| /* |
| * 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.felix.mosgi.jmx.rmiconnector.mx4j.remote.rmi; |
| |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| |
| import javax.management.MBeanServerConnection; |
| |
| import org.apache.felix.mosgi.jmx.rmiconnector.mx4j.remote.ClientProxy; |
| |
| /** |
| * An MBeanServerConnection proxy that performs the setting of the appropriate context classloader |
| * to allow classloading of classes sent by the server but not known to the client, in methods like |
| * {@link MBeanServerConnection#getAttribute}, {@link MBeanServerConnection#invoke} and so on. |
| * |
| * @author <a href="mailto:biorn_steedom@users.sourceforge.net">Simone Bordet</a> |
| * @version $Revision: 1.1.1.1 $ |
| */ |
| public class ClientUnmarshaller extends ClientProxy |
| { |
| private final ClassLoader classLoader; |
| |
| private ClientUnmarshaller(MBeanServerConnection target, ClassLoader loader) |
| { |
| super(target); |
| this.classLoader = loader; |
| } |
| |
| public static MBeanServerConnection newInstance(MBeanServerConnection target, ClassLoader loader) |
| { |
| ClientUnmarshaller handler = new ClientUnmarshaller(target, loader); |
| return (MBeanServerConnection)Proxy.newProxyInstance(handler.getClass().getClassLoader(), new Class[]{MBeanServerConnection.class}, handler); |
| } |
| |
| public Object invoke(Object proxy, Method method, Object[] args) throws Throwable |
| { |
| if (classLoader == null) |
| { |
| return chain(proxy, method, args); |
| } |
| else |
| { |
| ClassLoader old = Thread.currentThread().getContextClassLoader(); |
| try |
| { |
| setContextClassLoader(classLoader); |
| return chain(proxy, method, args); |
| } |
| finally |
| { |
| setContextClassLoader(old); |
| } |
| } |
| } |
| |
| private Object chain(Object proxy, Method method, Object[] args) throws Throwable |
| { |
| return super.invoke(proxy, method, args); |
| } |
| |
| private void setContextClassLoader(final ClassLoader loader) |
| { |
| AccessController.doPrivileged(new PrivilegedAction() |
| { |
| public Object run() |
| { |
| Thread.currentThread().setContextClassLoader(loader); |
| return null; |
| } |
| }); |
| } |
| } |