1 package org.apache.maven.index.cli;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.lang.reflect.InvocationHandler;
23 import java.lang.reflect.InvocationTargetException;
24 import java.lang.reflect.Method;
25
26 /**
27 * An {@link java.lang.reflect.InvocationHandler} that can be extended with methods from the proxied interface. While
28 * invocation it will look for a method within itself that matches the signature of the invoked proxy method. If found
29 * the method will be invoked and result returned, otherwise an {@link UnsupportedOperationException} will be thrown.
30 *
31 * @author Alin Dreghiciu
32 */
33 public class PartialImplementation
34 implements InvocationHandler
35 {
36
37 public Object invoke( final Object proxy, final Method method, final Object[] args )
38 throws Throwable
39 {
40 try
41 {
42 final Method localMethod = getClass().getMethod( method.getName(), method.getParameterTypes() );
43 return localMethod.invoke( this, args );
44 }
45 catch ( NoSuchMethodException e )
46 {
47 throw new UnsupportedOperationException( "Method " + method.getName() + "() is not supported" );
48 }
49 catch ( IllegalAccessException e )
50 {
51 throw new UnsupportedOperationException( "Method " + method.getName() + "() is not supported" );
52 }
53 catch ( InvocationTargetException e )
54 {
55 throw e.getCause();
56 }
57 }
58
59 }