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.builder.ProcessorBuilder;
028    import org.apache.camel.model.language.ExpressionDefinition;
029    import org.apache.camel.spi.Required;
030    import org.apache.camel.spi.RouteContext;
031    import org.apache.camel.util.ObjectHelper;
032    
033    /**
034     * Represents an XML <setHeader/> element
035     */
036    @XmlRootElement(name = "setHeader")
037    @XmlAccessorType(XmlAccessType.FIELD)
038    public class SetHeaderDefinition extends NoOutputExpressionNode {
039        @XmlAttribute(required = true)
040        private String headerName;
041        
042        public SetHeaderDefinition() {
043        }
044    
045        public SetHeaderDefinition(String headerName, ExpressionDefinition expression) {
046            super(expression);
047            setHeaderName(headerName);
048        }
049    
050        public SetHeaderDefinition(String headerName, Expression expression) {
051            super(expression);
052            setHeaderName(headerName);        
053        }
054    
055        public SetHeaderDefinition(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 String getLabel() {
072            return "setHeader[" + getHeaderName() + "]";
073        }
074    
075        @Override
076        public Processor createProcessor(RouteContext routeContext) throws Exception {
077            ObjectHelper.notNull(headerName, "headerName");
078            Expression expr = getExpression().createExpression(routeContext);
079            return ProcessorBuilder.setHeader(getHeaderName(), expr);
080        }
081    
082        @Required
083        public void setHeaderName(String headerName) {
084            this.headerName = headerName;
085        }
086    
087        public String getHeaderName() {
088            return headerName;
089        }
090        
091    }