| /* |
| * 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.dm.runtime; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.lang.reflect.Proxy; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| |
| /** |
| * Java reflexion utility methods. |
| * |
| * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| */ |
| public class InvocationUtil |
| { |
| public static Object invokeCallbackMethod(Object instance, |
| String methodName, |
| Class<?>[][] signatures, |
| Object[][] parameters) |
| throws NoSuchMethodException, IllegalArgumentException, IllegalAccessException, |
| InvocationTargetException |
| { |
| Class<?> currentClazz = instance.getClass(); |
| while (currentClazz != null) |
| { |
| try |
| { |
| return invokeMethod(instance, currentClazz, methodName, signatures, parameters, false); |
| } |
| catch (NoSuchMethodException nsme) |
| { |
| // ignore |
| } |
| currentClazz = currentClazz.getSuperclass(); |
| } |
| throw new NoSuchMethodException(methodName); |
| } |
| |
| public static Object invokeMethod(Object object, |
| Class<?> clazz, |
| String name, |
| Class<?>[][] signatures, |
| Object[][] parameters, |
| boolean isSuper) |
| throws NoSuchMethodException, InvocationTargetException, IllegalArgumentException, |
| IllegalAccessException |
| { |
| if (object == null) |
| { |
| throw new IllegalArgumentException("Instance cannot be null"); |
| } |
| if (clazz == null) |
| { |
| throw new IllegalArgumentException("Class cannot be null"); |
| } |
| |
| // If we're talking to a proxy here, dig one level deeper to expose the |
| // underlying invocation handler ... |
| |
| if (Proxy.isProxyClass(clazz)) |
| { |
| object = Proxy.getInvocationHandler(object); |
| clazz = object.getClass(); |
| } |
| |
| for (int i = 0; i < signatures.length; i++) |
| { |
| Class<?>[] signature = signatures[i]; |
| try |
| { |
| final Method m = clazz.getDeclaredMethod(name, signature); |
| if (!(isSuper && Modifier.isPrivate(m.getModifiers()))) |
| { |
| AccessController.doPrivileged(new PrivilegedAction<Object>() |
| { |
| public Object run() |
| { |
| m.setAccessible(true); |
| return null; |
| } |
| }); |
| return m.invoke(object, parameters[i]); |
| } |
| } |
| catch (NoSuchMethodException e) |
| { |
| // ignore this and keep looking |
| } |
| } |
| throw new NoSuchMethodException(name); |
| } |
| } |