| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.aries.blueprint.utils; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| |
| import org.osgi.framework.Bundle; |
| |
| /** |
| * A ClassLoader delegating to a given OSGi bundle. |
| * |
| * @version $Rev: 954428 $, $Date: 2010-06-14 13:32:07 +0100 (Mon, 14 Jun 2010) $ |
| */ |
| public class BundleDelegatingClassLoader extends ClassLoader { |
| |
| private final Bundle bundle; |
| private final ClassLoader classLoader; |
| |
| public BundleDelegatingClassLoader(Bundle bundle) { |
| this(bundle, null); |
| } |
| |
| public BundleDelegatingClassLoader(Bundle bundle, ClassLoader classLoader) { |
| this.bundle = bundle; |
| this.classLoader = classLoader; |
| } |
| |
| protected Class findClass(final String name) throws ClassNotFoundException { |
| try { |
| return AccessController.doPrivileged(new PrivilegedExceptionAction<Class<?>>() { |
| public Class<?> run() throws ClassNotFoundException |
| { |
| return bundle.loadClass(name); |
| } |
| |
| }); |
| } catch (PrivilegedActionException e) { |
| Exception cause = e.getException(); |
| |
| if (cause instanceof ClassNotFoundException) throw (ClassNotFoundException)cause; |
| else throw (RuntimeException)cause; |
| } |
| } |
| |
| protected URL findResource(final String name) { |
| URL resource = AccessController.doPrivileged(new PrivilegedAction<URL>() { |
| public URL run() |
| { |
| return bundle.getResource(name); |
| } |
| }); |
| if (classLoader != null && resource == null) { |
| resource = classLoader.getResource(name); |
| } |
| return resource; |
| } |
| |
| protected Enumeration findResources(final String name) throws IOException { |
| Enumeration<URL> urls; |
| try { |
| urls = AccessController.doPrivileged(new PrivilegedExceptionAction<Enumeration<URL>>() { |
| @SuppressWarnings("unchecked") |
| public Enumeration<URL> run() throws IOException |
| { |
| return (Enumeration<URL>)bundle.getResources(name); |
| } |
| |
| }); |
| } catch (PrivilegedActionException e) { |
| Exception cause = e.getException(); |
| |
| if (cause instanceof IOException) throw (IOException)cause; |
| else throw (RuntimeException)cause; |
| } |
| |
| if (urls == null) { |
| urls = Collections.enumeration(new ArrayList<URL>()); |
| } |
| |
| return urls; |
| } |
| |
| protected Class loadClass(String name, boolean resolve) throws ClassNotFoundException { |
| Class clazz; |
| try { |
| clazz = findClass(name); |
| } |
| catch (ClassNotFoundException cnfe) { |
| if (classLoader != null) { |
| try { |
| clazz = classLoader.loadClass(name); |
| } catch (ClassNotFoundException e) { |
| throw new ClassNotFoundException(name + " from bundle " + bundle.getBundleId() + " (" + bundle.getSymbolicName() + ")", cnfe); |
| } |
| } else { |
| throw new ClassNotFoundException(name + " from bundle " + bundle.getBundleId() + " (" + bundle.getSymbolicName() + ")", cnfe); |
| } |
| } |
| if (resolve) { |
| resolveClass(clazz); |
| } |
| return clazz; |
| } |
| |
| public Bundle getBundle() { |
| return bundle; |
| } |
| } |