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 and attachments
046 exchange.getOut().getHeaders().putAll(exchange.getIn().getHeaders());
047 exchange.getOut().setAttachments(exchange.getIn().getAttachments());
048
049 super.process(exchange);
050 }
051
052 @Override
053 public String toString() {
054 return "transform(" + expression + "," + processor + ")";
055 }
056 }