001package org.apache.maven.doxia.sink.impl; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import java.lang.reflect.InvocationHandler; 023import java.lang.reflect.InvocationTargetException; 024import java.lang.reflect.Method; 025import java.lang.reflect.Proxy; 026 027import java.util.List; 028 029import org.apache.maven.doxia.sink.Sink; 030 031/** 032 * May be used to invoke the same method on a List of Sinks. 033 * 034 * @author <a href="mailto:trygvis@inamo.no">Trygve Laugstøl</a> 035 */ 036public class PipelineSink 037 implements InvocationHandler 038{ 039 private List<Sink> pipeline; 040 041 /** 042 * Constructs a PipelineSink for a given List of Sinks. 043 * 044 * @param pipeline A List of Sinks. 045 */ 046 public PipelineSink( List<Sink> pipeline ) 047 { 048 this.pipeline = pipeline; 049 } 050 051 /** 052 * Add a Sink to the List of Sinks. 053 * 054 * @param sink the Sink to add. 055 */ 056 public void addSink( Sink sink ) 057 { 058 pipeline.add( sink ); 059 } 060 061 /** 062 * {@inheritDoc} 063 * 064 * Invoke a Method on this PipelineSink. 065 * 066 * @throws IllegalAccessException if any. 067 * @throws InvocationTargetException if any. 068 * @param proxy a {@link java.lang.Object} object. 069 * @param method a {@link java.lang.reflect.Method} object. 070 * @param args an array of {@link java.lang.Object} objects. 071 * @return a {@link java.lang.Object} object. 072 */ 073 public Object invoke( Object proxy, Method method, Object[] args ) 074 throws IllegalAccessException, InvocationTargetException 075 { 076 for ( Sink sink : pipeline ) 077 { 078 method.invoke( sink, args ); 079 } 080 081 return null; 082 } 083 084 /** 085 * Returns an instance of a PipelineSink as a Sink. 086 * 087 * @param pipeline A List of Sinks. 088 * @return a {@link org.apache.maven.doxia.sink.Sink} object. 089 */ 090 public static Sink newInstance( List<Sink> pipeline ) 091 { 092 return (Sink) Proxy.newProxyInstance( PipelineSink.class.getClassLoader(), 093 new Class<?>[]{Sink.class}, 094 new PipelineSink( pipeline ) ); 095 } 096}