/*
* 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.ejb.impl;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.assembly.Extension;
import org.apache.tuscany.sca.assembly.ExtensionFactory;
import org.apache.tuscany.sca.assembly.xml.Constants;
import org.apache.tuscany.sca.assembly.xml.PolicyAttachPointProcessor;
import org.apache.tuscany.sca.binding.ejb.EJBBinding;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
import org.apache.tuscany.sca.contribution.processor.ExtensibleStAXAttributeProcessor;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.StAXAttributeProcessor;
import org.apache.tuscany.sca.contribution.processor.StAXAttributeProcessorExtensionPoint;
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.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.UtilityExtensionPoint;
import org.apache.tuscany.sca.policy.PolicyFactory;
import org.apache.tuscany.sca.monitor.Monitor;
import org.apache.tuscany.sca.monitor.MonitorFactory;
import org.apache.tuscany.sca.monitor.Problem;
import org.apache.tuscany.sca.monitor.Problem.Severity;
import org.apache.tuscany.sca.monitor.impl.ProblemImpl;
/**
* A processor to read the XML that describes the EJB binding...
*
* <binding.ejb
* homeInterface="NCName"?
* ejb-link-name="NCName"?
* session-type="stateful or stateless"?
* ejb-version="EJB2 or EJB3"?
* name="NCName"?
* policySets=" sca:listOfQNames"?
* requires="sca:listOfQNames"?
* uri="anyURI"?
* >
*
* <!-- additional elements here -->
*
* </binding.ejb>
*
* @version $Rev: 803910 $ $Date: 2009-08-13 15:52:13 +0100 (Thu, 13 Aug 2009) $
*/
public class EJBBindingProcessor implements StAXArtifactProcessor<EJBBindingImpl> {
private PolicyFactory policyFactory;
private ExtensionFactory extensionFactory;
private PolicyAttachPointProcessor policyProcessor;
private StAXAttributeProcessor<Object> extensionAttributeProcessor;
private Monitor monitor;
public EJBBindingProcessor(ExtensionPointRegistry extensionPoints) {
ModelFactoryExtensionPoint modelFactories = extensionPoints.getExtensionPoint(ModelFactoryExtensionPoint.class);
this.policyFactory = modelFactories.getFactory(PolicyFactory.class);
this.extensionFactory = modelFactories.getFactory(ExtensionFactory.class);
this.policyProcessor = new PolicyAttachPointProcessor(policyFactory);
XMLInputFactory inputFactory = modelFactories.getFactory(XMLInputFactory.class);
XMLOutputFactory outputFactory = modelFactories.getFactory(XMLOutputFactory.class);
StAXAttributeProcessorExtensionPoint attributeExtensionPoint = extensionPoints.getExtensionPoint(StAXAttributeProcessorExtensionPoint.class);
this.extensionAttributeProcessor = new ExtensibleStAXAttributeProcessor(attributeExtensionPoint ,inputFactory, outputFactory, this.monitor);
UtilityExtensionPoint utilities = extensionPoints.getExtensionPoint(UtilityExtensionPoint.class);
MonitorFactory monitorFactory = utilities.getUtility(MonitorFactory.class);
if (monitorFactory != null) {
this.monitor = monitorFactory.createMonitor();
}
}
/**
* Report a error.
*
* @param problems
* @param message
* @param model
*/
private void error(String message, Object model, Object... messageParameters) {
if (monitor != null) {
Problem problem = new ProblemImpl(this.getClass().getName(), "binding-ejb-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
monitor.problem(problem);
}
}
/**
* {@inheritDoc}
*/
public QName getArtifactType() {
return EJBBinding.BINDING_EJB_QNAME;
}
/**
* {@inheritDoc}
*/
public EJBBindingImpl read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
EJBBindingImpl ejbBinding = new EJBBindingImpl();
// Read the policies
policyProcessor.readPolicies(ejbBinding, reader);
// Read the name
String name = reader.getAttributeValue(null, EJBBinding.NAME);
if (name != null) {
ejbBinding.setName(name);
}
// Read binding URI
String uri = reader.getAttributeValue(null, EJBBinding.URI);
if (uri != null) {
ejbBinding.setURI(uri);
}
String homeInterface = reader.getAttributeValue(null, EJBBinding.HOME_INTERFACE);
if (homeInterface != null) {
ejbBinding.setHomeInterface(homeInterface);
}
String ejbLinkName = reader.getAttributeValue(null, EJBBinding.EJB_LINK_NAME);
if (ejbLinkName != null) {
ejbBinding.setEjbLinkName(ejbLinkName);
}
String sessionType = reader.getAttributeValue(null, EJBBinding.SESSION_TYPE);
if (sessionType != null) {
if (sessionType.equals("stateless")) {
ejbBinding.setSessionType(EJBBinding.SessionType.STATELESS);
} else if (sessionType.equals("stateful")) {
ejbBinding.setSessionType(EJBBinding.SessionType.STATEFUL);
} else {
error("UnknownEJBSessionType", reader, sessionType, name);
//throw new ContributionReadException("Unknown EJB Session Type of " + sessionType + " for " + name);
}
}
String ejbVersion = reader.getAttributeValue(null, EJBBinding.EJB_VERSION);
if (ejbVersion != null) {
if (ejbVersion.equals("EJB2")) {
ejbBinding.setEjbVersion(EJBBinding.EJBVersion.EJB2);
} else if (ejbVersion.equals("EJB3")) {
ejbBinding.setEjbVersion(EJBBinding.EJBVersion.EJB3);
} else {
error("UnknownEJBVersion", reader, ejbVersion, name);
//throw new ContributionReadException("Unknown EJB Version of " + ejbVersion + " for " + name);
}
}
// TODO: Read requires
String requires = reader.getAttributeValue(null, EJBBinding.REQUIRES);
if (requires != null) {
ejbBinding.setRequires(requires);
}
// Handle extended attributes
QName elementName = reader.getName();
for (int a = 0; a < reader.getAttributeCount(); a++) {
QName attributeName = reader.getAttributeName(a);
if( attributeName.getNamespaceURI() != null && attributeName.getNamespaceURI().length() > 0) {
if( ! elementName.getNamespaceURI().equals(attributeName.getNamespaceURI()) ) {
Object attributeValue = extensionAttributeProcessor.read(attributeName, reader);
Extension attributeExtension;
if (attributeValue instanceof Extension) {
attributeExtension = (Extension) attributeValue;
} else {
attributeExtension = extensionFactory.createExtension(attributeName, attributeValue, true);
}
ejbBinding.getAttributeExtensions().add(attributeExtension);
}
}
}
return ejbBinding;
}
public void write(EJBBindingImpl ejbBinding, XMLStreamWriter writer) throws ContributionWriteException,
XMLStreamException {
// Write a <binding.ejb>
writer.writeStartElement(Constants.SCA10_NS, EJBBinding.BINDING_EJB);
if (ejbBinding.getName() != null){
writer.writeAttribute(EJBBinding.NAME, ejbBinding.getName());
}
if (ejbBinding.getURI() != null){
writer.writeAttribute(EJBBinding.URI, ejbBinding.getURI());
}
for(Extension extension : ejbBinding.getAttributeExtensions()) {
if(extension.isAttribute()) {
extensionAttributeProcessor.write(extension, writer);
}
}
// FIXME Implement the rest
writer.writeEndElement();
}
public Class<EJBBindingImpl> getModelType() {
return EJBBindingImpl.class;
}
public void resolve(EJBBindingImpl ejbBinding, ModelResolver modelResolver) throws ContributionResolveException {
}
}