/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.plugin;
import java.nio.ByteBuffer;
import org.jnode.permission.JNodePermission;
/**
* Loader of plugin files.
*
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
public abstract class PluginLoader {
private static final JNodePermission CREATE_PERM = new JNodePermission("createPluginLoader");
/**
* Initialize this instance.
* A JNodePermission("createPluginLoader") is required to execute
* this constructor.
*/
public PluginLoader() {
final SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(CREATE_PERM);
}
}
/**
* Open an inputstream for a plugin with a given id and version.
*
* @param pluginId
* @param pluginVersion
* @return The input stream, of null if not found.
*/
public abstract ByteBuffer getPluginBuffer(PluginReference pluginReference);
/**
* Gets the filename of a plugin with a given id and version.
*
* @param pluginId
* @param pluginVersion
* @return the filename of the plugin
*/
public static String getPluginFileName(PluginReference pluginReference) {
return pluginReference.getId() + '_' + pluginReference.getVersion() + ".jar";
}
}