/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.processor.aggregate;
import java.util.List;
import org.apache.camel.Exchange;
/**
* Aggregate all exchanges into a single combined Exchange holding all the aggregated exchanges
* in a {@link java.util.List<Exchange>} as the message body.
*
* @version
*/
public class GroupedExchangeAggregationStrategy extends AbstractListAggregationStrategy<Exchange> {
@Override
@SuppressWarnings("unchecked")
public void onCompletion(Exchange exchange) {
if (isStoreAsBodyOnCompletion()) {
// lets be backwards compatible
// TODO: Remove this method in Camel 3.0
List list = (List) exchange.getProperty(Exchange.GROUPED_EXCHANGE);
if (list != null) {
exchange.getIn().setBody(list);
}
}
}
@Override
public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
Exchange answer = super.aggregate(oldExchange, newExchange);
if (oldExchange == null) {
// for the first time we must do a copy as the answer, so the outgoing
// exchange is not one of the grouped exchanges, as that causes a endless circular reference
answer = answer.copy();
}
return answer;
}
@Override
public Exchange getValue(Exchange exchange) {
return exchange;
}
}