/*
* 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.synapse.Mediator;
import org.apache.synapse.SynapseException;
import org.apache.synapse.mediators.ext.AnnotatedCommandMediator;
import org.apache.synapse.util.xpath.SynapseXPath;
import org.jaxen.JaxenException;
import javax.xml.namespace.QName;
import java.util.Iterator;
import java.util.Properties;
/**
* Creates an instance of a AnnotatedCommand mediator using XML configuration specified
* <p/>
* <pre>
* <annotatedCommand name="class-name">
* <property name="string" value="literal">
* either literal or XML child
* </property>
* <property name="string" expression="XPATH expression"/>
* </annoatedCommand>
* </pre>
*/
public class AnnotatedCommandMediatorFactory extends AbstractMediatorFactory {
private static final QName ANNOTATED_COMMAND_Q =
new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "annotatedCommand");
protected Mediator createSpecificMediator(OMElement elem, Properties properties) {
AnnotatedCommandMediator pojoMediator = new AnnotatedCommandMediator();
// Class name of the Command object should be present
OMAttribute name = elem.getAttribute(ATT_NAME);
if (name == null) {
String msg = "The name of the actual POJO command implementation class" +
" is a required attribute";
log.error(msg);
throw new SynapseException(msg);
}
// load the class for the command object
try {
pojoMediator.setCommand(
getClass().getClassLoader().loadClass(name.getAttributeValue()));
} catch (ClassNotFoundException e) {
handleException("Unable to load the class specified as the command "
+ name.getAttributeValue(), e);
}
// setting the properties to the command. these properties will be instantiated
// at the mediation time
for (Iterator it = elem.getChildElements(); it.hasNext();) {
OMElement child = (OMElement) it.next();
if("property".equals(child.getLocalName())) {
String propName = child.getAttribute(ATT_NAME).getAttributeValue();
if (propName == null) {
handleException(
"A POJO command mediator property must specify the name attribute");
} else {
if (child.getAttribute(ATT_EXPRN) != null) {
SynapseXPath xpath;
try {
xpath = SynapseXPathFactory.getSynapseXPath(child, ATT_EXPRN);
pojoMediator.addMessageSetterProperty(propName, xpath);
} catch (JaxenException e) {
handleException("Error instantiating XPath expression : " +
child.getAttribute(ATT_EXPRN), e);
}
} else {
if (child.getAttribute(ATT_VALUE) != null) {
pojoMediator.addStaticSetterProperty(propName,
child.getAttribute(ATT_VALUE).getAttributeValue());
} else {
handleException("A POJO mediator property must specify either " +
"name and expression attributes, or name and value attributes");
}
}
}
}
}
return pojoMediator;
}
public QName getTagQName() {
return ANNOTATED_COMMAND_Q;
}
}