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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.commons.proxy;
19  
20  import java.lang.reflect.Method;
21  
22  /**
23   * An invoker is responsible for handling a method invocation.
24   * 
25   * @author James Carman
26   * @since 1.0
27   */
28  public interface Invoker
29  {
30      /**
31       * "Invokes" the method.  Implementation should throw a {@link org.apache.commons.proxy.exception.InvokerException}
32       * if problems arise while trying to invoke the method.
33       * @param proxy the proxy object
34       * @param method the method being invoked
35       * @param arguments the arguments
36       * @return the return value
37       * @throws Throwable thrown by the implementation
38       */
39      public Object invoke( Object proxy, Method method, Object[] arguments ) throws Throwable;
40  }