/*
* 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.OMNode;
import org.apache.synapse.Mediator;
import org.apache.synapse.SynapseException;
import org.apache.synapse.commons.util.PropertyHelper;
import org.apache.synapse.mediators.ext.ClassMediator;
import javax.xml.namespace.QName;
import java.util.Iterator;
import java.util.Properties;
/**
* Creates an instance of a Class mediator using XML configuration specified
* <p/>
* <pre>
* <class name="class-name">
* <property name="string" value="literal">
* either literal or XML child
* </property>
* </class>
* </pre>
*/
public class ClassMediatorFactory extends AbstractMediatorFactory {
private static final QName CLASS_Q = new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "class");
protected Mediator createSpecificMediator(OMElement elem, Properties properties) {
ClassMediator classMediator = new ClassMediator();
OMAttribute name = elem.getAttribute(ATT_NAME);
if (name == null) {
String msg = "The name of the actual mediator class is a required attribute";
log.error(msg);
throw new SynapseException(msg);
}
Class clazz = null;
Mediator m = null;
try {
clazz = getClass().getClassLoader().loadClass(
name.getAttributeValue());
m = (Mediator) clazz.newInstance();
} catch (Exception e) {
String msg = "Error : " + name.getAttributeValue();
log.error(msg, e);
throw new SynapseException(msg, e);
}
for (Iterator it = elem.getChildrenWithName(PROP_Q); it.hasNext();) {
OMElement child = (OMElement) it.next();
String propName = child.getAttribute(ATT_NAME).getAttributeValue();
if (propName == null) {
handleException(
"A Class mediator property must specify the name attribute");
} else {
if (child.getAttribute(ATT_VALUE) != null) {
String value = child.getAttribute(ATT_VALUE).getAttributeValue();
classMediator.addProperty(propName, value);
PropertyHelper.setInstanceProperty(propName, value, m);
} else {
OMNode omElt = child.getFirstElement();
if (omElt != null) {
classMediator.addProperty(propName, omElt);
PropertyHelper.setInstanceProperty(propName, omElt, m);
} else {
handleException("A Class mediator property must specify " +
"name and value attributes, or a name and a child XML fragment");
}
}
}
}
// after successfully creating the mediator
// set its common attributes such as tracing etc
classMediator.setMediator(m);
processAuditStatus(classMediator, elem);
return classMediator;
}
public QName getTagQName() {
return CLASS_Q;
}
}