/*
* 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.karaf.management.internal;
import javax.management.MBeanServer;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class MBeanInvocationHandler implements InvocationHandler {
private final MBeanServer wrapped;
private final InvocationHandler guard;
private final List<String> guarded = Collections.unmodifiableList(Arrays.asList("invoke", "getAttribute", "getAttributes", "setAttribute", "setAttributes"));
public MBeanInvocationHandler(MBeanServer mBeanServer, InvocationHandler guard) {
wrapped = mBeanServer;
this.guard = guard;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if (guarded.contains(method.getName())) {
guard.invoke(proxy, method, args);
}
if (method.getName().equals("equals") && method.getParameterTypes().length == 1 && method.getParameterTypes()[0] == Object.class) {
Object target = args[0];
if (target != null && Proxy.isProxyClass(target.getClass())) {
InvocationHandler handler = Proxy.getInvocationHandler(target);
if (handler instanceof MBeanInvocationHandler) {
args[0] = ((MBeanInvocationHandler) handler).wrapped;
}
}
} else if (method.getName().equals("finalize") && method.getParameterTypes().length == 0) {
// special case finalize, don't route through to delegate because that will get its own call
return null;
}
try {
return method.invoke(wrapped, args);
} catch (InvocationTargetException e) {
throw e.getCause();
}
}
}