001package org.apache.maven.doxia.sink; 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; 028 029/** 030 * May be used to invoke the same method on a List of Sinks. 031 * 032 * @author <a href="mailto:trygvis@inamo.no">Trygve Laugstøl</a> 033 * @version $Id$ 034 */ 035public class PipelineSink 036 implements InvocationHandler 037{ 038 private List<Sink> pipeline; 039 040 /** 041 * Constructs a PipelineSink for a given List of Sinks. 042 * 043 * @param pipeline A List of Sinks. 044 */ 045 public PipelineSink( List<Sink> pipeline ) 046 { 047 this.pipeline = pipeline; 048 } 049 050 /** 051 * Add a Sink to the List of Sinks. 052 * 053 * @param sink the Sink to add. 054 */ 055 public void addSink( Sink sink ) 056 { 057 pipeline.add( sink ); 058 } 059 060 /** 061 * {@inheritDoc} 062 * 063 * Invoke a Method on this PipelineSink. 064 * 065 * @throws IllegalAccessException if any. 066 * @throws InvocationTargetException if any. 067 */ 068 public Object invoke( Object proxy, Method method, Object[] args ) 069 throws IllegalAccessException, InvocationTargetException 070 { 071 for ( Sink sink : pipeline ) 072 { 073 method.invoke( sink, args ); 074 } 075 076 return null; 077 } 078 079 /** 080 * Returns an instance of a PipelineSink as a Sink. 081 * 082 * @param pipeline A List of Sinks. 083 * @return a {@link org.apache.maven.doxia.sink.Sink} object. 084 */ 085 public static Sink newInstance( List<Sink> pipeline ) 086 { 087 return (Sink) Proxy.newProxyInstance( PipelineSink.class.getClassLoader(), 088 new Class<?>[]{Sink.class}, 089 new PipelineSink( pipeline ) ); 090 } 091}