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.model;
018    
019    import javax.xml.bind.annotation.XmlAccessType;
020    import javax.xml.bind.annotation.XmlAccessorType;
021    import javax.xml.bind.annotation.XmlAttribute;
022    import javax.xml.bind.annotation.XmlRootElement;
023    
024    import org.apache.camel.Expression;
025    import org.apache.camel.Processor;
026    import org.apache.camel.builder.ExpressionBuilder;
027    import org.apache.camel.model.language.ExpressionType;
028    import org.apache.camel.processor.SetHeaderProcessor;
029    import org.apache.camel.spi.RouteContext;
030    
031    /**
032     * Represents an XML <setHeader/> element
033     */
034    @XmlRootElement(name = "setHeader")
035    @XmlAccessorType(XmlAccessType.FIELD)
036    public class SetHeaderType extends ExpressionNode {
037        @XmlAttribute
038        private String headerName;
039        @XmlAttribute(required = false)
040        private String value;
041        
042        public SetHeaderType() {
043        }
044    
045        public SetHeaderType(String headerName, ExpressionType expression) {
046            super(expression);
047            setHeaderName(headerName);
048        }
049    
050        public SetHeaderType(String headerName, Expression expression) {
051            super(expression);
052            setHeaderName(headerName);        
053        }
054    
055        public SetHeaderType(String headerName, String value) {
056            super(ExpressionBuilder.constantExpression(value));
057            setHeaderName(headerName);        
058        }   
059        
060        @Override
061        public String toString() {
062            return "SetHeader[ " + getHeaderName() + ", " + getExpression() + "]";
063        }
064    
065        @Override
066        public String getShortName() {
067            return "setHeader";
068        }
069    
070        @Override
071        public Processor createProcessor(RouteContext routeContext) throws Exception {
072            Expression expr;
073    
074            if (getValue() == null) {
075                expr = getExpression().createExpression(routeContext);
076            } else {
077                expr = ExpressionBuilder.constantExpression(getValue());
078            }
079    
080            Processor childProcessor = routeContext.createProcessor(this);
081            
082            return new SetHeaderProcessor(getHeaderName(), expr, childProcessor);
083        }
084    
085        public void setHeaderName(String headerName) {
086            this.headerName = headerName;
087        }
088    
089        public String getHeaderName() {
090            return headerName;
091        }
092    
093        public void setValue(String value) {
094            this.value = value;
095        }
096    
097        public String getValue() {
098            return value;
099        }
100    }