56 lines
911 B
C#
56 lines
911 B
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2011 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 COPYING.
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*/
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#endregion
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using System;
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namespace OpenRA.FileFormats
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{
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public class Cached<T>
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{
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Func<T> p;
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T value;
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bool hasValue;
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public Cached(Func<T> p)
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{
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if (p == null)
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throw new ArgumentNullException();
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this.p = p;
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}
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public T Value
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{
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get
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{
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if (hasValue)
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return value;
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value = p();
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hasValue = true;
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return value;
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}
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}
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public T Force() { return Value; }
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public void Invalidate()
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{
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hasValue = false;
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}
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}
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public static class Cached
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{
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public static Cached<T> New<T>(Func<T> p) { return new Cached<T>(p); }
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}
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}
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