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DynamORM/Builders/Implementation/DynamicDeleteQueryBuilder.cs
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DynamORM/Builders/Implementation/DynamicDeleteQueryBuilder.cs
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/*
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* DynamORM - Dynamic Object-Relational Mapping library.
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* Copyright (c) 2012, Grzegorz Russek (grzegorz.russek@gmail.com)
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* All rights reserved.
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*
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* Some of methods in this code file is based on Kerosene ORM solution
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* for parsing dynamic lambda expressions by Moisés Barba Cebeira
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Linq;
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using DynamORM.Builders.Extensions;
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namespace DynamORM.Builders.Implementation
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{
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/// <summary>Implementation of dynamic delete query builder.</summary>
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internal class DynamicDeleteQueryBuilder : DynamicModifyBuilder, IDynamicDeleteQueryBuilder, DynamicQueryBuilder.IQueryWithWhere
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="DynamicDeleteQueryBuilder"/> class.
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/// </summary>
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/// <param name="db">The database.</param>
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internal DynamicDeleteQueryBuilder(DynamicDatabase db)
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: base(db)
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="DynamicDeleteQueryBuilder"/> class.
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/// </summary>
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/// <param name="db">The database.</param>
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/// <param name="tableName">Name of the table.</param>
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public DynamicDeleteQueryBuilder(DynamicDatabase db, string tableName)
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: base(db, tableName)
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{
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}
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/// <summary>Generates the text this command will execute against the underlying database.</summary>
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/// <returns>The text to execute against the underlying database.</returns>
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/// <remarks>This method must be override by derived classes.</remarks>
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public override string CommandText()
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{
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var info = Tables.Single();
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return string.Format("DELETE FROM {0}{1} WHERE {2}",
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string.IsNullOrEmpty(info.Owner) ? string.Empty : string.Format("{0}.", Database.DecorateName(info.Owner)),
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Database.DecorateName(info.Name), WhereCondition);
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}
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#region Where
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/// <summary>
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/// Adds to the 'Where' clause the contents obtained from parsing the dynamic lambda expression given. The condition
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/// is parsed to the appropriate syntax, where the specific customs virtual methods supported by the parser are used
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/// as needed.
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/// <para>- If several Where() methods are chained their contents are, by default, concatenated with an 'AND' operator.</para>
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/// <para>- The 'And()' and 'Or()' virtual method can be used to concatenate with an 'OR' or an 'AND' operator, as in:
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/// 'Where( x => x.Or( condition ) )'.</para>
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/// </summary>
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/// <param name="func">The specification.</param>
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/// <returns>This instance to permit chaining.</returns>
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public virtual IDynamicDeleteQueryBuilder Where(Func<dynamic, object> func)
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{
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return this.InternalWhere(func);
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}
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/// <summary>Add where condition.</summary>
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/// <param name="column">Condition column with operator and value.</param>
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/// <returns>Builder instance.</returns>
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public virtual IDynamicDeleteQueryBuilder Where(DynamicColumn column)
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{
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return this.InternalWhere(column);
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}
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/// <summary>Add where condition.</summary>
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/// <param name="column">Condition column.</param>
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/// <param name="op">Condition operator.</param>
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/// <param name="value">Condition value.</param>
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/// <returns>Builder instance.</returns>
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public virtual IDynamicDeleteQueryBuilder Where(string column, DynamicColumn.CompareOperator op, object value)
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{
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return this.InternalWhere(column, op, value);
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}
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/// <summary>Add where condition.</summary>
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/// <param name="column">Condition column.</param>
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/// <param name="value">Condition value.</param>
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/// <returns>Builder instance.</returns>
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public virtual IDynamicDeleteQueryBuilder Where(string column, object value)
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{
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return this.InternalWhere(column, value);
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}
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/// <summary>Add where condition.</summary>
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/// <param name="conditions">Set conditions as properties and values of an object.</param>
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/// <param name="schema">If <c>true</c> use schema to determine key columns and ignore those which
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/// aren't keys.</param>
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/// <returns>Builder instance.</returns>
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public virtual IDynamicDeleteQueryBuilder Where(object conditions, bool schema = false)
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{
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return this.InternalWhere(conditions, schema);
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}
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#endregion Where
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}
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}
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