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 }