001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.camel.processor; 018 019 import java.util.ArrayList; 020 import java.util.Collection; 021 import java.util.List; 022 023 import org.apache.camel.Exchange; 024 import org.apache.camel.Navigate; 025 import org.apache.camel.Processor; 026 import org.apache.camel.impl.ServiceSupport; 027 import org.apache.camel.util.ServiceHelper; 028 029 /** 030 * Represents a composite pattern, aggregating a collection of processors 031 * together as a single processor 032 * 033 * @version $Revision: 769303 $ 034 */ 035 public class CompositeProcessor extends ServiceSupport implements Processor, Navigate<Processor> { 036 private final Collection<Processor> processors; 037 038 public CompositeProcessor(Collection<Processor> processors) { 039 this.processors = processors; 040 } 041 042 public void process(Exchange exchange) throws Exception { 043 for (Processor processor : processors) { 044 processor.process(exchange); 045 } 046 } 047 048 @Override 049 public String toString() { 050 StringBuilder builder = new StringBuilder("[ "); 051 boolean first = true; 052 for (Processor processor : processors) { 053 if (first) { 054 first = false; 055 } else { 056 builder.append(", "); 057 } 058 builder.append(processor.toString()); 059 } 060 builder.append(" ]"); 061 return builder.toString(); 062 } 063 064 public Collection<Processor> getProcessors() { 065 return processors; 066 } 067 068 public List<Processor> next() { 069 if (!hasNext()) { 070 return null; 071 } 072 return new ArrayList<Processor>(processors); 073 } 074 075 public boolean hasNext() { 076 return processors != null && !processors.isEmpty(); 077 } 078 079 protected void doStart() throws Exception { 080 ServiceHelper.startServices(processors); 081 } 082 083 protected void doStop() throws Exception { 084 ServiceHelper.stopServices(processors); 085 } 086 }