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//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------
#pragma warning disable 1634, 1691 // Stops compiler from warning about unknown warnings (for Presharp)
namespace System
{
using System.Collections.Generic;
using System.ServiceModel;
using System.Runtime.CompilerServices;
[TypeForwardedFrom("System.ServiceModel.Web, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35")]
public class UriTemplateEquivalenceComparer : IEqualityComparer<UriTemplate>
{
static UriTemplateEquivalenceComparer instance;
internal static UriTemplateEquivalenceComparer Instance
{
get
{
if (instance == null)
{
// lock-free, fine if we allocate more than one
instance = new UriTemplateEquivalenceComparer();
}
return instance;
}
}
public bool Equals(UriTemplate x, UriTemplate y)
{
if (x == null)
{
return y == null;
}
return x.IsEquivalentTo(y);
}
public int GetHashCode(UriTemplate obj)
{
if (obj == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("obj");
}
#pragma warning disable 56506 // obj.xxx is never null
// prefer final literal segment (common literal prefixes are common in some scenarios)
for (int i = obj.segments.Count - 1; i >= 0; --i)
{
if (obj.segments[i].Nature == UriTemplatePartType.Literal)
{
return obj.segments[i].GetHashCode();
}
}
return obj.segments.Count + obj.queries.Count;
#pragma warning restore 56506
}
}
}
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