Michael Bayne
6e9077780c
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5829 542714f4-19e9-0310-aa3c-eee0fc999fb1
55 lines
1.6 KiB
ActionScript
55 lines
1.6 KiB
ActionScript
//
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// $Id$
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//
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// Narya library - tools for developing networked games
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// Copyright (C) 2002-2009 Three Rings Design, Inc., All Rights Reserved
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// http://www.threerings.net/code/narya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.util {
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import flash.utils.Dictionary;
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/**
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* A weak reference. At some point in the future the referent might not be available
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* anymore.
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*/
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public class WeakReference
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{
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/**
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* No, you cannot store undefined here.
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*/
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public function WeakReference (referant :Object)
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{
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_ref[referant] = true;
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}
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/**
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* Return the referant, or undefined if it's been collected.
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*/
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public function get () :*
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{
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for (var k :* in _ref) {
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return k;
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}
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return undefined;
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}
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/** The only way to have a weak reference in actionscript. */
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protected var _ref :Dictionary = new Dictionary(true);
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}
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}
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