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.builder.ExpressionBuilder;
026import org.apache.camel.model.language.ExpressionDefinition;
027import org.apache.camel.spi.Metadata;
028
029/**
030 * Sets the value of a message header
031 */
032@Metadata(label = "eip,transformation")
033@XmlRootElement(name = "setHeader")
034@XmlAccessorType(XmlAccessType.FIELD)
035public class SetHeaderDefinition extends ExpressionNode {
036    @XmlAttribute(required = true)
037    private String name;
038
039    public SetHeaderDefinition() {
040    }
041
042    public SetHeaderDefinition(String name, ExpressionDefinition expression) {
043        super(expression);
044        setName(name);
045    }
046
047    public SetHeaderDefinition(String name, Expression expression) {
048        super(expression);
049        setName(name);
050    }
051
052    public SetHeaderDefinition(String name, String value) {
053        super(ExpressionBuilder.constantExpression(value));
054        setName(name);
055    }
056
057    @Override
058    public String toString() {
059        return "SetHeader[" + getName() + ", " + getExpression() + "]";
060    }
061
062    @Override
063    public String getShortName() {
064        return "setHeader";
065    }
066
067    @Override
068    public String getLabel() {
069        return "setHeader[" + getName() + "]";
070    }
071
072    /**
073     * Expression to return the value of the header
074     */
075    @Override
076    public void setExpression(ExpressionDefinition expression) {
077        // override to include javadoc what the expression is used for
078        super.setExpression(expression);
079    }
080
081    /**
082     * Name of message header to set a new value
083     * <p/>
084     * The <tt>simple</tt> language can be used to define a dynamic evaluated
085     * header name to be used. Otherwise a constant name will be used.
086     */
087    public void setName(String name) {
088        this.name = name;
089    }
090
091    public String getName() {
092        return name;
093    }
094
095}