/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* 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.
*/
package com.liferay.portal.spring.extender.internal.classloader;
import java.io.IOException;
import java.net.URL;
import java.util.Collections;
import java.util.Enumeration;
import org.osgi.framework.Bundle;
/**
* @author Miguel Pastor
*/
public class BundleResolverClassLoader extends ClassLoader {
public BundleResolverClassLoader(Bundle... bundles) {
if (bundles.length == 0) {
throw new IllegalArgumentException(
"At least one bundle is required");
}
_bundles = bundles;
}
@Override
public URL getResource(String name) {
return findResource(name);
}
@Override
public Enumeration<URL> getResources(String name) {
return findResources(name);
}
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
for (Bundle bundle : _bundles) {
try {
return bundle.loadClass(name);
}
catch (ClassNotFoundException cnfe) {
continue;
}
}
throw new ClassNotFoundException(name);
}
@Override
protected URL findResource(String name) {
for (Bundle bundle : _bundles) {
URL url = bundle.getResource(name);
if (url != null) {
return url;
}
}
return null;
}
@Override
protected Enumeration<URL> findResources(String name) {
for (Bundle bundle : _bundles) {
try {
Enumeration<URL> resources = bundle.getResources(name);
if ((resources != null) && resources.hasMoreElements()) {
return resources;
}
}
catch (IOException ioe) {
}
}
return Collections.enumeration(Collections.<URL>emptyList());
}
@Override
protected Class<?> loadClass(String name, boolean resolve)
throws ClassNotFoundException {
Class<?> clazz = findClass(name);
if (resolve) {
resolveClass(clazz);
}
return clazz;
}
private final Bundle[] _bundles;
}