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.aggregate;
018
019 import java.util.ArrayList;
020 import java.util.List;
021
022 import org.apache.camel.Exchange;
023 import org.apache.camel.impl.DefaultExchange;
024
025 /**
026 * Aggregate all exchanges into a single combined Exchange holding all the aggregated exchanges
027 * in a {@link java.util.List} as a exchange property with the key
028 * {@link org.apache.camel.Exchange#GROUPED_EXCHANGE}.
029 *
030 * @version $Revision: 791088 $
031 */
032 public class GroupedExchangeAggregationStrategy implements AggregationStrategy {
033
034 @SuppressWarnings("unchecked")
035 public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
036 List<Exchange> list;
037 Exchange answer = oldExchange;
038
039 if (oldExchange == null) {
040 answer = new DefaultExchange(newExchange);
041 list = new ArrayList<Exchange>();
042 answer.setProperty(Exchange.GROUPED_EXCHANGE, list);
043 } else {
044 list = oldExchange.getProperty(Exchange.GROUPED_EXCHANGE, List.class);
045 }
046
047 list.add(newExchange);
048 return answer;
049 }
050
051 }
052