98 lines
2.8 KiB
C#
98 lines
2.8 KiB
C#
//---------------------------------------------------------------------
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// <copyright file="CaseExpr.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//
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// @owner [....]
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// @backupOwner [....]
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//---------------------------------------------------------------------
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namespace System.Data.Common.EntitySql.AST
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{
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using System;
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using System.Globalization;
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using System.Collections;
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using System.Collections.Generic;
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/// <summary>
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/// Represents the Seached Case Expression - CASE WHEN THEN [ELSE] END.
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/// </summary>
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internal sealed class CaseExpr : Node
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{
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private readonly NodeList<WhenThenExpr> _whenThenExpr;
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private readonly Node _elseExpr;
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/// <summary>
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/// Initializes case expression without else sub-expression.
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/// </summary>
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/// <param name="whenThenExpr">whenThen expression list</param>
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internal CaseExpr(NodeList<WhenThenExpr> whenThenExpr)
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: this(whenThenExpr, null)
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{
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}
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/// <summary>
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/// Initializes case expression with else sub-expression.
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/// </summary>
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/// <param name="whenThenExpr">whenThen expression list</param>
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/// <param name="elseExpr">else expression</param>
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internal CaseExpr(NodeList<WhenThenExpr> whenThenExpr, Node elseExpr)
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{
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_whenThenExpr = whenThenExpr;
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_elseExpr = elseExpr;
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}
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/// <summary>
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/// Returns the list of WhenThen expressions.
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/// </summary>
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internal NodeList<WhenThenExpr> WhenThenExprList
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{
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get { return _whenThenExpr; }
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}
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/// <summary>
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/// Returns the optional Else expression.
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/// </summary>
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internal Node ElseExpr
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{
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get { return _elseExpr; }
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}
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}
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/// <summary>
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/// Represents the when then sub expression.
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/// </summary>
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internal class WhenThenExpr : Node
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{
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private readonly Node _whenExpr;
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private readonly Node _thenExpr;
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/// <summary>
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/// Initializes WhenThen sub-expression.
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/// </summary>
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/// <param name="whenExpr">When expression</param>
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/// <param name="thenExpr">Then expression</param>
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internal WhenThenExpr(Node whenExpr, Node thenExpr)
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{
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_whenExpr = whenExpr;
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_thenExpr = thenExpr;
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}
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/// <summary>
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/// Returns When expression.
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/// </summary>
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internal Node WhenExpr
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{
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get { return _whenExpr; }
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}
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/// <summary>
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/// Returns Then Expression.
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/// </summary>
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internal Node ThenExpr
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{
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get { return _thenExpr; }
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}
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}
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}
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