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#pragma warning disable 659 // overrides AddToHashCodeCombiner instead
/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation. All rights reserved.
*
* This software is subject to the Microsoft Public License (Ms-PL).
* A copy of the license can be found in the license.htm file included
* in this distribution.
*
* You must not remove this notice, or any other, from this software.
*
* ***************************************************************************/
namespace System.Web.Mvc.ExpressionUtil {
using System;
using System.Diagnostics.CodeAnalysis;
using System.Linq.Expressions;
// ConditionalExpression fingerprint class
// Expression of form (test) ? ifTrue : ifFalse
[SuppressMessage("Microsoft.Usage", "CA2218:OverrideGetHashCodeOnOverridingEquals",
Justification = "Overrides AddToHashCodeCombiner() instead.")]
internal sealed class ConditionalExpressionFingerprint : ExpressionFingerprint {
private ConditionalExpressionFingerprint(ConditionalExpression expression)
: base(expression) {
}
public ExpressionFingerprint Test {
get;
private set;
}
public ExpressionFingerprint IfTrue {
get;
private set;
}
public ExpressionFingerprint IfFalse {
get;
private set;
}
internal override void AddToHashCodeCombiner(HashCodeCombiner combiner) {
base.AddToHashCodeCombiner(combiner);
combiner.AddFingerprint(Test);
combiner.AddFingerprint(IfTrue);
combiner.AddFingerprint(IfFalse);
}
public static ConditionalExpressionFingerprint Create(ConditionalExpression expression, ParserContext parserContext) {
// if any fingerprinting fails, bail out
ExpressionFingerprint test = Create(expression.Test, parserContext);
if (test == null && expression.Test != null) {
return null;
}
ExpressionFingerprint ifTrue = Create(expression.IfTrue, parserContext);
if (ifTrue == null && expression.IfTrue != null) {
return null;
}
ExpressionFingerprint ifFalse = Create(expression.IfFalse, parserContext);
if (ifFalse == null && expression.IfFalse != null) {
return null;
}
return new ConditionalExpressionFingerprint(expression) {
Test = test,
IfTrue = ifTrue,
IfFalse = ifFalse
};
}
public override bool Equals(object obj) {
ConditionalExpressionFingerprint other = obj as ConditionalExpressionFingerprint;
if (other == null) {
return false;
}
return (Object.Equals(this.Test, other.Test)
&& Object.Equals(this.IfTrue, other.IfTrue)
&& Object.Equals(this.IfFalse, other.IfFalse)
&& base.Equals(other));
}
public override Expression ToExpression(ParserContext parserContext) {
Expression testExpr = ToExpression(Test, parserContext);
Expression ifTrueExpr = ToExpression(IfTrue, parserContext);
Expression ifFalseExpr = ToExpression(IfFalse, parserContext);
return Expression.Condition(testExpr, ifTrueExpr, ifFalseExpr);
}
}
}
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