/*
* 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.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.SynapseException;
import org.apache.synapse.registry.Registry;
import javax.xml.namespace.QName;
import java.util.Iterator;
import java.util.Properties;
/**
* Create an instance of the given registry, and sets properties on it.
*
* <registry [name="string"] provider="provider.class">
* <property name="string" value="string">
* </registry>
*/
public class RegistryFactory {
private static final Log log = LogFactory.getLog(RegistryFactory.class);
public static final QName PROVIDER_Q
= new QName(XMLConfigConstants.NULL_NAMESPACE, "provider");
public static final QName PARAMETER_Q
= new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "parameter");
public static final QName NAME_Q
= new QName(XMLConfigConstants.NULL_NAMESPACE, "name");
public static Registry createRegistry(OMElement elem, Properties properties) {
OMAttribute prov = elem.getAttribute(PROVIDER_Q);
if (prov != null) {
try {
Class provider = Class.forName(prov.getAttributeValue());
Registry registry = (Registry) provider.newInstance();
registry.init(getProperties(elem, properties));
return registry;
} catch (ClassNotFoundException e) {
handleException("Cannot locate registry provider class : " +
prov.getAttributeValue(), e);
} catch (IllegalAccessException e) {
handleException("Error instantiating registry provider : " +
prov.getAttributeValue(), e);
} catch (InstantiationException e) {
handleException("Error instantiating registry provider : " +
prov.getAttributeValue(), e);
}
} else {
handleException("The registry 'provider' " +
"attribute is required for a registry definition");
}
return null;
}
private static Properties getProperties(OMElement elem, Properties topLevelProps) {
Iterator params = elem.getChildrenWithName(PARAMETER_Q);
Properties props = new Properties(topLevelProps);
while (params.hasNext()) {
Object o = params.next();
if (o instanceof OMElement) {
OMElement prop = (OMElement) o;
OMAttribute pname = prop.getAttribute(NAME_Q);
String propertyValue = prop.getText();
if (pname != null) {
if (propertyValue != null) {
props.setProperty(pname.getAttributeValue(), propertyValue.trim());
}
} else {
handleException("Invalid registry property - property should have a name ");
}
} else {
handleException("Invalid registry property");
}
}
return props;
}
private static void handleException(String msg) {
log.error(msg);
throw new SynapseException(msg);
}
private static void handleException(String msg, Exception e) {
log.error(msg, e);
throw new SynapseException(msg, e);
}
}