56 lines
2.0 KiB
C#
56 lines
2.0 KiB
C#
#region Apache License 2.0
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/*
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Nuclex .NET Framework
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Copyright (C) 2002-2024 Markus Ewald / Nuclex Development Labs
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#endregion // Apache License 2.0
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using System;
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using System.Collections.Generic;
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namespace Nuclex.Support.Collections {
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/// <summary>
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/// Compares two values in reverse or reverses the output of another comparer
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/// </summary>
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/// <typeparam name="TCompared">Type of values to be compared</typeparam>
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public class ReverseComparer<TCompared> : IComparer<TCompared> {
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/// <summary>Initializes a new reverse comparer</summary>
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public ReverseComparer() : this(Comparer<TCompared>.Default) { }
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/// <summary>
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/// Initializes the comparer to provide the inverse results of another comparer
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/// </summary>
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/// <param name="comparerToReverse">Comparer whose results will be inversed</param>
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public ReverseComparer(IComparer<TCompared> comparerToReverse) {
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this.comparer = comparerToReverse;
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}
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/// <summary>Compares the left value to the right value</summary>
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/// <param name="left">Value on the left side</param>
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/// <param name="right">Value on the right side</param>
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/// <returns>The relationship of the two values</returns>
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public int Compare(TCompared left, TCompared right) {
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return this.comparer.Compare(right, left); // intentionally reversed
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}
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/// <summary>The default comparer from the .NET framework</summary>
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private IComparer<TCompared> comparer;
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}
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} // namespace Nuclex.Support.Collections
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