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.Iterator;
020
021 import org.apache.camel.Exchange;
022 import org.apache.camel.Expression;
023 import org.apache.camel.Processor;
024 import org.apache.camel.converter.ObjectConverter;
025 import org.apache.camel.impl.ServiceSupport;
026 import org.apache.camel.util.ServiceHelper;
027
028 import static org.apache.camel.util.ObjectHelper.notNull;
029
030 /**
031 * Implements a dynamic <a
032 * href="http://activemq.apache.org/camel/splitter.html">Splitter</a> pattern
033 * where an expression is evaluated to iterate through each of the parts of a
034 * message and then each part is then send to some endpoint.
035 *
036 * @version $Revision: 563607 $
037 */
038 public class Splitter extends ServiceSupport implements Processor {
039 private final Processor processor;
040 private final Expression expression;
041
042 public Splitter(Expression expression, Processor destination) {
043 this.processor = destination;
044 this.expression = expression;
045 notNull(destination, "destination");
046 notNull(expression, "expression");
047 }
048
049 @Override
050 public String toString() {
051 return "Splitter[on: " + expression + " to: " + processor + "]";
052 }
053
054 public void process(Exchange exchange) throws Exception {
055 Object value = expression.evaluate(exchange);
056 Iterator iter = ObjectConverter.iterator(value);
057 while (iter.hasNext()) {
058 Object part = iter.next();
059 Exchange newExchange = exchange.copy();
060 newExchange.getIn().setBody(part);
061 processor.process(newExchange);
062 }
063 }
064
065 protected void doStart() throws Exception {
066 ServiceHelper.startServices(processor);
067 }
068
069 protected void doStop() throws Exception {
070 ServiceHelper.stopServices(processor);
071 }
072 }