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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.xml;
import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
import java.util.List;
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.assembly.Composite;
import org.apache.tuscany.sca.contribution.Contribution;
import org.apache.tuscany.sca.contribution.ContributionFactory;
import org.apache.tuscany.sca.contribution.Export;
import org.apache.tuscany.sca.contribution.Import;
import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor;
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;
/**
* Processor for contribution metadata
*
* @version $Rev$ $Date$
*/
public class ContributionMetadataProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<Contribution> {
private static final String SCA10_NS = "http://www.osoa.org/xmlns/sca/1.0";
private static final QName CONTRIBUTION_QNAME = new QName(SCA10_NS, "contribution");
private static final QName DEPLOYABLE_QNAME = new QName(SCA10_NS, "deployable");
private final AssemblyFactory assemblyFactory;
private final ContributionFactory contributionFactory;
private final StAXArtifactProcessor<Object> extensionProcessor;
public ContributionMetadataProcessor(AssemblyFactory assemblyFactory, ContributionFactory contributionFactory, StAXArtifactProcessor<Object> extensionProcessor) {
this.assemblyFactory = assemblyFactory;
this.contributionFactory = contributionFactory;
this.extensionProcessor = extensionProcessor;
}
public QName getArtifactType() {
return CONTRIBUTION_QNAME;
}
public Class<Contribution> getModelType() {
return Contribution.class;
}
public Contribution read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
Contribution contribution = null;
QName name = null;
while (reader.hasNext()) {
int event = reader.getEventType();
switch (event) {
case START_ELEMENT:
name = reader.getName();
if (CONTRIBUTION_QNAME.equals(name)) {
// Read <contribution>
contribution = this.contributionFactory.createContribution();
contribution.setUnresolved(true);
} else if (DEPLOYABLE_QNAME.equals(name)) {
// Read <deployable>
QName compositeName = getQName(reader, "composite");
if (compositeName == null) {
throw new ContributionReadException("Attribute 'composite' is missing");
}
if (contribution != null) {
Composite composite = assemblyFactory.createComposite();
composite.setName(compositeName);
composite.setUnresolved(true);
contribution.getDeployables().add(composite);
}
} else{
// Read an extension element
Object extension = extensionProcessor.read(reader);
if (extension != null && contribution != null) {
if (extension instanceof Import) {
contribution.getImports().add((Import)extension);
} else if (extension instanceof Export) {
contribution.getExports().add((Export)extension);
}
}
}
break;
case XMLStreamConstants.END_ELEMENT:
if (CONTRIBUTION_QNAME.equals(reader.getName())) {
return contribution;
}
break;
}
//Read the next element
if (reader.hasNext()) {
reader.next();
}
}
return contribution;
}
public void write(Contribution contribution, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
// Write <contribution>
writeStartDocument(writer, CONTRIBUTION_QNAME.getNamespaceURI(), CONTRIBUTION_QNAME.getLocalPart());
// Write <import>
for (Import imp: contribution.getImports()) {
extensionProcessor.write(imp, writer);
}
// Write <export>
for (Export export: contribution.getExports()) {
extensionProcessor.write(export, writer);
}
// Write <deployable>
for (Composite deployable: contribution.getDeployables()) {
writeStart(writer, DEPLOYABLE_QNAME.getNamespaceURI(), DEPLOYABLE_QNAME.getLocalPart(),
new XAttr("composite", deployable.getName()));
writeEnd(writer);
}
writeEndDocument(writer);
}
public void resolve(Contribution model, ModelResolver resolver) throws ContributionResolveException {
model.setUnresolved(false);
// Resolve deployable composites
List<Composite> deployables = model.getDeployables();
for (int i = 0, n = deployables.size(); i < n; i++) {
Composite deployable = deployables.get(i);
Composite resolved = (Composite)resolver.resolveModel(Composite.class, deployable);
if (resolved != deployable) {
deployables.set(i, resolved);
}
}
}
}
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