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 }