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Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically
embedded into Java applications to provide scripting to end users.
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript.commonjs.module.provider;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.ref.ReferenceQueue;
import java.lang.ref.SoftReference;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.Script;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.commonjs.module.ModuleScript;
/**
* A module script provider that uses a module source provider to load modules
* and caches the loaded modules. It softly references the loaded modules'
* Rhino {@link Script} objects, thus a module once loaded can become eligible
* for garbage collection if it is otherwise unused under memory pressure.
* Instances of this class are thread safe.
* @author Attila Szegedi
* @version $Id: SoftCachingModuleScriptProvider.java,v 1.3 2011/04/07 20:26:12 hannes%helma.at Exp $
*/
public class SoftCachingModuleScriptProvider extends CachingModuleScriptProviderBase {
private static final long serialVersionUID = 1L;
private transient ReferenceQueue