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.Collection;
020    
021    import org.apache.camel.Exchange;
022    import org.apache.camel.Processor;
023    import org.apache.camel.impl.ServiceSupport;
024    import org.apache.camel.util.ServiceHelper;
025    
026    /**
027     * Represents a composite pattern, aggregating a collection of processors
028     * together as a single processor
029     * 
030     * @version $Revision: 35332 $
031     */
032    public class CompositeProcessor extends ServiceSupport implements Processor {
033        private final Collection<Processor> processors;
034    
035        public CompositeProcessor(Collection<Processor> processors) {
036            this.processors = processors;
037        }
038    
039        public void process(Exchange exchange) throws Exception {
040            for (Processor processor : processors) {
041                processor.process(exchange);
042            }
043        }
044    
045        @Override
046        public String toString() {
047            StringBuilder builder = new StringBuilder("[ ");
048            boolean first = true;
049            for (Processor processor : processors) {
050                if (first) {
051                    first = false;
052                } else {
053                    builder.append(", ");
054                }
055                builder.append(processor.toString());
056            }
057            builder.append(" ]");
058            return builder.toString();
059        }
060    
061        public Collection<Processor> getProcessors() {
062            return processors;
063        }
064    
065        protected void doStart() throws Exception {
066            ServiceHelper.startServices(processors);
067        }
068    
069        protected void doStop() throws Exception {
070            ServiceHelper.stopServices(processors);
071        }
072    }