/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.model;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlRootElement;
import org.apache.camel.Expression;
import org.apache.camel.Processor;
import org.apache.camel.builder.ExpressionBuilder;
import org.apache.camel.model.language.ExpressionDefinition;
import org.apache.camel.processor.SetHeaderProcessor;
import org.apache.camel.spi.Metadata;
import org.apache.camel.spi.RouteContext;
import org.apache.camel.util.ObjectHelper;
/**
* Sets the value of a message header
*/
@Metadata(label = "eip,transformation")
@XmlRootElement(name = "setHeader")
@XmlAccessorType(XmlAccessType.FIELD)
public class SetHeaderDefinition extends NoOutputExpressionNode {
@XmlAttribute(required = true)
private String headerName;
public SetHeaderDefinition() {
}
public SetHeaderDefinition(String headerName, ExpressionDefinition expression) {
super(expression);
setHeaderName(headerName);
}
public SetHeaderDefinition(String headerName, Expression expression) {
super(expression);
setHeaderName(headerName);
}
public SetHeaderDefinition(String headerName, String value) {
super(ExpressionBuilder.constantExpression(value));
setHeaderName(headerName);
}
@Override
public String toString() {
return "SetHeader[" + getHeaderName() + ", " + getExpression() + "]";
}
@Override
public String getLabel() {
return "setHeader[" + getHeaderName() + "]";
}
@Override
public Processor createProcessor(RouteContext routeContext) throws Exception {
ObjectHelper.notNull(headerName, "headerName");
Expression expr = getExpression().createExpression(routeContext);
Expression nameExpr = ExpressionBuilder.parseSimpleOrFallbackToConstantExpression(getHeaderName(), routeContext.getCamelContext());
return new SetHeaderProcessor(nameExpr, expr);
}
/**
* Expression to return the value of the header
*/
@Override
public void setExpression(ExpressionDefinition expression) {
// override to include javadoc what the expression is used for
super.setExpression(expression);
}
/**
* Name of message header to set a new value
* <p/>
* The <tt>simple</tt> language can be used to define a dynamic evaluated header name to be used.
* Otherwise a constant name will be used.
*/
public void setHeaderName(String headerName) {
this.headerName = headerName;
}
public String getHeaderName() {
return headerName;
}
}