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.Message; 022 import org.apache.camel.Processor; 023 import org.apache.camel.Traceable; 024 import org.apache.camel.impl.DefaultMessage; 025 import org.apache.camel.support.ServiceSupport; 026 027 /** 028 * A processor which sets the body on the IN message with an {@link Expression} 029 */ 030 public class SetBodyProcessor extends ServiceSupport implements Processor, Traceable { 031 private final Expression expression; 032 033 public SetBodyProcessor(Expression expression) { 034 this.expression = expression; 035 } 036 037 public void process(Exchange exchange) throws Exception { 038 Object newBody = expression.evaluate(exchange, Object.class); 039 040 Message old = exchange.getIn(); 041 042 // create a new message container so we do not drag specialized message objects along 043 Message msg = new DefaultMessage(); 044 msg.copyFrom(old); 045 msg.setBody(newBody); 046 exchange.setIn(msg); 047 } 048 049 @Override 050 public String toString() { 051 return "SetBody(" + expression + ")"; 052 } 053 054 public String getTraceLabel() { 055 return "setBody[" + expression + "]"; 056 } 057 058 @Override 059 protected void doStart() throws Exception { 060 // noop 061 } 062 063 @Override 064 protected void doStop() throws Exception { 065 // noop 066 } 067 }