/*
* 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.xquery.xml;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
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.contribution.Artifact;
import org.apache.tuscany.sca.contribution.ContributionFactory;
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.resolver.ResourceReference;
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.implementation.xquery.XQueryImplementation;
import org.apache.tuscany.sca.implementation.xquery.XQueryImplementationFactory;
import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
/**
* Processor for the xquery implementation type artifact
* @version $Rev: 615735 $ $Date: 2008-01-27 22:13:25 -0800 (Sun, 27 Jan 2008) $
*/
public class XQueryImplementationProcessor implements StAXArtifactProcessor<XQueryImplementation> {
private static final String LOCATION = "location";
private static final String IMPLEMENTATION_XQUERY = "implementation.xquery";
private static final QName IMPLEMENTATION_XQUERY_QNAME =
new QName(Constants.SCA10_TUSCANY_NS, IMPLEMENTATION_XQUERY);
private static final String MSG_LOCATION_MISSING = "Reading implementation.xquery - location attribute missing";
private AssemblyFactory assemblyFactory;
private JavaInterfaceFactory javaFactory;
private ContributionFactory contributionFactory;
public XQueryImplementationProcessor(ModelFactoryExtensionPoint modelFactoryExtensionPoint) {
assemblyFactory = modelFactoryExtensionPoint.getFactory(AssemblyFactory.class);
javaFactory = modelFactoryExtensionPoint.getFactory(JavaInterfaceFactory.class);
contributionFactory = modelFactoryExtensionPoint.getFactory(ContributionFactory.class);
}
public QName getArtifactType() {
return IMPLEMENTATION_XQUERY_QNAME;
}
/**
* Reads from the stream and sets the location attribute of the implementation correspondingly
*/
public XQueryImplementation read(XMLStreamReader reader)
throws ContributionReadException, XMLStreamException {
/* Read the location attribute for the xquery implementation */
String xqueryLocation = reader.getAttributeValue(null, LOCATION);
if (xqueryLocation == null) {
throw new ContributionReadException(MSG_LOCATION_MISSING);
}
/* Create the XQuery implementation and set the location into it */
XQueryImplementation xqueryImplementation =
XQueryImplementationFactory.INSTANCE.createXQueryImplementation();
xqueryImplementation.setLocation(xqueryLocation);
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && IMPLEMENTATION_XQUERY_QNAME.equals(reader.getName())) {
break;
}
} // end while
xqueryImplementation.setUnresolved(true);
return xqueryImplementation;
}
public void write(XQueryImplementation xqueryImplementation, XMLStreamWriter writer)
throws ContributionWriteException, XMLStreamException {
writer.writeStartElement(Constants.SCA10_TUSCANY_NS, IMPLEMENTATION_XQUERY);
if (xqueryImplementation.getLocation() != null) {
writer.writeAttribute(LOCATION, xqueryImplementation.getLocation());
}
writer.writeEndElement();
}
public Class<XQueryImplementation> getModelType() {
return XQueryImplementation.class;
}
/**
* Resolves the implementation: its services and references, by invoking the xquery
* introspector
*/
public void resolve(XQueryImplementation xqueryImplementation, ModelResolver resolver)
throws ContributionResolveException {
Artifact artifact = contributionFactory.createArtifact();
artifact.setURI(xqueryImplementation.getLocation());
artifact = resolver.resolveModel(Artifact.class, artifact);
if (artifact.getLocation() == null) {
throw new ContributionResolveException("Could not locate file: " + xqueryImplementation.getLocation());
}
xqueryImplementation.setLocationURL(artifact.getLocation());
XQueryIntrospector introspector = new XQueryIntrospector(assemblyFactory, javaFactory);
boolean success = introspector.introspect(xqueryImplementation, resolver);
if (success) {
xqueryImplementation.setUnresolved(false);
}
}
}