50 lines
1.2 KiB
C#
50 lines
1.2 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see LICENSE.
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*/
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#endregion
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using System;
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using System.Collections;
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using System.Collections.Generic;
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namespace OpenRA.FileFormats
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{
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public class Cache<T, U> : IEnumerable<KeyValuePair<T, U>>
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{
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Dictionary<T, U> hax = new Dictionary<T, U>();
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Func<T,U> loader;
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public Cache(Func<T,U> loader)
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{
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if (loader == null)
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throw new ArgumentNullException();
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this.loader = loader;
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}
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public U this[T key]
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{
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get
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{
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U result;
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if (!hax.TryGetValue(key, out result))
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hax.Add(key, result = loader(key));
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return result;
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}
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}
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public IEnumerator<KeyValuePair<T, U>> GetEnumerator() { return hax.GetEnumerator(); }
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IEnumerator IEnumerable.GetEnumerator() { return GetEnumerator(); }
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public IEnumerable<T> Keys { get { return hax.Keys; } }
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public IEnumerable<U> Values { get { return hax.Values; } }
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}
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}
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