| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.processor; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Expression; |
| import org.apache.camel.Message; |
| import org.apache.camel.Processor; |
| import org.apache.camel.Traceable; |
| import org.apache.camel.impl.DefaultMessage; |
| import org.apache.camel.support.ServiceSupport; |
| import org.apache.camel.util.ObjectHelper; |
| |
| /** |
| * A processor which sets the body on the OUT message with an {@link Expression} |
| */ |
| public class TransformProcessor extends ServiceSupport implements Processor, Traceable { |
| private final Expression expression; |
| |
| public TransformProcessor(Expression expression) { |
| ObjectHelper.notNull(expression, "expression", this); |
| this.expression = expression; |
| } |
| |
| public void process(Exchange exchange) throws Exception { |
| Object newBody = expression.evaluate(exchange, Object.class); |
| |
| Message old = exchange.getIn(); |
| |
| // create a new message container so we do not drag specialized message objects along |
| Message msg = new DefaultMessage(); |
| msg.copyFrom(old); |
| msg.setBody(newBody); |
| exchange.setOut(msg); |
| } |
| |
| @Override |
| public String toString() { |
| return "Transform(" + expression + ")"; |
| } |
| |
| public String getTraceLabel() { |
| return "transform[" + expression + "]"; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| // noop |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| // noop |
| } |
| } |