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/*****************************************************************************
* Java Plug-in Framework (JPF)
* Copyright (C) 2004-2007 Dmitry Olshansky
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*****************************************************************************/
package org.java.plugin;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLStreamHandlerFactory;
import org.java.plugin.registry.PluginDescriptor;
/**
* Extension to Java class loader API. One instance of this class should be
* created by {@link org.java.plugin.PluginManager plug-in manager} for every
* available plug-in.
*
* @version $Id$
*/
public abstract class PluginClassLoader extends URLClassLoader {
private final PluginManager manager;
private final PluginDescriptor descriptor;
/**
* @param aManager plug-in manager
* @param descr plug-in descriptor
* @param urls resources "managed" by this class loader
* @param parent parent class loader
* @param factory URL stream handler factory
* @see URLClassLoader#URLClassLoader(java.net.URL[], java.lang.ClassLoader,
* java.net.URLStreamHandlerFactory)
*/
protected PluginClassLoader(final PluginManager aManager,
final PluginDescriptor descr, final URL[] urls,
final ClassLoader parent, final URLStreamHandlerFactory factory) {
super(urls, parent, factory);
manager = aManager;
descriptor = descr;
}
/**
* @param aManager plug-in manager
* @param descr plug-in descriptor
* @param urls resources "managed" by this class loader
* @param parent parent class loader
* @see URLClassLoader#URLClassLoader(java.net.URL[], java.lang.ClassLoader)
*/
protected PluginClassLoader(final PluginManager aManager,
final PluginDescriptor descr, final URL[] urls,
final ClassLoader parent) {
super(urls, parent);
manager = aManager;
descriptor = descr;
}
/**
* @param aManager plug-in manager
* @param descr plug-in descriptor
* @param urls resources "managed" by this class loader
* @see URLClassLoader#URLClassLoader(java.net.URL[])
*/
protected PluginClassLoader(final PluginManager aManager,
final PluginDescriptor descr, final URL[] urls) {
super(urls);
manager = aManager;
descriptor = descr;
}
/**
* @return returns the plug-in manager
*/
public PluginManager getPluginManager() {
return manager;
}
/**
* @return returns the plug-in descriptor
*/
public PluginDescriptor getPluginDescriptor() {
return descriptor;
}
/**
* Should release all resources acquired by this class loader instance.
*/
protected abstract void dispose();
/**
* Registry data change notification.
*/
protected abstract void pluginsSetChanged();
/**
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "{PluginClassLoader: uid=" //$NON-NLS-1$
+ System.identityHashCode(this) + "; " //$NON-NLS-1$
+ descriptor + "}"; //$NON-NLS-1$
}
}
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