/*
* 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.tuscany.sca.binding.rmi.xml;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import java.util.List;
import java.util.StringTokenizer;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.xml.Constants;
import org.apache.tuscany.sca.binding.rmi.RMIBinding;
import org.apache.tuscany.sca.binding.rmi.RMIBindingConstants;
import org.apache.tuscany.sca.binding.rmi.RMIBindingFactory;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.contribution.service.ContributionReadException;
import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
import org.apache.tuscany.sca.policy.Intent;
import org.apache.tuscany.sca.policy.PolicyFactory;
import org.apache.tuscany.sca.policy.PolicySet;
import org.apache.tuscany.sca.policy.PolicySetAttachPoint;
public class RMIBindingProcessor implements
StAXArtifactProcessor<RMIBinding>, RMIBindingConstants {
private RMIBindingFactory rmiBindingFactory;
private PolicyFactory policyFactory;
public RMIBindingProcessor(AssemblyFactory assemblyFactory,
PolicyFactory policyFactory,
RMIBindingFactory rmiBindingFactory) {
this.policyFactory = policyFactory;
this.rmiBindingFactory = rmiBindingFactory;
}
public RMIBinding read(XMLStreamReader reader) throws ContributionReadException {
try {
RMIBinding rmiBinding = rmiBindingFactory.createRMIBinding();
//Read policies
readPolicies(rmiBinding, reader);
//Read host, port and service name
rmiBinding.setRmiHostName(reader.getAttributeValue(null, RMI_HOST));
rmiBinding.setRmiPort(reader.getAttributeValue(null, RMI_PORT));
rmiBinding.setRmiServiceName(reader.getAttributeValue(null, RMI_SERVICE));
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && BINDING_RMI_QNAME.equals(reader.getName())) {
break;
}
}
return rmiBinding;
} catch (XMLStreamException e) {
throw new ContributionReadException(e);
}
}
public void write(RMIBinding rmiBinding, XMLStreamWriter writer) throws ContributionWriteException {
try {
// Write a <binding.ws>
writer.writeStartElement(Constants.SCA10_NS, BINDING_RMI);
if (rmiBinding.getRmiHostName() != null) {
writer.writeAttribute(RMIBindingConstants.RMI_HOST, rmiBinding.getRmiHostName());
}
if (rmiBinding.getRmiPort() != null) {
writer.writeAttribute(RMIBindingConstants.RMI_PORT, rmiBinding.getRmiPort());
}
if (rmiBinding.getRmiServiceName() != null) {
writer.writeAttribute(RMIBindingConstants.RMI_SERVICE, rmiBinding.getRmiServiceName());
}
writer.writeEndElement();
} catch (XMLStreamException e) {
throw new ContributionWriteException(e);
}
}
public void resolve(RMIBinding model, ModelResolver resolver) throws ContributionResolveException {
}
public QName getArtifactType() {
return RMIBindingConstants.BINDING_RMI_QNAME;
}
public Class<RMIBinding> getModelType() {
return RMIBinding.class;
}
/**
* Reads policy intents and policy sets.
* @param attachPoint
* @param reader
*/
private void readPolicies(PolicySetAttachPoint attachPoint, XMLStreamReader reader) {
String value = reader.getAttributeValue(null, Constants.REQUIRES);
if (value != null) {
List<Intent> requiredIntents = attachPoint.getRequiredIntents();
for (StringTokenizer tokens = new StringTokenizer(value); tokens.hasMoreTokens();) {
QName qname = getQNameValue(reader, tokens.nextToken());
Intent intent = policyFactory.createIntent();
intent.setName(qname);
requiredIntents.add(intent);
}
}
value = reader.getAttributeValue(null, Constants.POLICY_SETS);
if (value != null) {
List<PolicySet> policySets = attachPoint.getPolicySets();
for (StringTokenizer tokens = new StringTokenizer(value); tokens.hasMoreTokens();) {
QName qname = getQNameValue(reader, tokens.nextToken());
PolicySet policySet = policyFactory.createPolicySet();
policySet.setName(qname);
policySets.add(policySet);
}
}
}
/**
* Returns a qname from a string.
* @param reader
* @param value
* @return
*/
private QName getQNameValue(XMLStreamReader reader, String value) {
if (value != null) {
int index = value.indexOf(':');
String prefix = index == -1 ? "" : value.substring(0, index);
String localName = index == -1 ? value : value.substring(index + 1);
String ns = reader.getNamespaceContext().getNamespaceURI(prefix);
if (ns == null) {
ns = "";
}
return new QName(ns, localName, prefix);
} else {
return null;
}
}
}