91 lines
2.4 KiB
C#
91 lines
2.4 KiB
C#
//
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// DoubleDictionary.cs
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//
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// Authors:
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// Alexander Chebaturkin (chebaturkin@gmail.com)
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//
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// Copyright (C) 2011 Alexander Chebaturkin
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following 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 OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Collections.Generic;
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using System.Linq;
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namespace Mono.CodeContracts.Static.DataStructures {
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class DoubleDictionary<A, B, C> : Dictionary<A, Dictionary<B, C>> {
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public C this [A a, B b]
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{
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get { return base [a] [b]; }
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set
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{
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Dictionary<B, C> dict;
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if (!base.TryGetValue (a, out dict)) {
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dict = new Dictionary<B, C> ();
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base.Add (a, dict);
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}
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dict [b] = value;
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}
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}
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public IEnumerable<A> Keys1
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{
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get { return base.Keys; }
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}
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public void Add (A a, B b, C value)
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{
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Dictionary<B, C> dict;
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if (!base.TryGetValue (a, out dict)) {
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dict = new Dictionary<B, C> ();
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base.Add (a, dict);
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}
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dict.Add (b, value);
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}
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public IEnumerable<B> Keys2 (A a)
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{
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Dictionary<B, C> dict;
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if (base.TryGetValue (a, out dict))
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return dict.Keys;
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return Enumerable.Empty<B> ();
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}
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public bool ContainsKey (A a, B b)
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{
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Dictionary<B, C> dict;
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if (!base.TryGetValue (a, out dict))
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return false;
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return dict.ContainsKey (b);
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}
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public bool TryGetValue (A a, B b, out C value)
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{
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Dictionary<B, C> dict;
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if (base.TryGetValue (a, out dict))
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return dict.TryGetValue (b, out value);
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value = default(C);
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return false;
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}
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}
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}
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