001    /**
002     *
003     * Licensed to the Apache Software Foundation (ASF) under one or more
004     * contributor license agreements.  See the NOTICE file distributed with
005     * this work for additional information regarding copyright ownership.
006     * The ASF licenses this file to You under the Apache License, Version 2.0
007     * (the "License"); you may not use this file except in compliance with
008     * the License.  You may obtain a copy of the License at
009     *
010     * http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    package org.apache.camel.processor;
019    
020    import org.apache.camel.Processor;
021    import org.apache.camel.Exchange;
022    import org.apache.camel.impl.ServiceSupport;
023    import org.apache.camel.util.ServiceHelper;
024    
025    import java.util.Collection;
026    
027    /**
028     * Represents a composite pattern, aggregating a collection of processors together as a single processor
029     *
030     * @version $Revision: 534145 $
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                }
053                else {
054                    builder.append(", ");
055                }
056                builder.append(processor.toString());
057            }
058            builder.append(" ]");
059            return builder.toString();
060        }
061    
062        public Collection<Processor> getProcessors() {
063            return processors;
064        }
065    
066        protected void doStart() throws Exception {
067            ServiceHelper.startServices(processors);
068        }
069    
070        protected void doStop() throws Exception {
071            ServiceHelper.stopServices(processors);
072        }
073    }