/*
GNU GENERAL PUBLIC LICENSE
Copyright (C) 2006 The Lobo Project
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
verion 2 of the License, or (at your option) any later version.
This program 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
General Public License for more details.
You should have received a copy of the GNU General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Contact info: lobochief@users.sourceforge.net
*/
/*
* Created on Jun 19, 2005
*/
package org.lobobrowser.primary.clientlets;
import java.io.IOException;
import java.io.InputStream;
import java.net.Proxy;
import java.net.URL;
import java.net.URLConnection;
import java.security.AccessController;
import java.security.CodeSource;
import java.security.PrivilegedAction;
import java.util.Collections;
import java.util.Enumeration;
import java.util.jar.JarFile;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.ZipEntry;
import org.lobobrowser.util.BaseClassLoader;
import org.lobobrowser.util.CollectionUtilities;
import org.lobobrowser.util.GenericURLConnection;
import org.lobobrowser.util.io.IORoutines;
/**
* @author J. H. S.
*/
public class ArchiveClassLoader extends BaseClassLoader {
private static final Logger logger = Logger.getLogger(ArchiveClassLoader.class.getName());
/**
* @author J. H. S.
*/
public class LocalURLStreamHandler extends java.net.URLStreamHandler {
private final String resourceName;
/**
*
*/
public LocalURLStreamHandler(final String resourceName) {
super();
this.resourceName = resourceName;
}
/*
* (non-Javadoc)
*
* @see java.net.URLStreamHandler#openConnection(java.net.URL)
*/
@Override
protected URLConnection openConnection(final URL u) throws IOException {
return new GenericURLConnection(u, getResourceAsStreamImpl(this.resourceName));
}
/*
* (non-Javadoc)
*
* @see java.net.URLStreamHandler#openConnection(java.net.URL,
* java.net.Proxy)
*/
@Override
protected URLConnection openConnection(final URL u, final Proxy p) throws IOException {
return this.openConnection(u);
}
}
private final ArchiveInfo[] archiveInfos;
/**
* @param targetParent
*/
ArchiveClassLoader(final java.util.Collection<ArchiveInfo> archiveInfos) throws IOException {
super(ArchiveClassLoader.class.getClassLoader());
this.archiveInfos = archiveInfos.toArray(ArchiveInfo.EMPTY_ARRAY);
}
/*
* (non-Javadoc)
*
* @see java.lang.ClassLoader#findClass(java.lang.String)
*/
@Override
protected Class<?> findClass(final String arg0) throws ClassNotFoundException {
final String subPath = arg0.replace('.', '/') + ".class";
final ArchiveInfo[] ainfos = this.archiveInfos;
final int len = ainfos.length;
byte[] classBytes = null;
final ArchiveInfo[] foundAinfo = new ArchiveInfo[1];
for (int i = 0; i < len; i++) {
final ArchiveInfo ainfo = ainfos[i];
try {
final JarFile jarFile = ainfo.getJarFile();
classBytes = AccessController.doPrivileged(new PrivilegedAction<byte[]>() {
public byte[] run() {
try {
final ZipEntry entry = jarFile.getEntry(subPath);
if (entry == null) {
return null;
}
try (final java.io.InputStream in = jarFile.getInputStream(entry)) {
final byte[] bytes = IORoutines.loadExact(in, (int) entry.getSize());
foundAinfo[0] = ainfo;
return bytes;
}
} catch (final IOException ioe) {
return null;
}
}
});
} catch (final IOException ioe2) {
continue;
}
if (classBytes != null) {
break;
}
}
if (classBytes == null) {
throw new ClassNotFoundException("I/O error or entry not found: " + subPath);
}
// TODO Signers Certificates
final CodeSource cs = new CodeSource(foundAinfo[0].url, new java.security.cert.Certificate[0]);
return this.defineClass(arg0, classBytes, 0, classBytes.length, cs);
}
/*
* (non-Javadoc)
*
* @see java.lang.ClassLoader#findResource(java.lang.String)
*/
@Override
protected URL findResource(final String name) {
try {
return AccessController.doPrivileged(new PrivilegedAction<java.net.URL>() {
public java.net.URL run() {
try {
return new java.net.URL(null, "volatile:" + name, new LocalURLStreamHandler(name));
} catch (final java.net.MalformedURLException mfu) {
throw new IllegalStateException(mfu.getMessage());
}
}
});
} catch (final RuntimeException err) {
logger.log(Level.SEVERE, "findResource()", err);
throw err;
}
}
/*
* (non-Javadoc)
*
* @see java.lang.ClassLoader#findResources(java.lang.String)
*/
@Override
protected Enumeration<URL> findResources(final String name) throws IOException {
final URL url = this.findResource(name);
if (url != null) {
return CollectionUtilities.getIteratorEnumeration(Collections.singletonList(url).iterator());
} else {
return CollectionUtilities.getEmptyEnumeration();
}
}
private java.io.InputStream getResourceAsStreamImpl(final String resourceName) {
final ArchiveInfo[] ainfos = this.archiveInfos;
final int len = ainfos.length;
InputStream in = null;
for (int i = 0; i < len; i++) {
final ArchiveInfo ainfo = ainfos[i];
try {
final JarFile jarFile = ainfo.getJarFile();
in = AccessController.doPrivileged(new PrivilegedAction<InputStream>() {
public InputStream run() {
try {
final ZipEntry entry = jarFile.getEntry(resourceName);
if (entry == null) {
return null;
}
return jarFile.getInputStream(entry);
} catch (final IOException ioe) {
return null;
}
}
});
} catch (final IOException ioe2) {
continue;
}
if (in != null) {
break;
}
}
if (in == null) {
final ClassLoader parent = this.getParent();
return parent != null ? parent.getResourceAsStream(resourceName) : null;
} else {
return in;
}
}
}