94 lines
3.7 KiB
C#
94 lines
3.7 KiB
C#
#region License
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// Copyright (c) 2007 James Newton-King
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#endregion
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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 LC.Newtonsoft.Json.Utilities
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{
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internal class BidirectionalDictionary<TFirst, TSecond>
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{
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private readonly IDictionary<TFirst, TSecond> _firstToSecond;
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private readonly IDictionary<TSecond, TFirst> _secondToFirst;
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private readonly string _duplicateFirstErrorMessage;
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private readonly string _duplicateSecondErrorMessage;
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public BidirectionalDictionary()
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: this(EqualityComparer<TFirst>.Default, EqualityComparer<TSecond>.Default)
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{
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}
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public BidirectionalDictionary(IEqualityComparer<TFirst> firstEqualityComparer, IEqualityComparer<TSecond> secondEqualityComparer)
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: this(
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firstEqualityComparer,
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secondEqualityComparer,
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"Duplicate item already exists for '{0}'.",
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"Duplicate item already exists for '{0}'.")
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{
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}
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public BidirectionalDictionary(IEqualityComparer<TFirst> firstEqualityComparer, IEqualityComparer<TSecond> secondEqualityComparer,
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string duplicateFirstErrorMessage, string duplicateSecondErrorMessage)
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{
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_firstToSecond = new Dictionary<TFirst, TSecond>(firstEqualityComparer);
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_secondToFirst = new Dictionary<TSecond, TFirst>(secondEqualityComparer);
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_duplicateFirstErrorMessage = duplicateFirstErrorMessage;
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_duplicateSecondErrorMessage = duplicateSecondErrorMessage;
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}
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public void Set(TFirst first, TSecond second)
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{
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if (_firstToSecond.TryGetValue(first, out TSecond existingSecond))
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{
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if (!existingSecond.Equals(second))
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{
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throw new ArgumentException(_duplicateFirstErrorMessage.FormatWith(CultureInfo.InvariantCulture, first));
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}
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}
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if (_secondToFirst.TryGetValue(second, out TFirst existingFirst))
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{
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if (!existingFirst.Equals(first))
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{
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throw new ArgumentException(_duplicateSecondErrorMessage.FormatWith(CultureInfo.InvariantCulture, second));
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}
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}
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_firstToSecond.Add(first, second);
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_secondToFirst.Add(second, first);
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}
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public bool TryGetByFirst(TFirst first, out TSecond second)
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{
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return _firstToSecond.TryGetValue(first, out second);
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}
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public bool TryGetBySecond(TSecond second, out TFirst first)
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{
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return _secondToFirst.TryGetValue(second, out first);
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}
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}
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} |