1 /*
2 * Copyright 2008 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.openehealth.ipf.platform.camel.core.closures;
17
18 import groovy.lang.Closure;
19
20 import groovy.transform.stc.ClosureParams;
21 import groovy.transform.stc.SimpleType;
22 import org.apache.camel.Exchange;
23 import org.apache.camel.processor.aggregate.AggregationStrategy;
24
25 /**
26 * An aggregation strategy that delegates to a {@link Closure}.
27 *
28 * @author Martin Krasser
29 *
30 */
31 public class DelegatingAggregationStrategy extends ClosureAdapter implements AggregationStrategy {
32
33 public DelegatingAggregationStrategy(@ClosureParams(value = SimpleType.class, options = { "org.apache.camel.Exchange", "org.apache.camel.Exchange"})
34 Closure closure) {
35 super(closure);
36 }
37
38 @Override
39 public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
40 Object result = call(oldExchange, newExchange);
41 if (result instanceof Exchange) {
42 return (Exchange)result;
43 } else {
44 return oldExchange;
45 }
46 }
47
48 }