/*
* 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.implementation.data;
import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamConstants;
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.contribution.ModelFactoryExtensionPoint;
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.data.engine.ConnectionInfoArtifactProcessor;
import org.apache.tuscany.sca.data.engine.config.ConnectionInfo;
import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
import org.apache.tuscany.sca.monitor.Monitor;
/**
* Implements a StAX artifact processor for DATA implementations.
*
* The artifact processor is responsible for processing
* elements in SCA assembly XML composite files and populating the DATA
* implementation model, resolving its references to other artifacts in the SCA
* contribution, and optionally write the model back to SCA assembly XML.
*
* @version $Rev$ $Date$
*/
public class DATAImplementationProcessor implements StAXArtifactProcessor {
protected static final QName IMPLEMENTATION_DATA_XML = new QName(Constants.SCA10_TUSCANY_NS, "implementation.data.xml");
private DATAImplementationFactory dataFactory;
private Monitor monitor;
private StAXArtifactProcessor connectionInfoProcessor;
public DATAImplementationProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) {
AssemblyFactory assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
JavaInterfaceFactory javaFactory = modelFactories.getFactory(JavaInterfaceFactory.class);
this.monitor = monitor;
this.dataFactory = new DATAImplementationFactory(assemblyFactory, javaFactory);
this.connectionInfoProcessor = new ConnectionInfoArtifactProcessor(modelFactories, this.monitor);
}
public QName getArtifactType() {
// Returns the qname of the XML element processed by this processor
return IMPLEMENTATION_DATA_XML;
}
public Class getModelType() {
// Returns the type of model processed by this processor
return DATAImplementation.class;
}
/*
*
*
*
*
*
*
*
*/
public DATAImplementation read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
assert IMPLEMENTATION_DATA_XML.equals(reader.getName());
// Read an element
// Create an initialize the DAS implementation model
DATAImplementation implementation = dataFactory.createDASImplementation();
while (true) {
int event = reader.next();
switch (event) {
case START_ELEMENT:
if (ConnectionInfoArtifactProcessor.CONNECTION_INFO.equals(reader.getName())) {
// Read connection info
ConnectionInfo connectionInfo = (ConnectionInfo) connectionInfoProcessor.read(reader);
implementation.setConnectionInfo(connectionInfo);
}
break;
case XMLStreamConstants.END_ELEMENT:
if (IMPLEMENTATION_DATA_XML.equals(reader.getName())) {
return implementation;
}
break;
}
}
}
public void resolve(DATAImplementation impl, ModelResolver resolver) throws ContributionResolveException {
}
public void write(DATAImplementation implementation, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
writer.writeStartElement(IMPLEMENTATION_DATA_XML.getNamespaceURI(), IMPLEMENTATION_DATA_XML.getLocalPart());
if (implementation.getConnectionInfo() != null) {
connectionInfoProcessor.write(implementation.getConnectionInfo(), writer);
}
writer.writeEndElement();
}
}