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 Processor createProcessor(RouteContext routeContext) throws Exception {
067            Expression expr;
068    
069            if (getValue() == null) {
070                expr = getExpression().createExpression(routeContext);
071            } else {
072                expr = ExpressionBuilder.constantExpression(getValue());
073            }
074    
075            Processor childProcessor = routeContext.createProcessor(this);
076            
077            return new SetHeaderProcessor(getHeaderName(), expr, childProcessor);
078        }
079    
080        public void setHeaderName(String headerName) {
081            this.headerName = headerName;
082        }
083    
084        public String getHeaderName() {
085            return headerName;
086        }
087    
088        public void setValue(String value) {
089            this.value = value;
090        }
091    
092        public String getValue() {
093            return value;
094        }
095    }