001 /** 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.camel.processor; 019 020 import org.apache.camel.Exchange; 021 import org.apache.camel.Expression; 022 import org.apache.camel.Processor; 023 import org.apache.camel.converter.ObjectConverter; 024 import org.apache.camel.impl.ServiceSupport; 025 import static org.apache.camel.util.ObjectHelper.notNull; 026 import org.apache.camel.util.ServiceHelper; 027 028 import java.util.Iterator; 029 030 /** 031 * Implements a dynamic <a href="http://activemq.apache.org/camel/splitter.html">Splitter</a> pattern 032 * where an expression is evaluated to iterate through each of the parts of a message and then each part is then send to some endpoint. 033 * 034 * @version $Revision: 534145 $ 035 */ 036 public class Splitter extends ServiceSupport implements Processor { 037 private final Processor processor; 038 private final Expression expression; 039 040 public Splitter(Processor destination, Expression expression) { 041 this.processor = destination; 042 this.expression = expression; 043 notNull(destination, "destination"); 044 notNull(expression, "expression"); 045 } 046 047 @Override 048 public String toString() { 049 return "Splitter[on: " + expression + " to: " + processor + "]"; 050 } 051 052 public void process(Exchange exchange) throws Exception { 053 Object value = expression.evaluate(exchange); 054 Iterator iter = ObjectConverter.iterator(value); 055 while (iter.hasNext()) { 056 Object part = iter.next(); 057 Exchange newExchange = exchange.copy(); 058 newExchange.getIn().setBody(part); 059 processor.process(newExchange); 060 } 061 } 062 063 protected void doStart() throws Exception { 064 ServiceHelper.startServices(processor); 065 } 066 067 protected void doStop() throws Exception { 068 ServiceHelper.stopServices(processor); 069 } 070 }