1 package org.apache.maven.doxia.sink;
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 /**
30 * May be used to invoke the same method on a List of Sinks.
31 *
32 * @author <a href="mailto:trygvis@inamo.no">Trygve Laugstøl</a>
33 * @version $Id: PipelineSink.java 1185112 2011-10-17 11:33:00Z ltheussl $
34 */
35 public class PipelineSink
36 implements InvocationHandler
37 {
38 private List<Sink> pipeline;
39
40 /**
41 * Constructs a PipelineSink for a given List of Sinks.
42 *
43 * @param pipeline A List of Sinks.
44 */
45 public PipelineSink( List<Sink> pipeline )
46 {
47 this.pipeline = pipeline;
48 }
49
50 /**
51 * Add a Sink to the List of Sinks.
52 *
53 * @param sink the Sink to add.
54 */
55 public void addSink( Sink sink )
56 {
57 pipeline.add( sink );
58 }
59
60 /**
61 * {@inheritDoc}
62 *
63 * Invoke a Method on this PipelineSink.
64 *
65 * @throws IllegalAccessException if any.
66 * @throws InvocationTargetException if any.
67 */
68 public Object invoke( Object proxy, Method method, Object[] args )
69 throws IllegalAccessException, InvocationTargetException
70 {
71 for ( Sink sink : pipeline )
72 {
73 method.invoke( sink, args );
74 }
75
76 return null;
77 }
78
79 /**
80 * Returns an instance of a PipelineSink as a Sink.
81 *
82 * @param pipeline A List of Sinks.
83 * @return a {@link org.apache.maven.doxia.sink.Sink} object.
84 */
85 public static Sink newInstance( List<Sink> pipeline )
86 {
87 return (Sink) Proxy.newProxyInstance( PipelineSink.class.getClassLoader(),
88 new Class<?>[]{Sink.class},
89 new PipelineSink( pipeline ) );
90 }
91 }