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 }