53 lines
1.9 KiB
C#
53 lines
1.9 KiB
C#
// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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namespace Microsoft.AspNet.Mvc.Routing
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{
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/// <summary>
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/// An <see cref="IEqualityComparer{object}"/> implementation that compares objects as-if
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/// they were route value strings.
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/// </summary>
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/// <remarks>
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/// Values that are are not strings are converted to strings using
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/// <c>Convert.ToString(x, CultureInfo.InvariantCulture)</c>. <c>null</c> values are converted
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/// to the empty string.
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///
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/// strings are compared using <see cref="StringComparison.OrdinalIgnoreCase"/>.
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/// </remarks>
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public class RouteValueEqualityComparer : IEqualityComparer<object>
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{
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/// <inheritdoc />
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public new bool Equals(object x, object y)
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{
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var stringX = x as string ?? Convert.ToString(x, CultureInfo.InvariantCulture);
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var stringY = y as string ?? Convert.ToString(y, CultureInfo.InvariantCulture);
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if (string.IsNullOrEmpty(stringX) && string.IsNullOrEmpty(stringY))
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{
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return true;
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}
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else
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{
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return string.Equals(stringX, stringY, StringComparison.OrdinalIgnoreCase);
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}
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}
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/// <inheritdoc />
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public int GetHashCode(object obj)
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{
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var stringObj = obj as string ?? Convert.ToString(obj, CultureInfo.InvariantCulture);
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if (string.IsNullOrEmpty(stringObj))
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{
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return StringComparer.OrdinalIgnoreCase.GetHashCode(string.Empty);
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}
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else
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{
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return StringComparer.OrdinalIgnoreCase.GetHashCode(stringObj);
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}
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}
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}
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} |