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.Predicate;
021    import org.apache.camel.Processor;
022    import org.apache.camel.Exchange;
023    import org.apache.camel.impl.ServiceSupport;
024    import org.apache.camel.util.ServiceHelper;
025    
026    /**
027     * @version $Revision: 534941 $
028     */
029    public class FilterProcessor extends ServiceSupport implements Processor {
030        private Predicate<Exchange> predicate;
031        private Processor processor;
032    
033        public FilterProcessor(Predicate<Exchange> predicate, Processor processor) {
034            this.predicate = predicate;
035            this.processor = processor;
036        }
037    
038        public void process(Exchange exchange) throws Exception {
039            if (predicate.matches(exchange)) {
040                processor.process(exchange);
041            }
042        }
043    
044        @Override
045        public String toString() {
046            return "filter (" + predicate + ") " + processor;
047        }
048    
049        public Predicate<Exchange> getPredicate() {
050            return predicate;
051        }
052    
053        public Processor getProcessor() {
054            return processor;
055        }
056    
057        protected void doStart() throws Exception {
058            ServiceHelper.startServices(processor);
059        }
060    
061        protected void doStop() throws Exception {
062            ServiceHelper.stopServices(processor);
063        }
064    }