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