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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.widget;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import java.io.IOException;
import java.net.URL;
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.xml.Constants;
import org.apache.tuscany.sca.contribution.ContributionFactory;
import org.apache.tuscany.sca.contribution.DeployedArtifact;
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;
/**
* Implements a STAX artifact processor for resource implementations.
*/
public class WidgetImplementationProcessor implements StAXArtifactProcessor<WidgetImplementation> {
private static final QName IMPLEMENTATION_WIDGET = new QName(Constants.SCA10_TUSCANY_NS, "implementation.widget");
private ContributionFactory contributionFactory;
private WidgetImplementationFactory implementationFactory;
public WidgetImplementationProcessor(ModelFactoryExtensionPoint modelFactories) {
contributionFactory = modelFactories.getFactory(ContributionFactory.class);
implementationFactory = new WidgetImplementationFactory(modelFactories); //modelFactories.getFactory(WidgetImplementationFactory.class);
}
public QName getArtifactType() {
// Returns the qname of the XML element processed by this processor
return IMPLEMENTATION_WIDGET;
}
public Class<WidgetImplementation> getModelType() {
// Returns the type of model processed by this processor
return WidgetImplementation.class;
}
public WidgetImplementation read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
// Read an <implementation.resource> element
// Read the location attribute specifying the location of the
// resources
String location = reader.getAttributeValue(null, "location");
// Create an initialize the resource implementationmodel
WidgetImplementation implementation = implementationFactory.createWidgetImplementation();
implementation.setLocation(location);
implementation.setUnresolved(true);
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && IMPLEMENTATION_WIDGET.equals(reader.getName())) {
break;
}
}
return implementation;
}
public void resolve(WidgetImplementation implementation, ModelResolver resolver) throws ContributionResolveException {
// Resolve the resource directory location
DeployedArtifact artifact = contributionFactory.createDeployedArtifact();
artifact.setURI(implementation.getLocation());
DeployedArtifact resolved = resolver.resolveModel(DeployedArtifact.class, artifact);
if (resolved.getLocation() != null) {
try {
implementation.setLocationURL(new URL(resolved.getLocation()));
implementation.setUnresolved(false);
} catch (IOException e) {
throw new ContributionResolveException(e);
}
}
}
public void write(WidgetImplementation implementation, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
// Write <implementation.resource>
writer.setPrefix("widget",IMPLEMENTATION_WIDGET.getNamespaceURI());
writer.writeStartElement(IMPLEMENTATION_WIDGET.getNamespaceURI(), IMPLEMENTATION_WIDGET.getLocalPart());
writer.writeNamespace("widget",IMPLEMENTATION_WIDGET.getNamespaceURI());
if (implementation.getLocation() != null) {
writer.writeAttribute("location", implementation.getLocation());
}
writer.writeEndElement();
}
}
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