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.Expression; 021 import org.apache.camel.Processor; 022 import org.apache.commons.logging.Log; 023 import org.apache.commons.logging.LogFactory; 024 025 /** 026 * A processor which sets the body on the OUT message with an expression 027 */ 028 public class TransformProcessor extends DelegateProcessor implements Processor { 029 private static final transient Log LOG = LogFactory.getLog(TransformProcessor.class); 030 private Expression expression; 031 032 public TransformProcessor(Expression expression) { 033 this.expression = expression; 034 } 035 036 public TransformProcessor(Expression expression, Processor childProcessor) { 037 super(childProcessor); 038 this.expression = expression; 039 } 040 041 public void process(Exchange exchange) throws Exception { 042 Object newBody = expression.evaluate(exchange); 043 exchange.getOut().setBody(newBody); 044 045 // propagate headers 046 exchange.getOut().getHeaders().putAll(exchange.getIn().getHeaders()); 047 048 super.process(exchange); 049 } 050 051 @Override 052 public String toString() { 053 return "transform(" + expression + ")"; 054 } 055 }