/*
* 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.contribution.namespace.impl;
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.contribution.namespace.NamespaceExport;
import org.apache.tuscany.sca.contribution.namespace.NamespaceImportExportFactory;
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.processor.StAXAttributeProcessor;
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;
/**
* Artifact processor for Namespace export
*
* @version $Rev: 924584 $ $Date: 2010-03-18 01:34:22 +0000 (Thu, 18 Mar 2010) $
*/
public class NamespaceExportProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<NamespaceExport> {
private static final String SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200912";
private static final QName EXPORT = new QName(SCA11_NS, "export");
private static final String NAMESPACE = "namespace";
private final NamespaceImportExportFactory factory;
private final AssemblyFactory extensionFactory;
private final StAXArtifactProcessor<Object> extensionProcessor;
private final StAXAttributeProcessor<Object> attributeProcessor;
public NamespaceExportProcessor(FactoryExtensionPoint modelFactories,
StAXArtifactProcessor<Object> extensionProcessor,
StAXAttributeProcessor<Object> attributeProcessor) {
this.factory = modelFactories.getFactory(NamespaceImportExportFactory.class);
this.extensionFactory = modelFactories.getFactory(AssemblyFactory.class);
this.extensionProcessor = extensionProcessor;
this.attributeProcessor = attributeProcessor;
}
/**
* Report a warning.
*
* @param problems
* @param message
* @param model
*/
private void error(Monitor monitor, String message, Object model, Object... messageParameters) {
if (monitor != null) {
Problem problem = monitor.createProblem(this.getClass().getName(), "contribution-namespace-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters);
monitor.problem(problem);
}
}
public QName getArtifactType() {
return EXPORT;
}
public Class<NamespaceExport> getModelType() {
return NamespaceExport.class;
}
/**
* Process <export namespace=""/>
*/
public NamespaceExport read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException {
NamespaceExport namespaceExport = this.factory.createNamespaceExport();
QName element = null;
try {
while (reader.hasNext()) {
int event = reader.getEventType();
switch (event) {
case START_ELEMENT:
element = reader.getName();
// Read <export>
if (EXPORT.equals(element)) {
String ns = reader.getAttributeValue(null, NAMESPACE);
if (ns == null) {
error(context.getMonitor(), "AttributeNameSpaceMissing", reader);
//throw new ContributionReadException("Attribute 'namespace' is missing");
} else {
namespaceExport.setNamespace(ns);
}
readExtendedAttributes(reader, namespaceExport, attributeProcessor, extensionFactory, context);
} else {
//read extended elements
Object ext = extensionProcessor.read(reader, context);
if (namespaceExport != null) {
namespaceExport.getExtensions().add(ext);
}
}
break;
case XMLStreamConstants.END_ELEMENT:
if (EXPORT.equals(reader.getName())) {
return namespaceExport;
}
break;
}
// Read the next element
if (reader.hasNext()) {
reader.next();
}
}
}
catch (XMLStreamException e) {
ContributionReadException ex = new ContributionReadException(e);
error(context.getMonitor(), "XMLStreamException", reader, ex);
}
return namespaceExport;
}
public void write(NamespaceExport namespaceExport, XMLStreamWriter writer, ProcessorContext context) throws ContributionWriteException, XMLStreamException {
// Write <export>
writer.writeStartElement(EXPORT.getNamespaceURI(), EXPORT.getLocalPart());
if (namespaceExport.getNamespace() != null) {
writer.writeAttribute(NAMESPACE, namespaceExport.getNamespace());
}
writeExtendedAttributes(writer, namespaceExport, attributeProcessor, context);
// handle extended elements
for (Object ext : namespaceExport.getExtensions()) {
extensionProcessor.write(ext, writer, context);
}
writer.writeEndElement();
}
public void resolve(NamespaceExport namespaceExport, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
if (namespaceExport.getNamespace() != null)
// Initialize the export's resolver
namespaceExport.setModelResolver(new NamespaceExportModelResolver(resolver));
}
}