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 }