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.validation;
018    
019    import org.apache.camel.Exchange;
020    import org.apache.camel.Predicate;
021    import org.apache.camel.Processor;
022    import org.apache.camel.Traceable;
023    import org.apache.camel.support.ServiceSupport;
024    import org.apache.camel.util.ObjectHelper;
025    import org.slf4j.Logger;
026    import org.slf4j.LoggerFactory;
027    
028    /**
029     * A processor which validates the content of the inbound message body against a {@link Predicate}.
030     * 
031     * @version 
032     */
033    public class PredicateValidatingProcessor extends ServiceSupport implements Processor, Traceable {
034        
035        private static final Logger LOG = LoggerFactory.getLogger(PredicateValidatingProcessor.class);
036    
037        private final Predicate predicate;
038        
039        public PredicateValidatingProcessor(Predicate predicate) {
040            ObjectHelper.notNull(predicate, "predicate", this);
041            this.predicate = predicate;
042        }
043    
044        public void process(Exchange exchange) throws Exception {
045            boolean matches = predicate.matches(exchange);
046    
047            if (LOG.isDebugEnabled()) {
048                LOG.debug("Validation {} for {} with Predicate[{}]", new Object[]{matches ? "succeed" : "failed", exchange, predicate});
049            }
050    
051            if (!matches) {
052                throw new PredicateValidationException(exchange, predicate);
053            }
054        }
055    
056        public Predicate getPredicate() {
057            return predicate;
058        }
059    
060        @Override
061        public String toString() {
062            return "validate(" + predicate + ")";
063        }
064    
065        public String getTraceLabel() {
066            return "validate[" + predicate + "]";
067        }
068    
069        @Override
070        protected void doStart() throws Exception {
071            // noop
072        }
073    
074        @Override
075        protected void doStop() throws Exception {
076            // noop
077        }
078    }