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 * @version $Id$ 036 */ 037public class PipelineSink 038 implements InvocationHandler 039{ 040 private List<Sink> pipeline; 041 042 /** 043 * Constructs a PipelineSink for a given List of Sinks. 044 * 045 * @param pipeline A List of Sinks. 046 */ 047 public PipelineSink( List<Sink> pipeline ) 048 { 049 this.pipeline = pipeline; 050 } 051 052 /** 053 * Add a Sink to the List of Sinks. 054 * 055 * @param sink the Sink to add. 056 */ 057 public void addSink( Sink sink ) 058 { 059 pipeline.add( sink ); 060 } 061 062 /** 063 * {@inheritDoc} 064 * 065 * Invoke a Method on this PipelineSink. 066 * 067 * @throws IllegalAccessException if any. 068 * @throws InvocationTargetException if any. 069 */ 070 public Object invoke( Object proxy, Method method, Object[] args ) 071 throws IllegalAccessException, InvocationTargetException 072 { 073 for ( Sink sink : pipeline ) 074 { 075 method.invoke( sink, args ); 076 } 077 078 return null; 079 } 080 081 /** 082 * Returns an instance of a PipelineSink as a Sink. 083 * 084 * @param pipeline A List of Sinks. 085 * @return a {@link org.apache.maven.doxia.sink.Sink} object. 086 */ 087 public static Sink newInstance( List<Sink> pipeline ) 088 { 089 return (Sink) Proxy.newProxyInstance( PipelineSink.class.getClassLoader(), 090 new Class<?>[]{Sink.class}, 091 new PipelineSink( pipeline ) ); 092 } 093}