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 org.apache.camel.Exchange;
020 import org.apache.camel.Predicate;
021 import org.apache.camel.Processor;
022 import org.apache.commons.logging.Log;
023 import org.apache.commons.logging.LogFactory;
024
025 /**
026 * The processor which implements the
027 * <a href="http://camel.apache.org/message-filter.html">Message Filter</a> EIP pattern.
028 *
029 * @version $Revision: 788621 $
030 */
031 public class FilterProcessor extends DelegateProcessor implements Traceable {
032 private static final Log LOG = LogFactory.getLog(FilterProcessor.class);
033 private final Predicate predicate;
034
035 public FilterProcessor(Predicate predicate, Processor processor) {
036 super(processor);
037 this.predicate = predicate;
038 }
039
040 public void process(Exchange exchange) throws Exception {
041 if (predicate.matches(exchange)) {
042 super.process(exchange);
043 } else {
044 if (LOG.isDebugEnabled()) {
045 LOG.debug("Marking exchange as filtered: " + exchange);
046 }
047 // mark this exchange as filtered
048 exchange.setProperty(Exchange.FILTERED, Boolean.TRUE);
049 }
050 }
051
052 @Override
053 public String toString() {
054 return "Filter[if: " + predicate + " do: " + getProcessor() + "]";
055 }
056
057 public String getTraceLabel() {
058 return "Filter[if: " + predicate + "]";
059 }
060
061 public Predicate getPredicate() {
062 return predicate;
063 }
064 }