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.XmlAttribute;
022import javax.xml.bind.annotation.XmlRootElement;
023
024import org.apache.camel.Expression;
025import org.apache.camel.Processor;
026import org.apache.camel.builder.ExpressionBuilder;
027import org.apache.camel.model.language.ExpressionDefinition;
028import org.apache.camel.processor.SetPropertyProcessor;
029import org.apache.camel.spi.Metadata;
030import org.apache.camel.spi.RouteContext;
031import org.apache.camel.util.ObjectHelper;
032
033/**
034 * Sets a named property on the message exchange
035 */
036@Metadata(label = "eip,transformation")
037@XmlRootElement(name = "setProperty")
038@XmlAccessorType(XmlAccessType.FIELD)
039public class SetPropertyDefinition extends NoOutputExpressionNode {
040    @XmlAttribute(required = true)
041    private String propertyName;
042    
043    public SetPropertyDefinition() {
044    }
045
046    public SetPropertyDefinition(String propertyName, ExpressionDefinition expression) {
047        super(expression);
048        setPropertyName(propertyName);
049    }
050
051    public SetPropertyDefinition(String propertyName, Expression expression) {
052        super(expression);
053        setPropertyName(propertyName);        
054    }
055
056    public SetPropertyDefinition(String propertyName, String value) {
057        super(ExpressionBuilder.constantExpression(value));
058        setPropertyName(propertyName);        
059    }   
060    
061    @Override
062    public String toString() {
063        return "SetProperty[" + getPropertyName() + ", " + getExpression() + "]";
064    }
065    
066    @Override
067    public String getLabel() {
068        return "setProperty[" + getPropertyName() + "]";
069    }
070
071    @Override
072    public Processor createProcessor(RouteContext routeContext) throws Exception {
073        ObjectHelper.notNull(getPropertyName(), "propertyName", this);
074        Expression expr = getExpression().createExpression(routeContext);
075        Expression nameExpr = ExpressionBuilder.parseSimpleOrFallbackToConstantExpression(getPropertyName(), routeContext.getCamelContext());
076        return new SetPropertyProcessor(nameExpr, expr);
077    }
078
079    /**
080     * Expression to return the value of the message exchange property
081     */
082    @Override
083    public void setExpression(ExpressionDefinition expression) {
084        // override to include javadoc what the expression is used for
085        super.setExpression(expression);
086    }
087
088    /**
089     * Name of exchange property to set a new value.
090     * <p/>
091     * The <tt>simple</tt> language can be used to define a dynamic evaluated exchange property name to be used.
092     * Otherwise a constant name will be used.
093     */
094    public void setPropertyName(String propertyName) {
095        this.propertyName = propertyName;
096    }
097
098    public String getPropertyName() {
099        return propertyName;
100    }
101    
102}