/*
* $Id$
*
* Copyright (C) 2003-2014 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.protocol.plugin;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import javax.naming.NameNotFoundException;
import org.jnode.naming.InitialNaming;
import org.jnode.plugin.PluginDescriptor;
import org.jnode.plugin.PluginManager;
import org.jnode.plugin.model.PluginDescriptorModel;
import org.jnode.plugin.model.PluginJar;
import org.jnode.util.ByteBufferInputStream;
/**
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
public class PluginURLConnection extends URLConnection {
private final String pluginId;
private final String path;
private transient PluginJar jarFile;
/**
* @param url
*/
public PluginURLConnection(URL url) throws MalformedURLException {
super(url);
final String protoPrefix = "plugin:";
final String fullUrl = url.toExternalForm();
if (!fullUrl.startsWith(protoPrefix)) {
throw new MalformedURLException("plugin protocol expected");
}
final int idx = fullUrl.indexOf("!/");
if (idx < 0) {
throw new MalformedURLException("!/ expected");
}
this.pluginId = fullUrl.substring(protoPrefix.length(), idx);
this.path = fullUrl.substring(idx + 2);
}
/**
* @see java.net.URLConnection#connect()
*/
public void connect() throws IOException {
try {
final PluginManager pluginMgr = InitialNaming.lookup(PluginManager.NAME);
final PluginDescriptor descr = pluginMgr.getRegistry().getPluginDescriptor(pluginId);
if (descr == null) {
throw new IOException("Plugin " + pluginId + " not found");
}
this.jarFile = ((PluginDescriptorModel) descr).getJarFile();
if (this.jarFile == null) {
throw new IOException("Plugin jarfile not found");
}
} catch (NameNotFoundException ex) {
final IOException ioe = new IOException("Cannot find plugin manager");
ioe.initCause(ex);
throw ioe;
}
}
/**
* @see java.net.URLConnection#getInputStream()
*/
public InputStream getInputStream() throws IOException {
if (jarFile == null) {
connect();
}
return new ByteBufferInputStream(jarFile.getResourceAsBuffer(path));
}
}