content: /**
   * 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.proxy;
  
  import java.lang.reflect.Method;
  import java.util.concurrent.Callable;
  
  /**
   * An {@link InvocationListener} is used in conjunction with the {@link ProxyManager}
   * to intercept method calls on the proxy object
   */
  public interface InvocationListener 
  {
    public Object preInvoke(Object proxy, Method m, Object[] args) throws Throwable;
    
    public void postInvoke(Object token, Object proxy, Method m, Object returnValue) throws Throwable;
    
    public void postInvokeExceptionalReturn(Object token, Object proxy, Method m, Throwable exception) throws Throwable;
  
    default Object aroundInvoke(Object token, Object proxy, Callable<Object> dispatcher, Method method, Object[] args) throws Throwable {
      return method.invoke(dispatcher.call(), args);
    }
  
  }