTables, params Func<dynamic, object>[] func)
{
if (func == null) throw new ArgumentNullException("Array of functions cannot be null.");
int index = -1;
foreach (var f in func)
{
index++;
ITableInfo tableInfo = null;
if (f == null)
throw new ArgumentNullException(string.Format("Specification #{0} cannot be null.", index));
using (var parser = DynamicParser.Parse(f))
{
var result = parser.Result;
if (result == null) throw new ArgumentException(string.Format("Specification #{0} resolves to null.", index));
string type = null;
string main = null;
string owner = null;
string alias = null;
string condition = null;
Type tableType = null;
// If the expression resolves to a string...
if (result is string)
{
var node = (string)result;
int n = node.ToUpper().IndexOf("JOIN ");
if (n < 0)
main = node;
else
{
// For strings we only accept 'JOIN' as a suffix
type = node.Substring(0, n + 4);
main = node.Substring(n + 4);
}
n = main.ToUpper().IndexOf("ON");
if (n >= 0)
{
condition = main.Substring(n + 3);
main = main.Substring(0, n).Trim();
}
var tuple = main.SplitSomethingAndAlias(); // In this case we split on the remaining 'main'
var parts = tuple.Item1.Split('.');
main = Database.StripName(parts.Last()).Validated("Table");
owner = parts.Length == 2 ? Database.StripName(parts.First()).Validated("Owner", canbeNull: true) : null;
alias = tuple.Item2.Validated("Alias", canbeNull: true);
}
else if (result is DynamicParser.Node)
{
// Or if it resolves to a dynamic node...
var node = (DynamicParser.Node)result;
while (true)
{
// Support for the ON() virtual method...
if (node is DynamicParser.Node.Method && ((DynamicParser.Node.Method)node).Name.ToUpper() == "ON")
{
if (condition != null)
throw new ArgumentException(string.Format("Condition '{0}' is already set when parsing '{1}'.", alias, result));
object[] args = ((DynamicParser.Node.Method)node).Arguments;
if (args == null)
throw new ArgumentNullException("arg", "ON() is not a parameterless method.");
if (args.Length != 1)
throw new ArgumentException("ON() requires one and only one parameter: " + args.Sketch());
condition = Parse(args[0], rawstr: true, pars: justAddTables ? null : Parameters);
node = node.Host;
continue;
}
// Support for the AS() virtual method...
if (node is DynamicParser.Node.Method && ((DynamicParser.Node.Method)node).Name.ToUpper() == "AS")
{
if (alias != null)
throw new ArgumentException(string.Format("Alias '{0}' is already set when parsing '{1}'.", alias, result));
object[] args = ((DynamicParser.Node.Method)node).Arguments;
if (args == null)
throw new ArgumentNullException("arg", "AS() is not a parameterless method.");
if (args.Length != 1)
throw new ArgumentException("AS() requires one and only one parameter: " + args.Sketch());
alias = Parse(args[0], rawstr: true, decorate: false, isMultiPart: false).Validated("Alias");
node = node.Host;
continue;
}
// Support for table specifications...
if (node is DynamicParser.Node.GetMember)
{
if (owner != null)
throw new ArgumentException(string.Format("Owner '{0}.{1}' is already set when parsing '{2}'.", owner, main, result));
if (main != null)
owner = ((DynamicParser.Node.GetMember)node).Name;
else
main = ((DynamicParser.Node.GetMember)node).Name;
node = node.Host;
continue;
}
// Support for Join Type specifications...
if (node is DynamicParser.Node.Method && (node.Host is DynamicParser.Node.Argument || node.Host is DynamicParser.Node.Invoke))
{
if (type != null) throw new ArgumentException(string.Format("Join type '{0}' is already set when parsing '{1}'.", main, result));
type = ((DynamicParser.Node.Method)node).Name;
bool avoid = false;
object[] args = ((DynamicParser.Node.Method)node).Arguments;
if (args != null && args.Length > 0)
{
avoid = args[0] is bool && !((bool)args[0]);
var proposedType = args.FirstOrDefault(a => a is string) as string;
if (!string.IsNullOrEmpty(proposedType))
type = proposedType;
}
type = type.ToUpper(); // Normalizing, and stepping out the trivial case...
if (type != "JOIN")
{
// Special cases
// x => x.LeftOuter() / x => x.RightOuter()...
type = type.Replace("OUTER", " OUTER ")
.Replace(" ", " ")
.Trim(' ');
// x => x.Left()...
int n = type.IndexOf("JOIN");
if (n < 0 && !avoid)
type += " JOIN";
// x => x.InnerJoin() / x => x.JoinLeft() ...
else
{
if (!avoid)
{
if (n == 0) type = type.Replace("JOIN", "JOIN ");
else type = type.Replace("JOIN", " JOIN");
}
}
}
node = node.Host;
continue;
}
// Support for generic sources...
if (node is DynamicParser.Node.Invoke)
{
if (owner != null)
throw new ArgumentException(string.Format("Owner '{0}.{1}' is already set when parsing '{2}'.", owner, main, result));
if (main != null)
owner = string.Format("{0}", Parse(node, rawstr: true, pars: justAddTables ? null : Parameters));
else
{
var invoke = (DynamicParser.Node.Invoke)node;
if (invoke.Arguments.Length == 1 && invoke.Arguments[0] is Type)
{
tableType = (Type)invoke.Arguments[0];
var mapper = DynamicMapperCache.GetMapper(tableType);
if (mapper == null)
throw new InvalidOperationException(string.Format("Cant assign unmapable type as a table ({0}).", tableType.FullName));
main = mapper.Table == null || string.IsNullOrEmpty(mapper.Table.Name) ?
mapper.Type.Name : mapper.Table.Name;
owner = (mapper.Table != null) ? mapper.Table.Owner : owner;
}
else
main = string.Format("{0}", Parse(node, rawstr: true, pars: justAddTables ? null : Parameters));
}
node = node.Host;
continue;
}
// Just finished the parsing...
if (node is DynamicParser.Node.Argument) break;
throw new ArgumentException(string.Format("Specification #{0} is invalid: {1}", index, result));
}
}
else
{
// Or it is a not supported expression...
throw new ArgumentException(string.Format("Specification #{0} is invalid: {1}", index, result));
}
// We annotate the aliases being conservative...
main = main.Validated("Main");
if (justAddTables)
{
if (!string.IsNullOrEmpty(main))
tableInfo = tableType == null ? new TableInfo(Database, main, alias, owner) : new TableInfo(Database, tableType, alias, owner);
else
throw new ArgumentException(string.Format("Specification #{0} is invalid: {1}", index, result));
Tables.Add(tableInfo);
}
else
{
// Get cached table info
tableInfo = string.IsNullOrEmpty(alias) ?
Tables.SingleOrDefault(t => t.Name == main && string.IsNullOrEmpty(t.Alias)) :
Tables.SingleOrDefault(t => t.Alias == alias);
// We finally add the contents if we can...
StringBuilder sb = new StringBuilder();
if (string.IsNullOrEmpty(type))
type = "JOIN";
sb.AppendFormat("{0} ", type);
if (!string.IsNullOrEmpty(tableInfo.Owner))
sb.AppendFormat("{0}.", Database.DecorateName(tableInfo.Owner));
sb.Append(tableInfo.Name.ContainsAny(StringExtensions.InvalidMemberChars) ? tableInfo.Name : Database.DecorateName(tableInfo.Name));
if (!string.IsNullOrEmpty(tableInfo.Alias))
sb.AppendFormat(" AS {0}", tableInfo.Alias);
if (!string.IsNullOrEmpty(condition))
sb.AppendFormat(" ON {0}", condition);
_join = string.IsNullOrEmpty(_join) ? sb.ToString() : string.Format("{0} {1}", _join, sb.ToString()); // No comma in this case
}
}
}
return this;
}
#endregion From/Join
#region Where
/// <summary>
/// Adds to the 'Where' clause the contents obtained from parsing the dynamic lambda expression given. The condition
/// is parsed to the appropriate syntax, where the specific customs virtual methods supported by the parser are used
/// as needed.
/// <para>- If several Where() methods are chained their contents are, by default, concatenated with an 'AND' operator.</para>
/// <para>- The 'And()' and 'Or()' virtual method can be used to concatenate with an 'OR' or an 'AND' operator, as in:
/// 'Where( x => x.Or( condition ) )'.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicSelectQueryBuilder Where(Func<dynamic, object> func)
{
return this.InternalWhere(func);
}
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column with operator and value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder Where(DynamicColumn column)
{
return this.InternalWhere(column);
}
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="op">Condition operator.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder Where(string column, DynamicColumn.CompareOperator op, object value)
{
return this.InternalWhere(column, op, value);
}
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder Where(string column, object value)
{
return this.InternalWhere(column, value);
}
/// <summary>Add where condition.</summary>
/// <param name="conditions">Set conditions as properties and values of an object.</param>
/// <param name="schema">If <c>true</c> use schema to determine key columns and ignore those which
/// aren't keys.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder Where(object conditions, bool schema = false)
{
return this.InternalWhere(conditions, schema);
}
#endregion Where
#region Select
/// <summary>
/// Adds to the 'Select' clause the contents obtained by parsing the dynamic lambda expressions given. The supported
/// formats are:
/// <para>- Resolve to a string: 'x => "Table.Column AS Alias', where the alias part is optional.</para>
/// <para>- Resolve to an expression: 'x => x.Table.Column.As( x.Alias )', where the alias part is optional.</para>
/// <para>- Select all columns from a table: 'x => x.Table.All()'.</para>
/// <para>- Generic expression: 'x => x( expression ).As( x.Alias )', where the alias part is mandatory. In this case
/// the alias is not annotated.</para>
/// </summary>
/// <param name="fn">The specification.</param>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicSelectQueryBuilder Select(Func<dynamic, object> fn, params Func<dynamic, object>[] func)
{
if (fn == null)
throw new ArgumentNullException("Array of specifications cannot be null.");
int index = SelectFunc(-1, fn);
if (func != null)
foreach (var f in func)
index = SelectFunc(index, f);
return this;
}
private int SelectFunc(int index, Func<dynamic, object> f)
{
index++;
if (f == null)
throw new ArgumentNullException(string.Format("Specification #{0} cannot be null.", index));
using (var parser = DynamicParser.Parse(f))
{
var result = parser.Result;
if (result == null)
throw new ArgumentException(string.Format("Specification #{0} resolves to null.", index));
string main = null;
string alias = null;
bool all = false;
bool anon = false;
// If the expression resolves to a string...
if (result is string)
{
var node = (string)result;
var tuple = node.SplitSomethingAndAlias();
main = tuple.Item1.Validated("Table and/or Column");
main = FixObjectName(main);
alias = tuple.Item2.Validated("Alias", canbeNull: true);
}
else if (result is DynamicParser.Node)
{
// Or if it resolves to a dynamic node...
ParseSelectNode(result, ref main, ref alias, ref all);
}
else if (result.GetType().IsAnonymous())
{
anon = true;
foreach (var prop in result.ToDictionary())
{
if (prop.Value is string)
{
var node = (string)prop.Value;
var tuple = node.SplitSomethingAndAlias();
main = FixObjectName(tuple.Item1.Validated("Table and/or Column"));
////alias = tuple.Item2.Validated("Alias", canbeNull: true);
}
else if (prop.Value is DynamicParser.Node)
{
// Or if it resolves to a dynamic node...
ParseSelectNode(prop.Value, ref main, ref alias, ref all);
}
else
{
// Or it is a not supported expression...
throw new ArgumentException(string.Format("Specification #{0} in anonymous type is invalid: {1}", index, prop.Value));
}
alias = Database.DecorateName(prop.Key);
ParseSelectAddColumn(main, alias, all);
}
}
else
{
// Or it is a not supported expression...
throw new ArgumentException(string.Format("Specification #{0} is invalid: {1}", index, result));
}
if (!anon)
ParseSelectAddColumn(main, alias, all);
}
return index;
}
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to add to object.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder SelectColumn(params DynamicColumn[] columns)
{
foreach (var col in columns)
Select(x => col.ToSQLSelectColumn(Database));
return this;
}
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to add to object.</param>
/// <remarks>Column format consist of <c>Column Name</c>, <c>Alias</c> and
/// <c>Aggregate function</c> in this order separated by '<c>:</c>'.</remarks>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder SelectColumn(params string[] columns)
{
return SelectColumn(columns.Select(c => DynamicColumn.ParseSelectColumn(c)).ToArray());
}
#endregion Select
#region GroupBy
/// <summary>
/// Adds to the 'Group By' clause the contents obtained from from parsing the dynamic lambda expression given.
/// </summary>
/// <param name="fn">The specification.</param>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicSelectQueryBuilder GroupBy(Func<dynamic, object> fn, params Func<dynamic, object>[] func)
{
if (fn == null)
throw new ArgumentNullException("Array of specifications cannot be null.");
int index = GroupByFunc(-1, fn);
if (func != null)
foreach (var f in func)
index = GroupByFunc(index, f);
return this;
}
private int GroupByFunc(int index, Func<dynamic, object> f)
{
index++;
if (f == null)
throw new ArgumentNullException(string.Format("Specification #{0} cannot be null.", index));
using (var parser = DynamicParser.Parse(f))
{
var result = parser.Result;
if (result == null)
throw new ArgumentException(string.Format("Specification #{0} resolves to null.", index));
string main = null;
if (result is string)
main = FixObjectName(result as string);
else
main = Parse(result, pars: Parameters);
main = main.Validated("Group By");
if (_groupby == null)
_groupby = main;
else
_groupby = string.Format("{0}, {1}", _groupby, main);
}
return index;
}
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to group by.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder GroupByColumn(params DynamicColumn[] columns)
{
foreach (var col in columns)
GroupBy(x => col.ToSQLGroupByColumn(Database));
return this;
}
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to group by.</param>
/// <remarks>Column format consist of <c>Column Name</c> and
/// <c>Alias</c> in this order separated by '<c>:</c>'.</remarks>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder GroupByColumn(params string[] columns)
{
return GroupByColumn(columns.Select(c => DynamicColumn.ParseSelectColumn(c)).ToArray());
}
#endregion GroupBy
#region OrderBy
/// <summary>
/// Adds to the 'Order By' clause the contents obtained from from parsing the dynamic lambda expression given. It
/// accepts a multipart column specification followed by an optional <code>Ascending()</code> or <code>Descending()</code> virtual methods
/// to specify the direction. If no virtual method is used, the default is ascending order. You can also use the
/// shorter versions <code>Asc()</code> and <code>Desc()</code>.
/// </summary>
/// <param name="fn">The specification.</param>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicSelectQueryBuilder OrderBy(Func<dynamic, object> fn, params Func<dynamic, object>[] func)
{
if (fn == null)
throw new ArgumentNullException("Array of specifications cannot be null.");
int index = OrderByFunc(-1, fn);
if (func != null)
foreach (var f in func)
index = OrderByFunc(index, f);
return this;
}
private int OrderByFunc(int index, Func<dynamic, object> f)
{
index++;
if (f == null)
throw new ArgumentNullException(string.Format("Specification #{0} cannot be null.", index));
using (var parser = DynamicParser.Parse(f))
{
var result = parser.Result;
if (result == null) throw new ArgumentException(string.Format("Specification #{0} resolves to null.", index));
string main = null;
bool ascending = true;
if (result is int)
main = result.ToString();
else if (result is string)
{
var parts = ((string)result).Split(' ');
main = Database.StripName(parts.First());
int colNo;
if (!Int32.TryParse(main, out colNo))
main = FixObjectName(main);
ascending = parts.Length != 2 || parts.Last().ToUpper() == "ASCENDING" || parts.Last().ToUpper() == "ASC";
}
else
{
// Intercepting trailing 'Ascending' or 'Descending' virtual methods...
if (result is DynamicParser.Node.Method)
{
var node = (DynamicParser.Node.Method)result;
var name = node.Name.ToUpper();
if (name == "ASCENDING" || name == "ASC" || name == "DESCENDING" || name == "DESC")
{
object[] args = node.Arguments;
if (args != null && !(node.Host is DynamicParser.Node.Argument))
throw new ArgumentException(string.Format("{0} must be a parameterless method, but found: {1}.", name, args.Sketch()));
else if ((args == null || args.Length != 1) && node.Host is DynamicParser.Node.Argument)
throw new ArgumentException(string.Format("{0} requires one numeric parameter, but found: {1}.", name, args.Sketch()));
ascending = (name == "ASCENDING" || name == "ASC") ? true : false;
if (args != null && args.Length == 1)
{
int col = -1;
if (args[0] is int)
main = args[0].ToString();
else if (args[0] is string)
{
if (Int32.TryParse(args[0].ToString(), out col))
main = col.ToString();
else
main = FixObjectName(args[0].ToString());
}
else
main = Parse(args[0], pars: Parameters);
}
result = node.Host;
}
}
// Just parsing the contents...
if (!(result is DynamicParser.Node.Argument))
main = Parse(result, pars: Parameters);
}
main = main.Validated("Order By");
main = string.Format("{0} {1}", main, ascending ? "ASC" : "DESC");
if (_orderby == null)
_orderby = main;
else
_orderby = string.Format("{0}, {1}", _orderby, main);
}
return index;
}
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to order by.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder OrderByColumn(params DynamicColumn[] columns)
{
foreach (var col in columns)
OrderBy(x => col.ToSQLOrderByColumn(Database));
return this;
}
/// <summary>Add select columns.</summary>
/// <param name="columns">Columns to order by.</param>
/// <remarks>Column format consist of <c>Column Name</c> and
/// <c>Alias</c> in this order separated by '<c>:</c>'.</remarks>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder OrderByColumn(params string[] columns)
{
return OrderByColumn(columns.Select(c => DynamicColumn.ParseOrderByColumn(c)).ToArray());
}
#endregion OrderBy
#region Top/Limit/Offset/Distinct
/// <summary>Set top if database support it.</summary>
/// <param name="top">How many objects select.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder Top(int? top)
{
if ((Database.Options & DynamicDatabaseOptions.SupportTop) != DynamicDatabaseOptions.SupportTop)
throw new NotSupportedException("Database doesn't support TOP clause.");
_top = top;
return this;
}
/// <summary>Set top if database support it.</summary>
/// <param name="limit">How many objects select.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder Limit(int? limit)
{
if ((Database.Options & DynamicDatabaseOptions.SupportLimitOffset) != DynamicDatabaseOptions.SupportLimitOffset)
throw new NotSupportedException("Database doesn't support LIMIT clause.");
_limit = limit;
return this;
}
/// <summary>Set top if database support it.</summary>
/// <param name="offset">How many objects skip selecting.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder Offset(int? offset)
{
if ((Database.Options & DynamicDatabaseOptions.SupportLimitOffset) != DynamicDatabaseOptions.SupportLimitOffset)
throw new NotSupportedException("Database doesn't support OFFSET clause.");
_offset = offset;
return this;
}
/// <summary>Set distinct mode.</summary>
/// <param name="distinct">Distinct mode.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicSelectQueryBuilder Distinct(bool distinct = true)
{
_distinct = distinct;
return this;
}
#endregion Top/Limit/Offset/Distinct
#region Helpers
private void ParseSelectAddColumn(string main, string alias, bool all)
{
// We annotate the aliases being conservative...
main = main.Validated("Main");
////if (alias != null && !main.ContainsAny(StringExtensions.InvalidMemberChars)) TableAliasList.Add(new KTableAlias(main, alias));
// If all columns are requested...
if (all)
main += ".*";
// We finally add the contents...
string str = (alias == null || all) ? main : string.Format("{0} AS {1}", main, alias);
_select = _select == null ? str : string.Format("{0}, {1}", _select, str);
}
private void ParseSelectNode(object result, ref string column, ref string alias, ref bool all)
{
string main = null;
var node = (DynamicParser.Node)result;
while (true)
{
// Support for the AS() virtual method...
if (node is DynamicParser.Node.Method && ((DynamicParser.Node.Method)node).Name.ToUpper() == "AS")
{
if (alias != null)
throw new ArgumentException(string.Format("Alias '{0}' is already set when parsing '{1}'.", alias, result));
object[] args = ((DynamicParser.Node.Method)node).Arguments;
if (args == null)
throw new ArgumentNullException("arg", "AS() is not a parameterless method.");
if (args.Length != 1)
throw new ArgumentException("AS() requires one and only one parameter: " + args.Sketch());
// Yes, we decorate columns
alias = Parse(args[0], rawstr: true, decorate: true, isMultiPart: false).Validated("Alias");
node = node.Host;
continue;
}
// Support for the ALL() virtual method...
if (node is DynamicParser.Node.Method && ((DynamicParser.Node.Method)node).Name.ToUpper() == "ALL")
{
if (all)
throw new ArgumentException(string.Format("Flag to select all columns is already set when parsing '{0}'.", result));
object[] args = ((DynamicParser.Node.Method)node).Arguments;
if (args != null)
throw new ArgumentException("ALL() must be a parameterless virtual method, but found: " + args.Sketch());
all = true;
node = node.Host;
continue;
}
// Support for table and/or column specifications...
if (node is DynamicParser.Node.GetMember)
{
if (main != null)
throw new ArgumentException(string.Format("Main '{0}' is already set when parsing '{1}'.", main, result));
main = ((DynamicParser.Node.GetMember)node).Name;
if (node.Host is DynamicParser.Node.GetMember)
{
// If leaf then decorate
main = Database.DecorateName(main);
// Supporting multipart specifications...
node = node.Host;
// Get table/alias name
var table = ((DynamicParser.Node.GetMember)node).Name;
bool isAlias = node.Host is DynamicParser.Node.Argument && IsTableAlias(table);
if (isAlias)
main = string.Format("{0}.{1}", table, main);
else if (node.Host is DynamicParser.Node.GetMember)
{
node = node.Host;
main = string.Format("{0}.{1}.{2}",
Database.DecorateName(((DynamicParser.Node.GetMember)node).Name),
Database.DecorateName(table), main);
}
else
main = string.Format("{0}.{1}", Database.DecorateName(table), main);
}
else if (node.Host is DynamicParser.Node.Argument)
{
var table = ((DynamicParser.Node.Argument)node.Host).Name;
if (IsTableAlias(table))
main = string.Format("{0}.{1}", table, Database.DecorateName(main));
else if (!IsTableAlias(main))
main = Database.DecorateName(main);
}
else if (!(node.Host is DynamicParser.Node.Argument && IsTableAlias(main)))
main = Database.DecorateName(main);
node = node.Host;
continue;
}
// Support for generic sources...
if (node is DynamicParser.Node.Invoke)
{
if (main != null)
throw new ArgumentException(string.Format("Main '{0}' is already set when parsing '{1}'.", main, result));
main = string.Format("{0}", Parse(node, rawstr: true, pars: Parameters));
node = node.Host;
continue;
}
// Just finished the parsing...
if (node is DynamicParser.Node.Argument)
{
if (string.IsNullOrEmpty(main) && IsTableAlias(node.Name))
main = node.Name;
break;
}
// All others are assumed to be part of the main element...
if (main != null) throw new ArgumentException(string.Format("Main '{0}' is already set when parsing '{1}'.", main, result));
main = Parse(node, pars: Parameters);
break;
}
column = main;
}
#endregion Helpers
}
/// <summary>Update query builder.</summary>
internal class DynamicUpdateQueryBuilder : DynamicModifyBuilder, IDynamicUpdateQueryBuilder, DynamicQueryBuilder.IQueryWithWhere
{
private string _columns;
internal DynamicUpdateQueryBuilder(DynamicDatabase db)
: base(db)
{
}
public DynamicUpdateQueryBuilder(DynamicDatabase db, string tableName)
: base(db, tableName)
{
}
/// <summary>Generates the text this command will execute against the underlying database.</summary>
/// <returns>The text to execute against the underlying database.</returns>
/// <remarks>This method must be override by derived classes.</remarks>
public override string CommandText()
{
var info = Tables.Single();
return string.Format("UPDATE {0}{1} SET {2}{3}{4}",
string.IsNullOrEmpty(info.Owner) ? string.Empty : string.Format("{0}.", Database.DecorateName(info.Owner)),
Database.DecorateName(info.Name), _columns,
string.IsNullOrEmpty(WhereCondition) ? string.Empty : " WHERE ",
WhereCondition);
}
#region Update
/// <summary>Add update value or where condition using schema.</summary>
/// <param name="column">Update or where column name.</param>
/// <param name="value">Column value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicUpdateQueryBuilder Update(string column, object value)
{
DynamicSchemaColumn? col = GetColumnFromSchema(column);
if (!col.HasValue && SupportSchema)
throw new InvalidOperationException(string.Format("Column '{0}' not found in schema, can't use universal approach.", column));
if (col.HasValue && col.Value.IsKey)
Where(column, value);
else
Values(column, value);
return this;
}
/// <summary>Add update values and where condition columns using schema.</summary>
/// <param name="conditions">Set values or conditions as properties and values of an object.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicUpdateQueryBuilder Update(object conditions)
{
if (conditions is DynamicColumn)
{
var column = (DynamicColumn)conditions;
DynamicSchemaColumn? col = column.Schema ?? GetColumnFromSchema(column.ColumnName);
if (!col.HasValue && SupportSchema)
throw new InvalidOperationException(string.Format("Column '{0}' not found in schema, can't use universal approach.", column));
if (col.HasValue && col.Value.IsKey)
Where(column);
else
Values(column.ColumnName, column.Value);
return this;
}
var dict = conditions.ToDictionary();
var mapper = DynamicMapperCache.GetMapper(conditions.GetType());
foreach (var con in dict)
{
if (mapper.Ignored.Contains(con.Key))
continue;
string colName = mapper != null ? mapper.PropertyMap.TryGetValue(con.Key) ?? con.Key : con.Key;
DynamicSchemaColumn? col = GetColumnFromSchema(colName);
if (!col.HasValue && SupportSchema)
throw new InvalidOperationException(string.Format("Column '{0}' not found in schema, can't use universal approach.", colName));
if (col.HasValue)
{
colName = col.Value.Name;
if (col.Value.IsKey)
{
Where(colName, con.Value);
continue;
}
}
var propMap = mapper.ColumnsMap.TryGetValue(colName.ToLower());
if (propMap == null || propMap.Column == null || !propMap.Column.IsNoUpdate)
Values(colName, con.Value);
}
return this;
}
#endregion Update
#region Values
/// <summary>
/// Specifies the columns to update using the dynamic lambda expressions given. Each expression correspond to one
/// column, and can:
/// <para>- Resolve to a string, in this case a '=' must appear in the string.</para>
/// <para>- Resolve to a expression with the form: 'x =&gt; x.Column = Value'.</para>
/// </summary>
/// <param name="func">The specifications.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicUpdateQueryBuilder Set(params Func<dynamic, object>[] func)
{
if (func == null)
throw new ArgumentNullException("Array of specifications cannot be null.");
int index = -1;
foreach (var f in func)
{
index++;
if (f == null)
throw new ArgumentNullException(string.Format("Specification #{0} cannot be null.", index));
var result = DynamicParser.Parse(f).Result;
if (result == null)
throw new ArgumentException(string.Format("Specification #{0} resolves to null.", index));
string main = null;
string value = null;
string str = null;
// When 'x => x.Table.Column = value' or 'x => x.Column = value'...
if (result is DynamicParser.Node.SetMember)
{
var node = (DynamicParser.Node.SetMember)result;
DynamicSchemaColumn? col = GetColumnFromSchema(node.Name);
main = Database.DecorateName(node.Name);
value = Parse(node.Value, pars: Parameters, nulls: true, columnSchema: col);
str = string.Format("{0} = {1}", main, value);
_columns = _columns == null ? str : string.Format("{0}, {1}", _columns, str);
continue;
}
else if (!(result is DynamicParser.Node) && !result.GetType().IsValueType)
{
Values(result);
continue;
}
// Other specifications are considered invalid...
var err = string.Format("Specification '{0}' is invalid.", result);
str = Parse(result);
if (str.Contains("=")) err += " May have you used a '==' instead of a '=' operator?";
throw new ArgumentException(err);
}
return this;
}
/// <summary>Add insert fields.</summary>
/// <param name="column">Insert column.</param>
/// <param name="value">Insert value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicUpdateQueryBuilder Values(string column, object value)
{
if (value is DynamicColumn)
{
var v = (DynamicColumn)value;
if (string.IsNullOrEmpty(v.ColumnName))
v.ColumnName = column;
return Values(v);
}
return Values(new DynamicColumn
{
ColumnName = column,
Value = value,
});
}
/// <summary>Add insert fields.</summary>
/// <param name="o">Set insert value as properties and values of an object.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicUpdateQueryBuilder Values(object o)
{
if (o is DynamicColumn)
{
var column = (DynamicColumn)o;
DynamicSchemaColumn? col = column.Schema ?? GetColumnFromSchema(column.ColumnName);
string main = FixObjectName(column.ColumnName, onlyColumn: true);
string value = Parse(column.Value, pars: Parameters, nulls: true, columnSchema: col);
var str = string.Format("{0} = {1}", main, value);
_columns = _columns == null ? str : string.Format("{0}, {1}", _columns, str);
return this;
}
var dict = o.ToDictionary();
var mapper = DynamicMapperCache.GetMapper(o.GetType());
if (mapper != null)
{
foreach (var con in dict)
if (!mapper.Ignored.Contains(con.Key))
Values(mapper.PropertyMap.TryGetValue(con.Key) ?? con.Key, con.Value);
}
else
foreach (var con in dict)
Values(con.Key, con.Value);
return this;
}
#endregion Values
#region Where
/// <summary>
/// Adds to the 'Where' clause the contents obtained from parsing the dynamic lambda expression given. The condition
/// is parsed to the appropriate syntax, where the specific customs virtual methods supported by the parser are used
/// as needed.
/// <para>- If several Where() methods are chained their contents are, by default, concatenated with an 'AND' operator.</para>
/// <para>- The 'And()' and 'Or()' virtual method can be used to concatenate with an 'OR' or an 'AND' operator, as in:
/// 'Where( x => x.Or( condition ) )'.</para>
/// </summary>
/// <param name="func">The specification.</param>
/// <returns>This instance to permit chaining.</returns>
public virtual IDynamicUpdateQueryBuilder Where(Func<dynamic, object> func)
{
return this.InternalWhere(func);
}
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column with operator and value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicUpdateQueryBuilder Where(DynamicColumn column)
{
return this.InternalWhere(column);
}
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="op">Condition operator.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicUpdateQueryBuilder Where(string column, DynamicColumn.CompareOperator op, object value)
{
return this.InternalWhere(column, op, value);
}
/// <summary>Add where condition.</summary>
/// <param name="column">Condition column.</param>
/// <param name="value">Condition value.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicUpdateQueryBuilder Where(string column, object value)
{
return this.InternalWhere(column, value);
}
/// <summary>Add where condition.</summary>
/// <param name="conditions">Set conditions as properties and values of an object.</param>
/// <param name="schema">If <c>true</c> use schema to determine key columns and ignore those which
/// aren't keys.</param>
/// <returns>Builder instance.</returns>
public virtual IDynamicUpdateQueryBuilder Where(object conditions, bool schema = false)
{
return this.InternalWhere(conditions, schema);
}
#endregion Where
}
}
}
namespace Helpers
{
/// <summary>Defines methods to support the comparison of collections for equality.</summary>
/// <typeparam name="T">The type of collection to compare.</typeparam>
public class CollectionComparer<T> : IEqualityComparer<IEnumerable<T>>
{
/// <summary>Determines whether the specified objects are equal.</summary>
/// <param name="first">The first object of type T to compare.</param>
/// <param name="second">The second object of type T to compare.</param>
/// <returns>Returns <c>true</c> if the specified objects are equal; otherwise, <c>false</c>.</returns>
bool IEqualityComparer<IEnumerable<T>>.Equals(IEnumerable<T> first, IEnumerable<T> second)
{
return Equals(first, second);
}
/// <summary>Returns a hash code for the specified object.</summary>
/// <param name="enumerable">The enumerable for which a hash code is to be returned.</param>
/// <returns>A hash code for the specified object.</returns>
int IEqualityComparer<IEnumerable<T>>.GetHashCode(IEnumerable<T> enumerable)
{
return GetHashCode(enumerable);
}
/// <summary>Returns a hash code for the specified object.</summary>
/// <param name="enumerable">The enumerable for which a hash code is to be returned.</param>
/// <returns>A hash code for the specified object.</returns>
public static int GetHashCode(IEnumerable<T> enumerable)
{
int hash = 17;
foreach (T val in enumerable.OrderBy(x => x))
hash = (hash * 23) + val.GetHashCode();
return hash;
}
/// <summary>Determines whether the specified objects are equal.</summary>
/// <param name="first">The first object of type T to compare.</param>
/// <param name="second">The second object of type T to compare.</param>
/// <returns>Returns <c>true</c> if the specified objects are equal; otherwise, <c>false</c>.</returns>
public static bool Equals(IEnumerable<T> first, IEnumerable<T> second)
{
if ((first == null) != (second == null))
return false;
if (!object.ReferenceEquals(first, second) && (first != null))
{
if (first.Count() != second.Count())
return false;
if ((first.Count() != 0) && HaveMismatchedElement(first, second))
return false;
}
return true;
}
private static bool HaveMismatchedElement(IEnumerable<T> first, IEnumerable<T> second)
{
int firstCount;
int secondCount;
var firstElementCounts = GetElementCounts(first, out firstCount);
var secondElementCounts = GetElementCounts(second, out secondCount);
if (firstCount != secondCount)
return true;
foreach (var kvp in firstElementCounts)
if (kvp.Value != (secondElementCounts.TryGetNullable(kvp.Key) ?? 0))
return true;
return false;
}
private static Dictionary<T, int> GetElementCounts(IEnumerable<T> enumerable, out int nullCount)
{
var dictionary = new Dictionary<T, int>();
nullCount = 0;
foreach (T element in enumerable)
{
if (element == null)
nullCount++;
else
{
int count = dictionary.TryGetNullable(element) ?? 0;
dictionary[element] = ++count;
}
}
return dictionary;
}
}
/// <summary>Framework detection and specific implementations.</summary>
public static class FrameworkTools
{
#region Mono or .NET Framework detection
/// <summary>This is pretty simple trick.</summary>
private static bool _isMono = Type.GetType("Mono.Runtime") != null;
/// <summary>Gets a value indicating whether application is running under mono runtime.</summary>
public static bool IsMono { get { return _isMono; } }
#endregion Mono or .NET Framework detection
static FrameworkTools()
{
_frameworkTypeArgumentsGetter = CreateTypeArgumentsGetter();
}
#region GetGenericTypeArguments
private static Func<InvokeMemberBinder, IList<Type>> _frameworkTypeArgumentsGetter = null;
private static Func<InvokeMemberBinder, IList<Type>> CreateTypeArgumentsGetter()
{
// HACK: Creating binders assuming types are correct... this may fail.
if (IsMono)
{
var binderType = typeof(Microsoft.CSharp.RuntimeBinder.RuntimeBinderException).Assembly.GetType("Microsoft.CSharp.RuntimeBinder.CSharpInvokeMemberBinder");
if (binderType != null)
{
ParameterExpression param = Expression.Parameter(typeof(InvokeMemberBinder), "o");
return Expression.Lambda<Func<InvokeMemberBinder, IList<Type>>>(
Expression.TypeAs(
Expression.Field(
Expression.TypeAs(param, binderType), "typeArguments"),
typeof(IList<Type>)), param).Compile();
}
}
else
{
var inter = typeof(Microsoft.CSharp.RuntimeBinder.RuntimeBinderException).Assembly.GetType("Microsoft.CSharp.RuntimeBinder.ICSharpInvokeOrInvokeMemberBinder");
if (inter != null)
{
var prop = inter.GetProperty("TypeArguments");
if (!prop.CanRead)
return null;
var objParm = Expression.Parameter(typeof(InvokeMemberBinder), "o");
return Expression.Lambda<Func<InvokeMemberBinder, IList<Type>>>(
Expression.TypeAs(
Expression.Property(
Expression.TypeAs(objParm, inter), prop.Name),
typeof(IList<Type>)), objParm).Compile();
}
}
return null;
}
/// <summary>Extension method allowing to easily extract generic type
/// arguments from <see cref="InvokeMemberBinder"/> assuming that it
/// inherits from
/// <c>Microsoft.CSharp.RuntimeBinder.ICSharpInvokeOrInvokeMemberBinder</c>
/// in .NET Framework or
/// <c>Microsoft.CSharp.RuntimeBinder.CSharpInvokeMemberBinder</c>
/// under Mono.</summary>
/// <param name="binder">Binder from which get type arguments.</param>
/// <remarks>This is generally a bad solution, but there is no other
/// currently so we have to go with it.</remarks>
/// <returns>List of types passed as generic parameters.</returns>
public static IList<Type> GetGenericTypeArguments(this InvokeMemberBinder binder)
{
// First try to use delegate if exist
if (_frameworkTypeArgumentsGetter != null)
return _frameworkTypeArgumentsGetter(binder);
if (_isMono)
{
// HACK: Using Reflection
// In mono this is trivial.
// First we get field info.
var field = binder.GetType().GetField("typeArguments", BindingFlags.Instance |
BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
// If this was a success get and return it's value
if (field != null)
return field.GetValue(binder) as IList<Type>;
}
else
{
// HACK: Using Reflection
// In this case, we need more aerobic :D
// First, get the interface
var inter = binder.GetType().GetInterface("Microsoft.CSharp.RuntimeBinder.ICSharpInvokeOrInvokeMemberBinder");
if (inter != null)
{
// Now get property.
var prop = inter.GetProperty("TypeArguments");
// If we have a property, return it's value
if (prop != null)
return prop.GetValue(binder, null) as IList<Type>;
}
}
// Sadly return null if failed.
return null;
}
#endregion GetGenericTypeArguments
}
/// <summary>Extends <see cref="IDisposable"/> interface.</summary>
public interface IExtendedDisposable : IDisposable
{
/// <summary>
/// Gets a value indicating whether this instance is disposed.
/// </summary>
/// <value>
/// <c>true</c> if this instance is disposed; otherwise, <c>false</c>.
/// </value>
bool IsDisposed { get; }
}
/// <summary>Class containing useful string extensions.</summary>
internal static class StringExtensions
{
static StringExtensions()
{
InvalidMultipartMemberChars = _InvalidMultipartMemberChars.ToCharArray();
InvalidMemberChars = _InvalidMemberChars.ToCharArray();
}
private static readonly string _InvalidMultipartMemberChars = " +-*/^%[]{}()!\"\\&=?¿";
private static readonly string _InvalidMemberChars = "." + _InvalidMultipartMemberChars;
/// <summary>
/// Gets an array with some invalid characters that cannot be used with multipart names for class members.
/// </summary>
public static char[] InvalidMultipartMemberChars { get; private set; }
/// <summary>
/// Gets an array with some invalid characters that cannot be used with names for class members.
/// </summary>
public static char[] InvalidMemberChars { get; private set; }
/// <summary>
/// Provides with an alternate and generic way to obtain an alternate string representation for this instance,
/// applying the following rules:
/// <para>- Null values are returned as with the <paramref name="nullString"/> value, or a null object.</para>
/// <para>- Enum values are translated into their string representation.</para>
/// <para>- If the type has override the 'ToString' method then it is used.</para>
/// <para>- If it is a dictionary, then a collection of key/value pairs where the value part is also translated.</para>
/// <para>- If it is a collection, then a collection of value items also translated.</para>
/// <para>- If it has public public properties (or if not, if it has public fields), the collection of name/value
/// pairs, with the values translated.</para>
/// <para>- Finally it falls back to the standard 'type.FullName' mechanism.</para>
/// </summary>
/// <param name="obj">The object to obtain its alternate string representation from.</param>
/// <param name="brackets">The brackets to use if needed. If not null it must be at least a 2-chars' array containing
/// the opening and closing brackets.</param>
/// <param name="nullString">Representation of null string..</param>
/// <returns>The alternate string representation of this object.</returns>
public static string Sketch(this object obj, char[] brackets = null, string nullString = "(null)")
{
if (obj == null) return nullString;
if (obj is string) return (string)obj;
Type type = obj.GetType();
if (type.IsEnum) return obj.ToString();
// If the ToString() method has been overriden (by the type itself, or by its parents), let's use it...
MethodInfo method = type.GetMethod("ToString", Type.EmptyTypes);
if (method.DeclaringType != typeof(object)) return obj.ToString();
// For alll other cases...
StringBuilder sb = new StringBuilder();
bool first = true;
// Dictionaries...
if (obj is IDictionary)
{
if (brackets == null || brackets.Length < 2)
brackets = "[]".ToCharArray();
sb.AppendFormat("{0}", brackets[0]); first = true; foreach (DictionaryEntry kvp in (IDictionary)obj)
{
if (!first) sb.Append(", "); else first = false;
sb.AppendFormat("'{0}'='{1}'", kvp.Key.Sketch(), kvp.Value.Sketch());
}
sb.AppendFormat("{0}", brackets[1]);
return sb.ToString();
}
// IEnumerables...
IEnumerator ator = null;
if (obj is IEnumerable)
ator = ((IEnumerable)obj).GetEnumerator();
else
{
method = type.GetMethod("GetEnumerator", Type.EmptyTypes);
if (method != null)
ator = (IEnumerator)method.Invoke(obj, null);
}
if (ator != null)
{
if (brackets == null || brackets.Length < 2) brackets = "[]".ToCharArray();
sb.AppendFormat("{0}", brackets[0]); first = true; while (ator.MoveNext())
{
if (!first) sb.Append(", "); else first = false;
sb.AppendFormat("{0}", ator.Current.Sketch());
}
sb.AppendFormat("{0}", brackets[1]);
if (ator is IDisposable)
((IDisposable)ator).Dispose();
return sb.ToString();
}
// As a last resort, using the public properties (or fields if needed, or type name)...
BindingFlags flags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.FlattenHierarchy;
PropertyInfo[] props = type.GetProperties(flags);
FieldInfo[] infos = type.GetFields(flags);
if (props.Length == 0 && infos.Length == 0) sb.Append(type.FullName); // Fallback if needed
else
{
if (brackets == null || brackets.Length < 2) brackets = "{}".ToCharArray();
sb.AppendFormat("{0}", brackets[0]);
first = true;
if (props.Length != 0)
{
foreach (var prop in props)
{
if (!first) sb.Append(", "); else first = false;
sb.AppendFormat("{0}='{1}'", prop.Name, prop.GetValue(obj, null).Sketch());
}
}
else
{
if (infos.Length != 0)
{
foreach (var info in infos)
{
if (!first) sb.Append(", "); else first = false;
sb.AppendFormat("{0}='{1}'", info.Name, info.GetValue(obj).Sketch());
}
}
}
sb.AppendFormat("{0}", brackets[1]);
}
// And returning...
return sb.ToString();
}
/// <summary>
/// Returns true if the target string contains any of the characters given.
/// </summary>
/// <param name="source">The target string. It cannot be null.</param>
/// <param name="items">An array containing the characters to test. It cannot be null. If empty false is returned.</param>
/// <returns>True if the target string contains any of the characters given, false otherwise.</returns>
public static bool ContainsAny(this string source, char[] items)
{
if (source == null) throw new ArgumentNullException("source", "Source string cannot be null.");
if (items == null) throw new ArgumentNullException("items", "Array of characters to test cannot be null.");
if (items.Length == 0) return false; // No characters to validate
int ix = source.IndexOfAny(items);
return ix >= 0 ? true : false;
}
/// <summary>
/// Returns a new validated string using the rules given.
/// </summary>
/// <param name="source">The source string.</param>
/// <param name="desc">A description of the source string to build errors and exceptions if needed.</param>
/// <param name="canbeNull">True if the returned string can be null.</param>
/// <param name="canbeEmpty">True if the returned string can be empty.</param>
/// <param name="trim">True to trim the returned string.</param>
/// <param name="trimStart">True to left-trim the returned string.</param>
/// <param name="trimEnd">True to right-trim the returned string.</param>
/// <param name="minLen">If >= 0, the min valid length for the returned string.</param>
/// <param name="maxLen">If >= 0, the max valid length for the returned string.</param>
/// <param name="padLeft">If not '\0', the character to use to left-pad the returned string if needed.</param>
/// <param name="padRight">If not '\0', the character to use to right-pad the returned string if needed.</param>
/// <param name="invalidChars">If not null, an array containing invalid chars that must not appear in the returned
/// string.</param>
/// <param name="validChars">If not null, an array containing the only characters that are considered valid for the
/// returned string.</param>
/// <returns>A new validated string.</returns>
public static string Validated(this string source, string desc = null,
bool canbeNull = false, bool canbeEmpty = false,
bool trim = true, bool trimStart = false, bool trimEnd = false,
int minLen = -1, int maxLen = -1, char padLeft = '\0', char padRight = '\0',
char[] invalidChars = null, char[] validChars = null)
{
// Assuring a valid descriptor...
if (string.IsNullOrWhiteSpace(desc)) desc = "Source";
// Validating if null sources are accepted...
if (source == null)
{
if (!canbeNull) throw new ArgumentNullException(desc, string.Format("{0} cannot be null.", desc));
return null;
}
// Trimming if needed...
if (trim && !(trimStart || trimEnd)) source = source.Trim();
else
{
if (trimStart) source = source.TrimStart(' ');
if (trimEnd) source = source.TrimEnd(' ');
}
// Adjusting lenght...
if (minLen > 0)
{
if (padLeft != '\0') source = source.PadLeft(minLen, padLeft);
if (padRight != '\0') source = source.PadRight(minLen, padRight);
}
if (maxLen > 0)
{
if (padLeft != '\0') source = source.PadLeft(maxLen, padLeft);
if (padRight != '\0') source = source.PadRight(maxLen, padRight);
}
// Validating emptyness and lenghts...
if (source.Length == 0)
{
if (!canbeEmpty) throw new ArgumentException(string.Format("{0} cannot be empty.", desc));
return string.Empty;
}
if (minLen >= 0 && source.Length < minLen) throw new ArgumentException(string.Format("Lenght of {0} '{1}' is lower than '{2}'.", desc, source, minLen));
if (maxLen >= 0 && source.Length > maxLen) throw new ArgumentException(string.Format("Lenght of {0} '{1}' is bigger than '{2}'.", desc, source, maxLen));
// Checking invalid chars...
if (invalidChars != null)
{
int n = source.IndexOfAny(invalidChars);
if (n >= 0) throw new ArgumentException(string.Format("Invalid character '{0}' found in {1} '{2}'.", source[n], desc, source));
}
// Checking valid chars...
if (validChars != null)
{
int n = validChars.ToString().IndexOfAny(source.ToCharArray());
if (n >= 0) throw new ArgumentException(string.Format("Invalid character '{0}' found in {1} '{2}'.", validChars.ToString()[n], desc, source));
}
return source;
}
/// <summary>
/// Splits the given string with the 'something AS alias' format, returning a tuple containing its 'something' and 'alias' parts.
/// If no alias is detected, then its component in the tuple returned is null and all the contents from the source
/// string are considered as the 'something' part.
/// </summary>
/// <param name="source">The source string.</param>
/// <returns>A tuple containing the 'something' and 'alias' parts.</returns>
public static Tuple<string, string> SplitSomethingAndAlias(this string source)
{
source = source.Validated("[Something AS Alias]");
string something = null;
string alias = null;
int n = source.LastIndexOf(" AS ", StringComparison.OrdinalIgnoreCase);
if (n < 0)
something = source;
else
{
something = source.Substring(0, n);
alias = source.Substring(n + 4);
}
return new Tuple<string, string>(something, alias);
}
/// <summary>Allows to replace parameters inside of string.</summary>
/// <param name="stringToFill">String containing parameters in format <c>[$ParameterName]</c>.</param>
/// <param name="getValue">Function that should return value that will be placed in string in place of placed parameter.</param>
/// <param name="prefix">Prefix of the parameter. This value can't be null or empty, default value <code>[$</code>.</param>
/// <param name="sufix">Suffix of the parameter. This value can't be null or empty, default value <code>]</code>.</param>
/// <returns>Parsed string.</returns>
public static string FillStringWithVariables(this string stringToFill, Func<string, string> getValue, string prefix = "[$", string sufix = "]")
{
int startPos = 0, endPos = 0;
prefix.Validated();
sufix.Validated();
startPos = stringToFill.IndexOf(prefix, startPos);
while (startPos >= 0)
{
endPos = stringToFill.IndexOf(sufix, startPos + prefix.Length);
int nextStartPos = stringToFill.IndexOf(prefix, startPos + prefix.Length);
if (endPos > startPos + prefix.Length + 1 && (nextStartPos > endPos || nextStartPos == -1))
{
string paramName = stringToFill.Substring(startPos + prefix.Length, endPos - (startPos + prefix.Length));
stringToFill = stringToFill
.Remove(startPos, (endPos - startPos) + sufix.Length)
.Insert(startPos, getValue(paramName));
}
startPos = stringToFill.IndexOf(prefix, startPos + prefix.Length);
}
return stringToFill;
}
}
/// <summary>Class contains unclassified extensions.</summary>
internal static class UnclassifiedExtensions
{
/// <summary>Easy way to use conditional value.</summary>
/// <remarks>Includes <see cref="DBNull.Value"/>.</remarks>
/// <typeparam name="T">Input object type to check.</typeparam>
/// <typeparam name="R">Result type.</typeparam>
/// <param name="obj">The object to check.</param>
/// <param name="func">The select function.</param>
/// <param name="elseValue">The else value.</param>
/// <returns>Selected value or default value.</returns>
/// <example>It lets you do this:
/// <code>var lname = thingy.NullOr(t => t.Name).NullOr(n => n.ToLower());</code>
/// which is more fluent and (IMO) easier to read than this:
/// <code>var lname = (thingy != null ? thingy.Name : null) != null ? thingy.Name.ToLower() : null;</code>
/// </example>
public static R NullOr<T, R>(this T obj, Func<T, R> func, R elseValue = default(R)) where T : class
{
return obj != null && obj != DBNull.Value ?
func(obj) : elseValue;
}
/// <summary>Easy way to use conditional value.</summary>
/// <remarks>Includes <see cref="DBNull.Value"/>.</remarks>
/// <typeparam name="T">Input object type to check.</typeparam>
/// <typeparam name="R">Result type.</typeparam>
/// <param name="obj">The object to check.</param>
/// <param name="func">The select function.</param>
/// <param name="elseFunc">The else value function.</param>
/// <returns>Selected value or default value.</returns>
/// <example>It lets you do this:
/// <code>var lname = thingy.NullOr(t => t.Name).NullOr(n => n.ToLower());</code>
/// which is more fluent and (IMO) easier to read than this:
/// <code>var lname = (thingy != null ? thingy.Name : null) != null ? thingy.Name.ToLower() : null;</code>
/// </example>
public static R NullOrFn<T, R>(this T obj, Func<T, R> func, Func<R> elseFunc = null) where T : class
{
// Old if to avoid recurency.
return obj != null && obj != DBNull.Value ?
func(obj) : elseFunc != null ? elseFunc() : default(R);
}
}
namespace Dynamics
{
/// <summary>
/// Class able to parse dynamic lambda expressions. Allows to create dynamic logic.
/// </summary>
public class DynamicParser : IExtendedDisposable
{
#region Node
/// <summary>
/// Generic bindable operation where some of its operands is a dynamic argument, or a dynamic member or
/// a method of that argument.
/// </summary>
[Serializable]
public class Node : IDynamicMetaObjectProvider, IExtendedDisposable, ISerializable
{
#region MetaNode
/// <summary>
/// Represents the dynamic binding and a binding logic of
/// an object participating in the dynamic binding.
/// </summary>
internal class MetaNode : DynamicMetaObject
{
/// <summary>
/// Initializes a new instance of the <see cref="MetaNode"/> class.
/// </summary>
/// <param name="parameter">The parameter.</param>
/// <param name="rest">The restrictions.</param>
/// <param name="value">The value.</param>
public MetaNode(Expression parameter, BindingRestrictions rest, object value)
: base(parameter, rest, value)
{
}
private DynamicMetaObject GetBinder(Func<Node, Node> newNodeFunc)
{
var o = (Node)this.Value;
var node = newNodeFunc(o);
o.Parser.Last = node;
var p = Expression.Variable(typeof(Node), "ret");
var exp = Expression.Block(new ParameterExpression[] { p }, Expression.Assign(p, Expression.Constant(node)));
return new MetaNode(exp, this.Restrictions, node);
}
/// <summary>
/// Performs the binding of the dynamic get member operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="T:System.Dynamic.GetMemberBinder" /> that represents the details of the dynamic operation.</param>
/// <returns>
/// The new <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the result of the binding.
/// </returns>
public override DynamicMetaObject BindGetMember(GetMemberBinder binder)
{
return GetBinder(x => new GetMember(x, binder.Name) { Parser = x.Parser });
}
/// <summary>
/// Performs the binding of the dynamic set member operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="T:System.Dynamic.SetMemberBinder" /> that represents the details of the dynamic operation.</param>
/// <param name="value">The <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the value for the set member operation.</param>
/// <returns>
/// The new <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the result of the binding.
/// </returns>
public override DynamicMetaObject BindSetMember(SetMemberBinder binder, DynamicMetaObject value)
{
return GetBinder(x => new SetMember(x, binder.Name, value.Value) { Parser = x.Parser });
}
/// <summary>
/// Performs the binding of the dynamic get index operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="T:System.Dynamic.GetIndexBinder" /> that represents the details of the dynamic operation.</param>
/// <param name="indexes">An array of <see cref="T:System.Dynamic.DynamicMetaObject" /> instances - indexes for the get index operation.</param>
/// <returns>
/// The new <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the result of the binding.
/// </returns>
public override DynamicMetaObject BindGetIndex(GetIndexBinder binder, DynamicMetaObject[] indexes)
{
return GetBinder(x => new GetIndex(x, indexes.Select(m => m.Value).ToArray()) { Parser = x.Parser });
}
/// <summary>
/// Performs the binding of the dynamic set index operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="T:System.Dynamic.SetIndexBinder" /> that represents the details of the dynamic operation.</param>
/// <param name="indexes">An array of <see cref="T:System.Dynamic.DynamicMetaObject" /> instances - indexes for the set index operation.</param>
/// <param name="value">The <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the value for the set index operation.</param>
/// <returns>
/// The new <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the result of the binding.
/// </returns>
public override DynamicMetaObject BindSetIndex(SetIndexBinder binder, DynamicMetaObject[] indexes, DynamicMetaObject value)
{
return GetBinder(x => new SetIndex(x, indexes.Select(m => m.Value).ToArray(), value.Value) { Parser = x.Parser });
}
/// <summary>
/// Performs the binding of the dynamic invoke operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="T:System.Dynamic.InvokeBinder" /> that represents the details of the dynamic operation.</param>
/// <param name="args">An array of <see cref="T:System.Dynamic.DynamicMetaObject" /> instances - arguments to the invoke operation.</param>
/// <returns>
/// The new <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the result of the binding.
/// </returns>
public override DynamicMetaObject BindInvoke(InvokeBinder binder, DynamicMetaObject[] args)
{
return GetBinder(x => new Invoke(x, args.Select(m => m.Value).ToArray()) { Parser = x.Parser });
}
/// <summary>
/// Performs the binding of the dynamic invoke member operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="T:System.Dynamic.InvokeMemberBinder" /> that represents the details of the dynamic operation.</param>
/// <param name="args">An array of <see cref="T:System.Dynamic.DynamicMetaObject" /> instances - arguments to the invoke member operation.</param>
/// <returns>
/// The new <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the result of the binding.
/// </returns>
public override DynamicMetaObject BindInvokeMember(InvokeMemberBinder binder, DynamicMetaObject[] args)
{
return GetBinder(x => new Method(x, binder.Name, args.Select(m => m.Value).ToArray()) { Parser = x.Parser });
}
/// <summary>
/// Performs the binding of the dynamic binary operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="T:System.Dynamic.BinaryOperationBinder" /> that represents the details of the dynamic operation.</param>
/// <param name="arg">An instance of the <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the right hand side of the binary operation.</param>
/// <returns>
/// The new <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the result of the binding.
/// </returns>
public override DynamicMetaObject BindBinaryOperation(BinaryOperationBinder binder, DynamicMetaObject arg)
{
return GetBinder(x => new Binary(x, binder.Operation, arg.Value) { Parser = x.Parser });
}
/// <summary>
/// Performs the binding of the dynamic unary operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="T:System.Dynamic.UnaryOperationBinder" /> that represents the details of the dynamic operation.</param>
/// <returns>
/// The new <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the result of the binding.
/// </returns>
public override DynamicMetaObject BindUnaryOperation(UnaryOperationBinder binder)
{
var o = (Node)this.Value;
var node = new Unary(o, binder.Operation) { Parser = o.Parser };
o.Parser.Last = node;
// If operation is 'IsTrue' or 'IsFalse', we will return false to keep the engine working...
object ret = node;
if (binder.Operation == ExpressionType.IsTrue) ret = (object)false;
if (binder.Operation == ExpressionType.IsFalse) ret = (object)false;
var p = Expression.Variable(ret.GetType(), "ret"); // the type is now obtained from "ret"
var exp = Expression.Block(
new ParameterExpression[] { p },
Expression.Assign(p, Expression.Constant(ret))); // the expression is now obtained from "ret"
return new MetaNode(exp, this.Restrictions, node);
}
/// <summary>
/// Performs the binding of the dynamic conversion operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="T:System.Dynamic.ConvertBinder" /> that represents the details of the dynamic operation.</param>
/// <returns>
/// The new <see cref="T:System.Dynamic.DynamicMetaObject" /> representing the result of the binding.
/// </returns>
public override DynamicMetaObject BindConvert(ConvertBinder binder)
{
var o = (Node)this.Value;
var node = new Convert(o, binder.ReturnType) { Parser = o.Parser };
o.Parser.Last = node;
// Reducing the object to return if this is an assignment node...
object ret = o;
bool done = false;
while (!done)
{
if (ret is SetMember)
ret = ((SetMember)o).Value;
else if (ret is SetIndex)
ret = ((SetIndex)o).Value;
else
done = true;
}
// Creating an instance...
if (binder.ReturnType == typeof(string)) ret = ret.ToString();
else
{
try
{
if (binder.ReturnType.IsNullableType())
ret = null; // to avoid cast exceptions
else
ret = Activator.CreateInstance(binder.ReturnType, true); // true to allow non-public ctor as well
}
catch
{
// as the last resort scenario
ret = new object();
}
}
var p = Expression.Variable(binder.ReturnType, "ret");
var exp = Expression.Block(
new ParameterExpression[] { p },
Expression.Assign(p, Expression.Constant(ret, binder.ReturnType))); // specifying binder.ReturnType
return new MetaNode(exp, this.Restrictions, node);
}
}
#endregion MetaNode
#region Argument
/// <summary>
/// Describe a dynamic argument used in a dynamic lambda expression.
/// </summary>
[Serializable]
public class Argument : Node, ISerializable
{
/// <summary>
/// Initializes a new instance of the <see cref="Argument"/> class.
/// </summary>
/// <param name="name">The name.</param>
public Argument(string name)
: base(name)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="Argument"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected Argument(SerializationInfo info, StreamingContext context)
: base(info, context)
{
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Node::Argument::Disposed}";
return Name;
}
}
#endregion Argument
#region GetMember
/// <summary>
/// Describe a 'get member' operation, as in 'x => x.Member'.
/// </summary>
[Serializable]
public class GetMember : Node, ISerializable
{
/// <summary>
/// Initializes a new instance of the <see cref="GetMember"/> class.
/// </summary>
/// <param name="host">The host.</param>
/// <param name="name">The name.</param>
public GetMember(Node host, string name)
: base(host, name)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="GetMember"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected GetMember(SerializationInfo info, StreamingContext context)
: base(info, context)
{
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Node::GetMember::Disposed}";
return string.Format("{0}.{1}", Host.Sketch(), Name.Sketch());
}
}
#endregion GetMember
#region SetMember
/// <summary>
/// Describe a 'set member' operation, as in 'x => x.Member = y'.
/// </summary>
[Serializable]
public class SetMember : Node, ISerializable
{
/// <summary>
/// Gets the value that has been (virtually) assigned to this member. It might be null if the null value has been
/// assigned to this instance, or if this instance is disposed.
/// </summary>
public object Value { get; private set; }
/// <summary>
/// Initializes a new instance of the <see cref="SetMember"/> class.
/// </summary>
/// <param name="host">The host.</param>
/// <param name="name">The name.</param>
/// <param name="value">The value.</param>
public SetMember(Node host, string name, object value)
: base(host, name)
{
Value = value;
}
/// <summary>
/// Initializes a new instance of the <see cref="SetMember"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected SetMember(SerializationInfo info, StreamingContext context)
: base(info, context)
{
string type = info.GetString("MemberType");
Value = type == "NULL" ? null : info.GetValue("MemberValue", Type.GetType(type));
}
/// <summary>
/// Gets the object data.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
info.AddValue("MemberType", Value == null ? "NULL" : Value.GetType().AssemblyQualifiedName);
if (Value != null)
info.AddValue("MemberValue", Value);
base.GetObjectData(info, context);
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Node::SetMember::Disposed}";
return string.Format("({0}.{1} = {2})", Host.Sketch(), Name.Sketch(), Value.Sketch());
}
}
#endregion SetMember
#region GetIndex
/// <summary>
/// Describe a 'get indexed' operation, as in 'x => x.Member[...]'.
/// </summary>
[Serializable]
public class GetIndex : Node, ISerializable
{
/// <summary>Gets the indexes.</summary>
public object[] Indexes { get; internal set; }
/// <summary>
/// Initializes a new instance of the <see cref="GetIndex"/> class.
/// </summary>
/// <param name="host">The host.</param>
/// <param name="indexes">The indexes.</param>
/// <exception cref="System.ArgumentNullException">Indexes array cannot be null.</exception>
/// <exception cref="System.ArgumentException">Indexes array cannot be empty.</exception>
public GetIndex(Node host, object[] indexes)
: base(host)
{
if (indexes == null)
throw new ArgumentNullException("indexes", "Indexes array cannot be null.");
if (indexes.Length == 0)
throw new ArgumentException("Indexes array cannot be empty.");
Indexes = indexes;
}
/// <summary>
/// Initializes a new instance of the <see cref="GetIndex"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected GetIndex(SerializationInfo info, StreamingContext context)
: base(info, context)
{
int count = (int)info.GetValue("IndexCount", typeof(int));
if (count != 0)
{
Indexes = new object[count]; for (int i = 0; i < count; i++)
{
string typeName = info.GetString("IndexType" + i);
object obj = typeName == "NULL" ? null : info.GetValue("IndexValue" + i, Type.GetType(typeName));
Indexes[i] = obj;
}
}
}
/// <summary>
/// Gets the object data.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
int count = Indexes == null ? 0 : Indexes.Length; info.AddValue("IndexCount", count);
for (int i = 0; i < count; i++)
{
info.AddValue("IndexType" + i, Indexes[i] == null ? "NULL" : Indexes[i].GetType().AssemblyQualifiedName);
if (Indexes[i] != null) info.AddValue("IndexValue" + i, Indexes[i]);
}
base.GetObjectData(info, context);
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Node::GetIndex::Disposed}";
return string.Format("{0}{1}", Host.Sketch(), Indexes == null ? "[empty]" : Indexes.Sketch());
}
}
#endregion GetIndex
#region SetIndex
/// <summary>
/// Describe a 'set indexed' operation, as in 'x => x.Member[...] = Value'.
/// </summary>
[Serializable]
public class SetIndex : GetIndex, ISerializable
{
/// <summary>
/// Gets the value that has been (virtually) assigned to this member. It might be null if the null value has been
/// assigned to this instance, or if this instance is disposed.
/// </summary>
public object Value { get; private set; }
/// <summary>
/// Initializes a new instance of the <see cref="SetIndex"/> class.
/// </summary>
/// <param name="host">The host.</param>
/// <param name="indexes">The indexes.</param>
/// <param name="value">The value.</param>
public SetIndex(Node host, object[] indexes, object value)
: base(host, indexes)
{
Value = value;
}
/// <summary>
/// Initializes a new instance of the <see cref="SetIndex"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected SetIndex(SerializationInfo info, StreamingContext context)
: base(info, context)
{
string type = info.GetString("MemberType");
Value = type == "NULL" ? null : info.GetValue("MemberValue", Type.GetType(type));
}
/// <summary>
/// Gets the object data.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
info.AddValue("MemberType", Value == null ? "NULL" : Value.GetType().AssemblyQualifiedName);
if (Value != null) info.AddValue("MemberValue", Value);
base.GetObjectData(info, context);
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Node::SetIndex::Disposed}";
return string.Format("({0}{1} = {2})", Host.Sketch(), Indexes == null ? "[empty]" : Indexes.Sketch(), Value.Sketch());
}
}
#endregion SetIndex
#region Invoke
/// <summary>
/// Describe a method invocation operation, as in 'x => x.Method(...)".
/// </summary>
[Serializable]
public class Invoke : Node, ISerializable
{
/// <summary>Gets the arguments.</summary>
public object[] Arguments { get; internal set; }
/// <summary>
/// Initializes a new instance of the <see cref="Invoke"/> class.
/// </summary>
/// <param name="host">The host.</param>
/// <param name="arguments">The arguments.</param>
public Invoke(Node host, object[] arguments)
: base(host)
{
Arguments = arguments == null || arguments.Length == 0 ? null : arguments;
}
/// <summary>
/// Initializes a new instance of the <see cref="Invoke"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected Invoke(SerializationInfo info, StreamingContext context)
: base(info, context)
{
int count = (int)info.GetValue("ArgumentCount", typeof(int));
if (count != 0)
{
Arguments = new object[count]; for (int i = 0; i < count; i++)
{
string typeName = info.GetString("ArgumentType" + i);
object obj = typeName == "NULL" ? null : info.GetValue("ArgumentValue" + i, Type.GetType(typeName));
Arguments[i] = obj;
}
}
}
/// <summary>
/// Gets the object data.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
int count = Arguments == null ? 0 : Arguments.Length; info.AddValue("ArgumentCount", count);
for (int i = 0; i < count; i++)
{
info.AddValue("ArgumentType" + i, Arguments[i] == null ? "NULL" : Arguments[i].GetType().AssemblyQualifiedName);
if (Arguments[i] != null) info.AddValue("ArgumentValue" + i, Arguments[i]);
}
base.GetObjectData(info, context);
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Node::Invoke::Disposed}";
return string.Format("{0}{1}", Host.Sketch(), Arguments == null ? "()" : Arguments.Sketch(brackets: "()".ToCharArray()));
}
}
#endregion Invoke
#region Method
/// <summary>
/// Describe a method invocation operation, as in 'x => x.Method(...)".
/// </summary>
[Serializable]
public class Method : Node, ISerializable
{
/// <summary>Gets the arguments.</summary>
public object[] Arguments { get; internal set; }
/// <summary>
/// Initializes a new instance of the <see cref="Method"/> class.
/// </summary>
/// <param name="host">The host.</param>
/// <param name="name">The name.</param>
/// <param name="arguments">The arguments.</param>
public Method(Node host, string name, object[] arguments)
: base(host, name)
{
Arguments = arguments == null || arguments.Length == 0 ? null : arguments;
}
/// <summary>
/// Initializes a new instance of the <see cref="Method"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected Method(SerializationInfo info, StreamingContext context)
: base(info, context)
{
int count = (int)info.GetValue("ArgumentCount", typeof(int));
if (count != 0)
{
Arguments = new object[count]; for (int i = 0; i < count; i++)
{
string typeName = info.GetString("ArgumentType" + i);
object obj = typeName == "NULL" ? null : info.GetValue("ArgumentValue" + i, Type.GetType(typeName));
Arguments[i] = obj;
}
}
}
/// <summary>
/// Gets the object data.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
int count = Arguments == null ? 0 : Arguments.Length; info.AddValue("ArgumentCount", count);
for (int i = 0; i < count; i++)
{
info.AddValue("ArgumentType" + i, Arguments[i] == null ? "NULL" : Arguments[i].GetType().AssemblyQualifiedName);
if (Arguments[i] != null) info.AddValue("ArgumentValue" + i, Arguments[i]);
}
base.GetObjectData(info, context);
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Node::Method::Disposed}";
return string.Format("{0}.{1}{2}", Host.Sketch(), Name.Sketch(), Arguments == null ? "()" : Arguments.Sketch(brackets: "()".ToCharArray()));
}
}
#endregion Method
#region Binary
/// <summary>
/// Represents a binary operation between a dynamic element and an arbitrary object, including null ones, as in
/// 'x =&gt; (x &amp;&amp; null)'. The left operand must be an instance of <see cref="Node"/>, whereas the right one
/// can be any object, including null values.
/// </summary>
[Serializable]
public class Binary : Node, ISerializable
{
/// <summary>Gets the operation.</summary>
public ExpressionType Operation { get; private set; }
/// <summary>Gets host of the <see cref="Node"/>.</summary>
public Node Left { get { return Host; } }
/// <summary>Gets the right side value.</summary>
public object Right { get; private set; }
/// <summary>
/// Initializes a new instance of the <see cref="Binary"/> class.
/// </summary>
/// <param name="left">The left.</param>
/// <param name="operation">The operation.</param>
/// <param name="right">The right.</param>
public Binary(Node left, ExpressionType operation, object right)
: base(left)
{
Operation = operation;
Right = right;
}
/// <summary>
/// Initializes a new instance of the <see cref="Binary"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected Binary(SerializationInfo info, StreamingContext context)
: base(info, context)
{
Operation = (ExpressionType)info.GetValue("Operation", typeof(ExpressionType));
string type = info.GetString("RightType");
Right = type == "NULL" ? null : (Node)info.GetValue("RightItem", Type.GetType(type));
}
/// <summary>
/// Gets the object data.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
info.AddValue("Operation", Operation);
info.AddValue("RightType", Right == null ? "NULL" : Right.GetType().AssemblyQualifiedName);
if (Right != null)
info.AddValue("RightItem", Right);
base.GetObjectData(info, context);
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Node::Binary::Disposed}";
return string.Format("({0} {1} {2})", Host.Sketch(), Operation, Right.Sketch());
}
}
#endregion Binary
#region Unary
/// <summary>
/// Represents an unary operation, as in 'x => !x'. The target must be a <see cref="Node"/> instance. There
/// is no distinction between pre- and post- version of the same operation.
/// </summary>
[Serializable]
public class Unary : Node, ISerializable
{
/// <summary>Gets the operation.</summary>
public ExpressionType Operation { get; private set; }
/// <summary>Gets host of the <see cref="Node"/>.</summary>
public Node Target { get { return Host; } }
/// <summary>
/// Initializes a new instance of the <see cref="Unary"/> class.
/// </summary>
/// <param name="target">The target.</param>
/// <param name="operation">The operation.</param>
public Unary(Node target, ExpressionType operation)
: base(target)
{
Operation = operation;
}
/// <summary>
/// Initializes a new instance of the <see cref="Unary"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected Unary(SerializationInfo info, StreamingContext context)
: base(info, context)
{
Operation = (ExpressionType)info.GetValue("Operation", typeof(ExpressionType));
}
/// <summary>
/// Gets the object data.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
info.AddValue("Operation", Operation);
base.GetObjectData(info, context);
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Node::Binary::Disposed}";
return string.Format("({0} {1})", Operation, Host.Sketch());
}
}
#endregion Unary
#region Convert
/// <summary>
/// Represents a conversion operation, as in 'x => (string)x'.
/// </summary>
[Serializable]
public class Convert : Node, ISerializable
{
/// <summary>Gets the new type to which value will be converted.</summary>
public Type NewType { get; private set; }
/// <summary>Gets host of the <see cref="Node"/>.</summary>
public Node Target { get { return Host; } }
/// <summary>
/// Initializes a new instance of the <see cref="Convert"/> class.
/// </summary>
/// <param name="target">The target.</param>
/// <param name="newType">The new type.</param>
public Convert(Node target, Type newType)
: base(target)
{
NewType = newType;
}
/// <summary>
/// Initializes a new instance of the <see cref="Convert"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected Convert(SerializationInfo info, StreamingContext context)
: base(info, context)
{
NewType = (Type)info.GetValue("NewType", typeof(Type));
}
/// <summary>
/// Gets the object data.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
public override void GetObjectData(SerializationInfo info, StreamingContext context)
{
info.AddValue("NewType", NewType);
base.GetObjectData(info, context);
}
}
#endregion Convert
/// <summary>
/// Gets the name of the member. It might be null if this instance is disposed.
/// </summary>
public string Name { get; internal set; }
/// <summary>Gets host of the <see cref="Node"/>.</summary>
public Node Host { get; internal set; }
/// <summary>Gets reference to the parser.</summary>
public DynamicParser Parser { get; internal set; }
/// <summary>
/// Initializes a new instance of the <see cref="Node"/> class.
/// </summary>
internal Node()
{
IsDisposed = false;
}
/// <summary>
/// Initializes a new instance of the <see cref="Node"/> class.
/// </summary>
/// <param name="host">The host.</param>
internal Node(Node host)
: this()
{
if (host == null)
throw new ArgumentNullException("host", "Host cannot be null.");
Host = host;
}
/// <summary>
/// Initializes a new instance of the <see cref="Node"/> class.
/// </summary>
/// <param name="name">The name.</param>
internal Node(string name)
: this()
{
Name = name.Validated("Name");
}
/// <summary>
/// Initializes a new instance of the <see cref="Node"/> class.
/// </summary>
/// <param name="host">The host.</param>
/// <param name="name">The name.</param>
/// <exception cref="System.ArgumentNullException">Host cannot be null.</exception>
internal Node(Node host, string name)
: this(host)
{
Name = name.Validated("Name");
}
/// <summary>
/// Initializes a new instance of the <see cref="Node"/> class.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="context">The context.</param>
protected Node(SerializationInfo info, StreamingContext context)
{
Name = info.GetString("MemberName");
string type = info.GetString("HostType");
Host = type == "NULL" ? null : (Node)info.GetValue("HostItem", Type.GetType(type));
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Node::Disposed}";
return "{DynamicParser::Node::Empty}";
}
#region Implementation of IDynamicMetaObjectProvider
/// <summary>Returns the <see cref="T:System.Dynamic.DynamicMetaObject" /> responsible
/// for binding operations performed on this object.</summary>
/// <param name="parameter">The expression tree representation of the runtime value.</param>
/// <returns>The <see cref="T:System.Dynamic.DynamicMetaObject" /> to bind this object.</returns>
/// <exception cref="System.ObjectDisposedException">Thrown if this instance is disposed.</exception>
public DynamicMetaObject GetMetaObject(System.Linq.Expressions.Expression parameter)
{
if (IsDisposed)
throw new ObjectDisposedException("DynamicParser.Node");
return new MetaNode(
parameter,
BindingRestrictions.GetInstanceRestriction(parameter, this),
this);
}
#endregion Implementation of IDynamicMetaObjectProvider
#region Implementation of IExtendedDisposable
/// <summary>Gets a value indicating whether this instance is disposed.</summary>
public bool IsDisposed { get; private set; }
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
IsDisposed = true;
}
#endregion Implementation of IExtendedDisposable
#region Implementation of ISerializable
/// <summary>
/// Populates a <see cref="T:System.Runtime.Serialization.SerializationInfo" /> with the data needed to serialize the target object.
/// </summary>
/// <param name="info">The <see cref="T:System.Runtime.Serialization.SerializationInfo" /> to populate with data.</param>
/// <param name="context">The destination (see <see cref="T:System.Runtime.Serialization.StreamingContext" />) for this serialization.</param>
public virtual void GetObjectData(SerializationInfo info, StreamingContext context)
{
if (!string.IsNullOrEmpty(Name))
info.AddValue("MemberName", Name);
info.AddValue("HostType", Host == null ? "NULL" : Host.GetType().AssemblyQualifiedName);
if (Host != null)
info.AddValue("HostItem", Host);
}
#endregion Implementation of ISerializable
}
#endregion Node
#region Data
private List<Node.Argument> _arguments = new List<Node.Argument>();
private object _uncertainResult;
#endregion Data
#region Properties
/// <summary>Gets the last node (root of the tree).</summary>
public Node Last { get; internal set; }
/// <summary>
/// Gets an enumeration containing the dynamic arguments used in the dynamic lambda expression parsed.
/// </summary>
public IEnumerable<Node.Argument> Arguments
{
get
{
List<Node.Argument> list = new List<Node.Argument>();
if (!IsDisposed && _arguments != null)
list.AddRange(_arguments);
foreach (var arg in list)
yield return arg;
list.Clear();
list = null;
}
}
/// <summary>
/// Gets the number of dynamic arguments used in the dynamic lambda expression parsed.
/// </summary>
public int Count
{
get { return _arguments == null ? 0 : _arguments.Count; }
}
/// <summary>
/// Gets the result of the parsing of the dynamic lambda expression. This result can be either an arbitrary object,
/// including null, if the expression resolves to it, or an instance of the <see cref="Node"/> class that
/// contains the last logic expression evaluated when parsing the dynamic lambda expression.
/// </summary>
public object Result
{
get { return _uncertainResult ?? Last; }
}
#endregion Properties
private DynamicParser(Delegate f)
{
foreach (var p in f.Method.GetParameters())
{
if (p.GetCustomAttributes(typeof(DynamicAttribute), true).Any())
this._arguments.Add(new Node.Argument(p.Name) { Parser = this });
else
throw new ArgumentException(string.Format("Argument '{0}' must be dynamic.", p.Name));
}
_uncertainResult = f.DynamicInvoke(_arguments.ToArray());
}
/// <summary>
/// Parses the dynamic lambda expression given in the form of a delegate, and returns a new instance of the
/// <see cref="DynamicParser"/> class that holds the dynamic arguments used in the dynamic lambda expression, and
/// the result of the parsing.
/// </summary>
/// <param name="f">The dynamic lambda expression to parse.</param>
/// <returns>A new instance of <see cref="DynamicParser"/>.</returns>
public static DynamicParser Parse(Delegate f)
{
return new DynamicParser(f);
}
/// <summary>Returns a <see cref="System.String" /> that represents this instance.</summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
if (IsDisposed)
return "{DynamicParser::Disposed}";
StringBuilder sb = new StringBuilder();
sb.Append("(");
bool first = true;
if (_arguments != null)
{
foreach (var arg in _arguments)
{
if (!first) sb.Append(", "); else first = false;
sb.Append(arg);
}
}
sb.Append(")");
sb.AppendFormat(" => {0}", Result.Sketch());
return sb.ToString();
}
#region Implementation of IExtendedDisposable
/// <summary>Gets a value indicating whether this instance is disposed.</summary>
public bool IsDisposed { get; private set; }
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
IsDisposed = true;
}
#endregion Implementation of IExtendedDisposable
}
/// <summary>Class that allows to use interfaces as dynamic objects.</summary>
/// <typeparam name="T">Type of class to proxy.</typeparam>
/// <remarks>This is temporary solution. Which allows to use builders as a dynamic type.</remarks>
public class DynamicProxy<T> : DynamicObject
{
private T _proxy;
private Type _type;
private Dictionary<string, DynamicPropertyInvoker> _properties;
private Dictionary<MethodInfo, Delegate> _methods;
/// <summary>
/// Initializes a new instance of the <see cref="DynamicProxy{T}" /> class.
/// </summary>
/// <param name="proxiedObject">The object to which proxy should be created.</param>
/// <exception cref="System.ArgumentNullException">The object to which proxy should be created is null.</exception>
public DynamicProxy(T proxiedObject)
{
if (proxiedObject == null)
throw new ArgumentNullException("proxiedObject");
_proxy = proxiedObject;
_type = typeof(T);
_properties = _type.GetProperties()
.ToDictionary(
k => k.Name,
v => new DynamicPropertyInvoker(v, null));
_methods = _type.GetMethods()
.Where(m => !m.IsStatic && !m.IsGenericMethod)
.ToDictionary(
k => k,
v =>
{
try
{
return Delegate.CreateDelegate(Expression.GetDelegateType(v.GetParameters().Select(t => t.ParameterType).Concat(new[] { v.ReflectedType }).ToArray()), _proxy, v.Name);
}
catch (ArgumentException)
{
return null;
}
});
}
/// <summary>Provides implementation for type conversion operations.
/// Classes derived from the <see cref="T:System.Dynamic.DynamicObject" />
/// class can override this method to specify dynamic behavior for
/// operations that convert an object from one type to another.</summary>
/// <param name="binder">Provides information about the conversion operation.
/// The binder.Type property provides the type to which the object must be
/// converted. For example, for the statement (String)sampleObject in C#
/// (CType(sampleObject, Type) in Visual Basic), where sampleObject is an
/// instance of the class derived from the <see cref="T:System.Dynamic.DynamicObject" />
/// class, binder.Type returns the <see cref="T:System.String" /> type.
/// The binder.Explicit property provides information about the kind of
/// conversion that occurs. It returns true for explicit conversion and
/// false for implicit conversion.</param>
/// <param name="result">The result of the type conversion operation.</param>
/// <returns>Returns <c>true</c> if the operation is successful; otherwise, <c>false</c>.
/// If this method returns false, the run-time binder of the language determines the
/// behavior. (In most cases, a language-specific run-time exception is thrown).</returns>
public override bool TryConvert(ConvertBinder binder, out object result)
{
if (binder.Type == typeof(T))
{
result = _proxy;
return true;
}
if (_proxy != null &&
binder.Type.IsAssignableFrom(_proxy.GetType()))
{
result = _proxy;
return true;
}
return base.TryConvert(binder, out result);
}
/// <summary>Provides the implementation for operations that get member
/// values. Classes derived from the <see cref="T:System.Dynamic.DynamicObject" />
/// class can override this method to specify dynamic behavior for
/// operations such as getting a value for a property.</summary>
/// <param name="binder">Provides information about the object that
/// called the dynamic operation. The binder.Name property provides
/// the name of the member on which the dynamic operation is performed.
/// For example, for the Console.WriteLine(sampleObject.SampleProperty)
/// statement, where sampleObject is an instance of the class derived
/// from the <see cref="T:System.Dynamic.DynamicObject" /> class,
/// binder.Name returns "SampleProperty". The binder.IgnoreCase property
/// specifies whether the member name is case-sensitive.</param>
/// <param name="result">The result of the get operation. For example,
/// if the method is called for a property, you can assign the property
/// value to <paramref name="result" />.</param>
/// <returns>Returns <c>true</c> if the operation is successful; otherwise,
/// <c>false</c>. If this method returns false, the run-time binder of the
/// language determines the behavior. (In most cases, a run-time exception
/// is thrown).</returns>
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
try
{
var prop = _properties.TryGetValue(binder.Name);
result = prop.NullOr(p => p.Get.NullOr(g => g(_proxy), null), null);
return prop != null && prop.Get != null;
}
catch (Exception ex)
{
throw new InvalidOperationException(string.Format("Cannot get member {0}", binder.Name), ex);
}
}
/// <summary>Provides the implementation for operations that set member
/// values. Classes derived from the <see cref="T:System.Dynamic.DynamicObject" />
/// class can override this method to specify dynamic behavior for operations
/// such as setting a value for a property.</summary>
/// <param name="binder">Provides information about the object that called
/// the dynamic operation. The binder.Name property provides the name of
/// the member to which the value is being assigned. For example, for the
/// statement sampleObject.SampleProperty = "Test", where sampleObject is
/// an instance of the class derived from the <see cref="T:System.Dynamic.DynamicObject" />
/// class, binder.Name returns "SampleProperty". The binder.IgnoreCase
/// property specifies whether the member name is case-sensitive.</param>
/// <param name="value">The value to set to the member. For example, for
/// sampleObject.SampleProperty = "Test", where sampleObject is an instance
/// of the class derived from the <see cref="T:System.Dynamic.DynamicObject" />
/// class, the <paramref name="value" /> is "Test".</param>
/// <returns>Returns <c>true</c> if the operation is successful; otherwise,
/// <c>false</c>. If this method returns false, the run-time binder of the
/// language determines the behavior. (In most cases, a language-specific
/// run-time exception is thrown).</returns>
public override bool TrySetMember(SetMemberBinder binder, object value)
{
try
{
var prop = _properties.TryGetValue(binder.Name);
if (prop != null && prop.Set != null)
{
prop.Set(_proxy, value);
return true;
}
return false;
}
catch (Exception ex)
{
throw new InvalidOperationException(string.Format("Cannot set member {0} to '{1}'", binder.Name, value), ex);
}
}
/// <summary>Provides the implementation for operations that invoke a member.
/// Classes derived from the <see cref="T:System.Dynamic.DynamicObject" />
/// class can override this method to specify dynamic behavior for
/// operations such as calling a method.</summary>
/// <param name="binder">Provides information about the dynamic operation.
/// The binder.Name property provides the name of the member on which the
/// dynamic operation is performed. For example, for the statement
/// sampleObject.SampleMethod(100), where sampleObject is an instance of
/// the class derived from the <see cref="T:System.Dynamic.DynamicObject" />
/// class, binder.Name returns "SampleMethod". The binder.IgnoreCase property
/// specifies whether the member name is case-sensitive.</param>
/// <param name="args">The arguments that are passed to the object member
/// during the invoke operation. For example, for the statement
/// sampleObject.SampleMethod(100), where sampleObject is derived from the
/// <see cref="T:System.Dynamic.DynamicObject" /> class,
/// First element of <paramref name="args" /> is equal to 100.</param>
/// <param name="result">The result of the member invocation.</param>
/// <returns>Returns <c>true</c> if the operation is successful; otherwise,
/// <c>false</c>. If this method returns false, the run-time binder of the
/// language determines the behavior. (In most cases, a language-specific
/// run-time exception is thrown).</returns>
public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
{
return TryInvokeMethod(binder.Name, out result, args) || base.TryInvokeMember(binder, args, out result);
}
private bool TryInvokeMethod(string name, out object result, object[] args)
{
result = null;
MethodInfo mi = _methods.Keys
.Where(m => m.Name == name)
.FirstOrDefault(m =>
CompareTypes(m.GetParameters().ToArray(),
args.Select(a => a.GetType()).ToArray()));
Delegate d = _methods.TryGetValue(mi);
if (d != null)
{
result = d.DynamicInvoke(CompleteArguments(mi.GetParameters().ToArray(), args));
if (d.Method.ReturnType == _type && result is T)
result = new DynamicProxy<T>((T)result);
return true;
}
else if (mi != null)
{
result = mi.Invoke(_proxy, CompleteArguments(mi.GetParameters().ToArray(), args));
if (mi.ReturnType == _type && result is T)
result = new DynamicProxy<T>((T)result);
return true;
}
return false;
}
private bool CompareTypes(ParameterInfo[] parameters, Type[] types)
{
if (parameters.Length < types.Length || parameters.Count(p => !p.IsOptional) > types.Length)
return false;
for (int i = 0; i < types.Length; i++)
if (types[i] != parameters[i].ParameterType && !parameters[i].ParameterType.IsAssignableFrom(types[i]))
return false;
return true;
}
private object[] CompleteArguments(ParameterInfo[] parameters, object[] arguments)
{
return arguments.Concat(parameters.Skip(arguments.Length).Select(p => p.DefaultValue)).ToArray();
}
}
}
}
namespace Mapper
{
/// <summary>Allows to add table name to class.</summary>
[AttributeUsage(AttributeTargets.Property)]
public class ColumnAttribute : Attribute
{
/// <summary>Gets or sets name.</summary>
public string Name { get; set; }
/// <summary>Gets or sets column type.</summary>
/// <remarks>Used when overriding schema.</remarks>
public DbType? Type { get; set; }
/// <summary>Gets or sets a value indicating whether column is a key.</summary>
public bool IsKey { get; set; }
/// <summary>Gets or sets a value indicating whether column should have unique value.</summary>
/// <remarks>Used when overriding schema.</remarks>
public bool? IsUnique { get; set; }
/// <summary>Gets or sets column size.</summary>
/// <remarks>Used when overriding schema.</remarks>
public int? Size { get; set; }
/// <summary>Gets or sets column precision.</summary>
/// <remarks>Used when overriding schema.</remarks>
public byte? Precision { get; set; }
/// <summary>Gets or sets column scale.</summary>
/// <remarks>Used when overriding schema.</remarks>
public byte? Scale { get; set; }
/// <summary>Gets or sets a value indicating whether this kolumn is no allowed to be inserted.</summary>
/// <remarks>This is only a suggesstion to automated mapping.</remarks>
public bool IsNoInsert { get; set; }
/// <summary>Gets or sets a value indicating whether this kolumn is no allowed to be updated.</summary>
/// <remarks>This is only a suggesstion to automated mapping.</remarks>
public bool IsNoUpdate { get; set; }
#region Constructors
/// <summary>Initializes a new instance of the <see cref="ColumnAttribute" /> class.</summary>
public ColumnAttribute()
{
}
/// <summary>Initializes a new instance of the <see cref="ColumnAttribute" /> class.</summary>
/// <param name="name">Name of column.</param>
public ColumnAttribute(string name)
{
Name = name;
}
/// <summary>Initializes a new instance of the <see cref="ColumnAttribute" /> class.</summary>
/// <param name="isKey">Set column as a key column.</param>
public ColumnAttribute(bool isKey)
{
IsKey = isKey;
}
/// <summary>Initializes a new instance of the <see cref="ColumnAttribute" /> class.</summary>
/// <param name="name">Name of column.</param>
/// <param name="isKey">Set column as a key column.</param>
public ColumnAttribute(string name, bool isKey)
: this(name)
{
IsKey = isKey;
}
/// <summary>Initializes a new instance of the <see cref="ColumnAttribute" /> class.</summary>
/// <param name="isKey">Set column as a key column.</param>
/// <param name="type">Set column type.</param>
public ColumnAttribute(bool isKey, DbType type)
: this(isKey)
{
Type = type;
}
/// <summary>Initializes a new instance of the <see cref="ColumnAttribute" /> class.</summary>
/// <param name="name">Name of column.</param>
/// <param name="isKey">Set column as a key column.</param>
/// <param name="type">Set column type.</param>
public ColumnAttribute(string name, bool isKey, DbType type)
: this(name, isKey)
{
Type = type;
}
/// <summary>Initializes a new instance of the <see cref="ColumnAttribute" /> class.</summary>
/// <param name="name">Name of column.</param>
/// <param name="isKey">Set column as a key column.</param>
/// <param name="type">Set column type.</param>
/// <param name="size">Set column value size.</param>
public ColumnAttribute(string name, bool isKey, DbType type, int size)
: this(name, isKey, type)
{
Size = size;
}
/// <summary>Initializes a new instance of the <see cref="ColumnAttribute" /> class.</summary>
/// <param name="name">Name of column.</param>
/// <param name="isKey">Set column as a key column.</param>
/// <param name="type">Set column type.</param>
/// <param name="precision">Set column value precision.</param>
/// <param name="scale">Set column value scale.</param>
public ColumnAttribute(string name, bool isKey, DbType type, byte precision, byte scale)
: this(name, isKey, type)
{
Precision = precision;
Scale = scale;
}
/// <summary>Initializes a new instance of the <see cref="ColumnAttribute" /> class.</summary>
/// <param name="name">Name of column.</param>
/// <param name="isKey">Set column as a key column.</param>
/// <param name="type">Set column type.</param>
/// <param name="size">Set column value size.</param>
/// <param name="precision">Set column value precision.</param>
/// <param name="scale">Set column value scale.</param>
public ColumnAttribute(string name, bool isKey, DbType type, int size, byte precision, byte scale)
: this(name, isKey, type, precision, scale)
{
Size = size;
}
/// <summary>Initializes a new instance of the <see cref="ColumnAttribute" /> class.</summary>
/// <param name="name">Name of column.</param>
/// <param name="isKey">Set column as a key column.</param>
/// <param name="isUnique">Set column has unique value.</param>
/// <param name="type">Set column type.</param>
/// <param name="size">Set column value size.</param>
/// <param name="precision">Set column value precision.</param>
/// <param name="scale">Set column value scale.</param>
public ColumnAttribute(string name, bool isKey, bool isUnique, DbType type, int size, byte precision, byte scale)
: this(name, isKey, type, size, precision, scale)
{
IsUnique = isUnique;
}
#endregion Constructors
}
/// <summary>Class with mapper cache.</summary>
public static class DynamicMapperCache
{
private static readonly object SyncLock = new object();
private static Dictionary<Type, DynamicTypeMap> _cache = new Dictionary<Type, DynamicTypeMap>();
/// <summary>Get type mapper.</summary>
/// <typeparam name="T">Type of mapper.</typeparam>
/// <returns>Type mapper.</returns>
public static DynamicTypeMap GetMapper<T>()
{
return GetMapper(typeof(T));
}
/// <summary>Get type mapper.</summary>
/// <param name="type">Type of mapper.</param>
/// <returns>Type mapper.</returns>
public static DynamicTypeMap GetMapper(Type type)
{
if (type == null)
return null;
/*if (type.IsAnonymous())
return null;*/
DynamicTypeMap mapper = null;
lock (SyncLock)
{
if (!_cache.TryGetValue(type, out mapper))
{
mapper = new DynamicTypeMap(type);
if (mapper != null)
_cache.Add(type, mapper);
}
}
return mapper;
}
}
/// <summary>Dynamic property invoker.</summary>
public class DynamicPropertyInvoker
{
internal class ParameterSpec
{
public string Name { get; set; }
public DbType Type { get; set; }
public int Ordinal { get; set; }
}
/// <summary>Gets the type of property.</summary>
public Type Type { get; private set; }
/// <summary>Gets value getter.</summary>
public Func<object, object> Get { get; private set; }
/// <summary>Gets value setter.</summary>
public Action<object, object> Set { get; private set; }
/// <summary>Gets name of property.</summary>
public string Name { get; private set; }
/// <summary>Gets type column description.</summary>
public ColumnAttribute Column { get; private set; }
/// <summary>Gets a value indicating whether this <see cref="DynamicPropertyInvoker"/> is ignored in some cases.</summary>
public bool Ignore { get; private set; }
/// <summary>Initializes a new instance of the <see cref="DynamicPropertyInvoker" /> class.</summary>
/// <param name="property">Property info to be invoked in the future.</param>
/// <param name="attr">Column attribute if exist.</param>
public DynamicPropertyInvoker(PropertyInfo property, ColumnAttribute attr)
{
Name = property.Name;
Type = property.PropertyType;
var ignore = property.GetCustomAttributes(typeof(IgnoreAttribute), false);
Ignore = ignore != null && ignore.Length > 0;
Column = attr;
if (property.CanRead)
Get = CreateGetter(property);
if (property.CanWrite)
Set = CreateSetter(property);
}
private Func<object, object> CreateGetter(PropertyInfo property)
{
if (!property.CanRead)
return null;
var objParm = Expression.Parameter(typeof(object), "o");
return Expression.Lambda<Func<object, object>>(
Expression.Convert(
Expression.Property(
Expression.TypeAs(objParm, property.DeclaringType),
property.Name),
typeof(object)), objParm).Compile();
}
private Action<object, object> CreateSetter(PropertyInfo property)
{
if (!property.CanWrite)
return null;
var objParm = Expression.Parameter(typeof(object), "o");
var valueParm = Expression.Parameter(typeof(object), "value");
return Expression.Lambda<Action<object, object>>(
Expression.Assign(
Expression.Property(
Expression.Convert(objParm, property.DeclaringType),
property.Name),
Expression.Convert(valueParm, property.PropertyType)),
objParm, valueParm).Compile();
}
#region Type command cache
internal ParameterSpec InsertCommandParameter { get; set; }
internal ParameterSpec UpdateCommandParameter { get; set; }
internal ParameterSpec DeleteCommandParameter { get; set; }
#endregion Type command cache
}
/// <summary>Represents type columnMap.</summary>
public class DynamicTypeMap
{
/// <summary>Gets mapper destination type creator.</summary>
public Type Type { get; private set; }
/// <summary>Gets type table description.</summary>
public TableAttribute Table { get; private set; }
/// <summary>Gets object creator.</summary>
public Func<object> Creator { get; private set; }
/// <summary>Gets map of columns to properties.</summary>
/// <remarks>Key: Column name (lower), Value: <see cref="DynamicPropertyInvoker"/>.</remarks>
public Dictionary<string, DynamicPropertyInvoker> ColumnsMap { get; private set; }
/// <summary>Gets map of properties to column.</summary>
/// <remarks>Key: Property name, Value: Column name.</remarks>
public Dictionary<string, string> PropertyMap { get; private set; }
/// <summary>Gets list of ignored properties.</summary>
public List<string> Ignored { get; private set; }
/// <summary>Initializes a new instance of the <see cref="DynamicTypeMap" /> class.</summary>
/// <param name="type">Type to which columnMap objects.</param>
public DynamicTypeMap(Type type)
{
Type = type;
var attr = type.GetCustomAttributes(typeof(TableAttribute), false);
if (attr != null && attr.Length > 0)
Table = (TableAttribute)attr[0];
Creator = CreateCreator();
CreateColumnAndPropertyMap();
}
private void CreateColumnAndPropertyMap()
{
var columnMap = new Dictionary<string, DynamicPropertyInvoker>();
var propertyMap = new Dictionary<string, string>();
var ignored = new List<string>();
foreach (var pi in Type.GetProperties())
{
ColumnAttribute attr = null;
var attrs = pi.GetCustomAttributes(typeof(ColumnAttribute), true);
if (attrs != null && attrs.Length > 0)
attr = (ColumnAttribute)attrs[0];
string col = attr == null || string.IsNullOrEmpty(attr.Name) ? pi.Name : attr.Name;
var val = new DynamicPropertyInvoker(pi, attr);
columnMap.Add(col.ToLower(), val);
propertyMap.Add(pi.Name, col);
if (val.Ignore)
ignored.Add(pi.Name);
}
ColumnsMap = columnMap;
PropertyMap = propertyMap;
Ignored = ignored; ////columnMap.Where(i => i.Value.Ignore).Select(i => i.Value.Name).ToList();
}
private Func<object> CreateCreator()
{
if (Type.GetConstructor(Type.EmptyTypes) != null)
return Expression.Lambda<Func<object>>(Expression.New(Type)).Compile();
return null;
}
/// <summary>Create object of <see cref="DynamicTypeMap.Type"/> type and fill values from <c>source</c>.</summary>
/// <param name="source">Object containing values that will be mapped to newly created object.</param>
/// <returns>New object of <see cref="DynamicTypeMap.Type"/> type with matching values from <c>source</c>.</returns>
public object Create(object source)
{
return Map(source, Creator());
}
/// <summary>Fill values from <c>source</c> to <see cref="DynamicTypeMap.Type"/> object in <c>destination</c>.</summary>
/// <param name="source">Object containing values that will be mapped to newly created object.</param>
/// <param name="destination">Object of <see cref="DynamicTypeMap.Type"/> type to which copy values from <c>source</c>.</param>
/// <returns>Object of <see cref="DynamicTypeMap.Type"/> type with matching values from <c>source</c>.</returns>
public object Map(object source, object destination)
{
DynamicPropertyInvoker dpi = null;
foreach (var item in source.ToDictionary())
{
if (ColumnsMap.TryGetValue(item.Key.ToLower(), out dpi) && item.Value != null)
if (dpi.Set != null)
dpi.Set(destination, item.Value);
}
return destination;
}
#region Type command cache
internal string InsertCommandText { get; set; }
internal string UpdateCommandText { get; set; }
internal string DeleteCommandText { get; set; }
#endregion Type command cache
}
/// <summary>Allows to add ignore action to property.</summary>
/// <remarks>Property still get's mapped from output.</remarks>
[AttributeUsage(AttributeTargets.Property)]
public class IgnoreAttribute : Attribute
{
}
/// <summary>Allows to add table name to class.</summary>
[AttributeUsage(AttributeTargets.Class)]
public class TableAttribute : Attribute
{
/// <summary>Gets or sets table owner name.</summary>
public string Owner { get; set; }
/// <summary>Gets or sets name.</summary>
public string Name { get; set; }
/// <summary>Gets or sets a value indicating whether override database
/// schema values.</summary>
/// <remarks>If database doesn't support schema, you still have to
/// set this to true to get schema from type.</remarks>
public bool Override { get; set; }
}
}
}
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