/*
* 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.synapse.config.xml;
import org.apache.axiom.om.OMAttribute;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.xpath.AXIOMXPath;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.SynapseException;
import org.apache.synapse.Mediator;
import org.apache.synapse.mediators.builtin.PropertyMediator;
import org.jaxen.JaxenException;
import javax.xml.namespace.QName;
/**
* Creates a set-property mediator through the supplied XML configuration
*
* <pre>
* <set-property name="string" (value="literal" | expression="xpath")/>
* </pre>
*/
public class PropertyMediatorFactory implements MediatorFactory {
private static final Log log = LogFactory.getLog(LogMediatorFactory.class);
private static final QName PROP_Q = new QName(Constants.SYNAPSE_NAMESPACE, "set-property");
public Mediator createMediator(OMElement elem) {
PropertyMediator propMediator = new PropertyMediator();
OMAttribute name = elem.getAttribute(new QName(Constants.NULL_NAMESPACE, "name"));
OMAttribute value = elem.getAttribute(new QName(Constants.NULL_NAMESPACE, "value"));
OMAttribute expression = elem.getAttribute(new QName(Constants.NULL_NAMESPACE, "expression"));
if (name == null) {
String msg = "The 'name' attribute is required for the configuration of a property mediator";
log.error(msg);
throw new SynapseException(msg);
} else if (value == null && expression == null) {
String msg = "Either an 'value' or 'expression' attribute is required for a property mediator";
log.error(msg);
throw new SynapseException(msg);
}
propMediator.setName(name.getAttributeValue());
if (value != null) {
propMediator.setValue(value.getAttributeValue());
} else {
try {
AXIOMXPath xp = new AXIOMXPath(expression.getAttributeValue());
OMElementUtils.addNameSpaces(xp, elem, log);
propMediator.setExpression(xp);
} catch (JaxenException e) {
String msg = "Invalid XPath expression for attribute 'expression' : " + expression.getAttributeValue();
log.error(msg);
throw new SynapseException(msg);
}
}
return propMediator;
}
public QName getTagQName() {
return PROP_Q;
}
}