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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.service.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.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.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;
/**
* Loader that handles contribution metadata files
*
* @version $Rev$ $Date$
*/
public class ContributionMetadataProcessor implements StAXArtifactProcessor<Contribution> {
private static final String SCA10_NS = "http://www.osoa.org/xmlns/sca/1.0";
private static final String TARGET_NAMESPACE = "targetNamespace";
private static final QName CONTRIBUTION = new QName(SCA10_NS, "contribution");
private static final QName DEPLOYABLE = new QName(SCA10_NS, "deployable");
private final AssemblyFactory assemblyFactory;
private final ContributionFactory contributionFactory;
private final StAXArtifactProcessor extensionProcessor;
public ContributionMetadataProcessor(AssemblyFactory assemblyFactory, ContributionFactory contributionFactory, StAXArtifactProcessor extensionProcessor) {
super();
this.assemblyFactory = assemblyFactory;
this.contributionFactory = contributionFactory;
this.extensionProcessor = extensionProcessor;
}
public QName getArtifactType() {
return CONTRIBUTION;
}
public Class<Contribution> getModelType() {
return Contribution.class;
}
public Contribution read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
Contribution contribution = this.contributionFactory.createContribution();
String targetNameSpaceURI = null;
QName element = null;
while (reader.hasNext()) {
int event = reader.getEventType();
switch (event) {
case START_ELEMENT:
element = reader.getName();
if (CONTRIBUTION.equals(element)) {
targetNameSpaceURI = reader.getAttributeValue(null, TARGET_NAMESPACE);
} else if (DEPLOYABLE.equals(element)) {
String name = reader.getAttributeValue(null, "composite");
if (name == null) {
throw new ContributionReadException("Attribute 'composite' is missing");
}
QName compositeName = null;
int index = name.indexOf(':');
if (index != -1) {
String prefix = name.substring(0, index);
String localPart = name.substring(index + 1);
String ns = reader.getNamespaceContext().getNamespaceURI(prefix);
if (ns == null) {
throw new ContributionReadException("Invalid prefix: " + prefix);
}
compositeName = new QName(targetNameSpaceURI, localPart, prefix);
} else {
String prefix = "";
String localPart = name;
compositeName = new QName(targetNameSpaceURI, localPart, prefix);
}
Composite composite = assemblyFactory.createComposite();
composite.setName(compositeName);
composite.setUnresolved(true);
contribution.getDeployables().add(composite);
} else{
//process extension
Object extension = extensionProcessor.read(reader);
if (extension != 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.equals(reader.getName())) {
return contribution;
}
break;
}
//Read the next element
if (reader.hasNext()) {
reader.next();
}
}
return contribution;
}
public void write(Contribution model, XMLStreamWriter outputSource) throws ContributionWriteException, XMLStreamException {
// TODO Auto-generated method stub
}
public void resolve(Contribution model, ModelResolver resolver) throws ContributionResolveException {
// TODO Auto-generated method stub
}
}
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