1 package org.apache.maven.doxia.sink.impl;
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 import java.lang.reflect.Proxy;
26
27 import java.util.List;
28
29 import org.apache.maven.doxia.sink.Sink;
30
31 /**
32 * May be used to invoke the same method on a List of Sinks.
33 *
34 * @author <a href="mailto:trygvis@inamo.no">Trygve Laugstøl</a>
35 * @version $Id$
36 */
37 public class PipelineSink
38 implements InvocationHandler
39 {
40 private List<Sink> pipeline;
41
42 /**
43 * Constructs a PipelineSink for a given List of Sinks.
44 *
45 * @param pipeline A List of Sinks.
46 */
47 public PipelineSink( List<Sink> pipeline )
48 {
49 this.pipeline = pipeline;
50 }
51
52 /**
53 * Add a Sink to the List of Sinks.
54 *
55 * @param sink the Sink to add.
56 */
57 public void addSink( Sink sink )
58 {
59 pipeline.add( sink );
60 }
61
62 /**
63 * {@inheritDoc}
64 *
65 * Invoke a Method on this PipelineSink.
66 *
67 * @throws IllegalAccessException if any.
68 * @throws InvocationTargetException if any.
69 */
70 public Object invoke( Object proxy, Method method, Object[] args )
71 throws IllegalAccessException, InvocationTargetException
72 {
73 for ( Sink sink : pipeline )
74 {
75 method.invoke( sink, args );
76 }
77
78 return null;
79 }
80
81 /**
82 * Returns an instance of a PipelineSink as a Sink.
83 *
84 * @param pipeline A List of Sinks.
85 * @return a {@link org.apache.maven.doxia.sink.Sink} object.
86 */
87 public static Sink newInstance( List<Sink> pipeline )
88 {
89 return (Sink) Proxy.newProxyInstance( PipelineSink.class.getClassLoader(),
90 new Class<?>[]{Sink.class},
91 new PipelineSink( pipeline ) );
92 }
93 }