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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.AssemblyFactory;
import org.apache.tuscany.sca.contribution.Artifact;
import org.apache.tuscany.sca.contribution.ContributionFactory;
import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
import org.apache.tuscany.sca.contribution.processor.ContributionWriteException;
import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.monitor.Monitor;
import org.apache.tuscany.sca.monitor.Problem;
import org.apache.tuscany.sca.monitor.Problem.Severity;
/**
*
* Implements a StAX artifact processor for Widget implementations.
*
* @version $Rev$ $Date$
*/
public class WidgetImplementationProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<WidgetImplementation> {
private AssemblyFactory assemblyFactory;
private ContributionFactory contributionFactory;
private WidgetImplementationFactory implementationFactory;
private Monitor monitor;
public WidgetImplementationProcessor(FactoryExtensionPoint modelFactories, Monitor monitor) {
assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
contributionFactory = modelFactories.getFactory(ContributionFactory.class);
implementationFactory = modelFactories.getFactory(WidgetImplementationFactory.class);
this.monitor = monitor;
}
/**
* Report a exception.
*
* @param problems
* @param message
* @param model
*/
private void error(String message, Object model, Exception ex) {
if (monitor != null) {
Problem problem = monitor.createProblem(this.getClass().getName(), "impl-widget-validation-messages", Severity.ERROR, model, message, ex);
monitor.problem(problem);
}
}
/**
* Report a error.
*
* @param problems
* @param message
* @param model
*/
private void error(String message, Object model, Object... messageParameters) {
if (monitor != null) {
Problem problem = monitor.createProblem(this.getClass().getName(), "impl-widget-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
monitor.problem(problem);
}
}
public QName getArtifactType() {
// Returns the QName of the XML element processed by this processor
return WidgetImplementation.TYPE;
}
public Class<WidgetImplementation> getModelType() {
// Returns the type of model processed by this processor
return WidgetImplementation.class;
}
public WidgetImplementation read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException, XMLStreamException {
// Read an <implementation.widget> element
// Create and initialize the resource implementation model
WidgetImplementation implementation = null;
// Read the location attribute specifying the location of the resources
String location = reader.getAttributeValue(null, "location");
if (location != null) {
implementation = implementationFactory.createWidgetImplementation();
implementation.setLocation(location);
implementation.setUnresolved(true);
} else {
error("LocationAttributeMissing", reader);
//throw new ContributionReadException(MSG_LOCATION_MISSING);
}
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && WidgetImplementation.TYPE.equals(reader.getName())) {
break;
}
}
return implementation;
}
public void resolve(WidgetImplementation implementation, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
if (implementation != null) {
// Resolve the resource directory location
Artifact artifact = contributionFactory.createArtifact();
artifact.setURI(implementation.getLocation());
Artifact resolved = resolver.resolveModel(Artifact.class, artifact, context);
if (resolved.getLocation() != null) {
try {
implementation.setLocationURL(new URL(resolved.getLocation()));
//introspect implementation
WidgetImplementationIntrospector widgetIntrospector =
new WidgetImplementationIntrospector(assemblyFactory, implementation);
widgetIntrospector.introspectImplementation();
implementation.setUnresolved(false);
} catch (IOException e) {
ContributionResolveException ce = new ContributionResolveException(e);
error("ContributionResolveException", resolver, ce);
//throw ce;
}
} else {
error("CouldNotResolveLocation", resolver, implementation.getLocation());
//throw new ContributionResolveException("Could not resolve implementation.widget location: " + implementation.getLocation());
}
}
}
public void write(WidgetImplementation implementation, XMLStreamWriter writer, ProcessorContext context) throws ContributionWriteException, XMLStreamException {
// Write <implementation.widget>
writeStart(writer, WidgetImplementation.TYPE.getNamespaceURI(), WidgetImplementation.TYPE.getLocalPart());
if (implementation.getLocation() != null) {
writer.writeAttribute("location", implementation.getLocation());
}
writeEnd(writer);
}
}
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