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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.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.NamespaceImport;
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 import
*
* @version $Rev$ $Date$
*/
public class NamespaceImportProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<NamespaceImport> {
private static final String SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200912";
private static final QName IMPORT = new QName(SCA11_NS, "import");
private static final String NAMESPACE = "namespace";
private static final String LOCATION = "location";
private final NamespaceImportExportFactory factory;
private final AssemblyFactory extensionFactory;
private final StAXArtifactProcessor<Object> extensionProcessor;
private final StAXAttributeProcessor<Object> attributeProcessor;
public NamespaceImportProcessor(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 IMPORT;
}
public Class<NamespaceImport> getModelType() {
return NamespaceImport.class;
}
/**
* Process <import namespace="" location=""/>
*/
public NamespaceImport read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException {
NamespaceImport namespaceImport = this.factory.createNamespaceImport();
QName element;
try {
while (reader.hasNext()) {
int event = reader.getEventType();
switch (event) {
case START_ELEMENT:
element = reader.getName();
// Read <import>
if (IMPORT.equals(element)) {
String ns = reader.getAttributeValue(null, NAMESPACE);
if (ns == null) {
error(context.getMonitor(), "AttributeNameSpaceMissing", reader);
//throw new ContributionReadException("Attribute 'namespace' is missing");
} else {
namespaceImport.setNamespace(ns);
}
String location = getURIString(reader, LOCATION);
if (location != null) {
namespaceImport.setLocation(location);
}
readExtendedAttributes(reader, namespaceImport, attributeProcessor, extensionFactory, context);
} else {
// handle extended elements
Object ext = extensionProcessor.read(reader, context);
if (namespaceImport != null) {
namespaceImport.getExtensions().add(ext);
}
}
break;
case XMLStreamConstants.END_ELEMENT:
if (IMPORT.equals(reader.getName())) {
return namespaceImport;
}
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 namespaceImport;
}
public void write(NamespaceImport namespaceImport, XMLStreamWriter writer, ProcessorContext context) throws ContributionWriteException, XMLStreamException {
// Write <import>
writer.writeStartElement(IMPORT.getNamespaceURI(), IMPORT.getLocalPart());
if (namespaceImport.getNamespace() != null) {
writer.writeAttribute(NAMESPACE, namespaceImport.getNamespace());
}
if (namespaceImport.getLocation() != null) {
writer.writeAttribute(LOCATION, namespaceImport.getLocation());
}
writeExtendedAttributes(writer, namespaceImport, attributeProcessor, context);
//handle extended elements
for (Object ext : namespaceImport.getExtensions()) {
extensionProcessor.write(ext, writer, context);
}
writer.writeEndElement();
}
public void resolve(NamespaceImport model, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
}
}
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