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/*
* 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.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;
import org.apache.tuscany.sca.monitor.Monitor;
import org.apache.tuscany.sca.monitor.Problem;
import org.apache.tuscany.sca.monitor.Problem.Severity;
import org.apache.tuscany.sca.monitor.impl.ProblemImpl;
/**
* Processor for the XQuery implementation type artifact
* @version $Rev$ $Date$
*/
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 AssemblyFactory assemblyFactory;
private JavaInterfaceFactory javaFactory;
private ContributionFactory contributionFactory;
private Monitor monitor;
public XQueryImplementationProcessor(ModelFactoryExtensionPoint modelFactoryExtensionPoint, Monitor monitor) {
assemblyFactory = modelFactoryExtensionPoint.getFactory(AssemblyFactory.class);
javaFactory = modelFactoryExtensionPoint.getFactory(JavaInterfaceFactory.class);
contributionFactory = modelFactoryExtensionPoint.getFactory(ContributionFactory.class);
this.monitor = monitor;
}
/**
* 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(), "impl-xquery-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
monitor.problem(problem);
}
}
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 {
/* Create the XQuery implementation and set the location into it */
XQueryImplementation xqueryImplementation = null;
/* Read the location attribute for the XQuery implementation */
String xqueryLocation = reader.getAttributeValue(null, LOCATION);
if (xqueryLocation != null) {
xqueryImplementation = XQueryImplementationFactory.INSTANCE.createXQueryImplementation();
xqueryImplementation.setLocation(xqueryLocation);
xqueryImplementation.setUnresolved(true);
} else {
error("LocationAttributeMissing", reader);
//throw new ContributionReadException(MSG_LOCATION_MISSING);
}
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && IMPLEMENTATION_XQUERY_QNAME.equals(reader.getName())) {
break;
}
} // end while
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 {
if (xqueryImplementation != null) {
Artifact artifact = contributionFactory.createArtifact();
artifact.setURI(xqueryImplementation.getLocation());
artifact = resolver.resolveModel(Artifact.class, artifact);
if (artifact.getLocation() != null) {
xqueryImplementation.setLocationURL(artifact.getLocation());
XQueryIntrospector introspector = new XQueryIntrospector(assemblyFactory, javaFactory);
boolean success = introspector.introspect(xqueryImplementation, resolver);
if (success) {
xqueryImplementation.setUnresolved(false);
}
} else {
error("CouldNotLocateFile", resolver, xqueryImplementation.getLocation());
//throw new ContributionResolveException("Could not locate file: " + xqueryImplementation.getLocation());
}
}
}
}
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