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 */
017package org.apache.camel.model;
018
019import javax.xml.bind.annotation.XmlAccessType;
020import javax.xml.bind.annotation.XmlAccessorType;
021import javax.xml.bind.annotation.XmlRootElement;
022
023import org.apache.camel.Expression;
024import org.apache.camel.Processor;
025import org.apache.camel.model.language.ExpressionDefinition;
026import org.apache.camel.processor.TransformProcessor;
027import org.apache.camel.spi.Metadata;
028import org.apache.camel.spi.RouteContext;
029
030/**
031 * Transforms the message body based on an expression
032 */
033@Metadata(label = "eip,transformation")
034@XmlRootElement(name = "transform")
035@XmlAccessorType(XmlAccessType.FIELD)
036public class TransformDefinition extends NoOutputExpressionNode {
037
038    public TransformDefinition() {
039    }
040
041    public TransformDefinition(Expression expression) {
042        super(expression);
043    }
044
045    @Override
046    public String toString() {
047        return "Transform[" + getExpression() + "]";
048    }
049
050    @Override
051    public String getLabel() {
052        return "transform[" + getExpression() + "]";
053    }
054
055    @Override
056    public Processor createProcessor(RouteContext routeContext) throws Exception {
057        Expression expr = getExpression().createExpression(routeContext);
058        return new TransformProcessor(expr);
059    }
060
061    /**
062     * Expression to return the transformed message body (the new message body to use)
063     */
064    @Override
065    public void setExpression(ExpressionDefinition expression) {
066        // override to include javadoc what the expression is used for
067        super.setExpression(expression);
068    }
069
070}