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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.node.xml;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
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.assembly.Composite;
import org.apache.tuscany.sca.assembly.xml.Constants;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
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;
import org.apache.tuscany.sca.implementation.node.NodeImplementation;
import org.apache.tuscany.sca.implementation.node.NodeImplementationFactory;
import org.apache.tuscany.sca.monitor.Monitor;
/**
* Implements a StAX artifact processor for node implementations.
*
* @version $Rev$ $Date$
*/
public class NodeImplementationProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<NodeImplementation> {
private static final QName IMPLEMENTATION_NODE = new QName(Constants.SCA10_TUSCANY_NS, "implementation.node");
private AssemblyFactory assemblyFactory;
private NodeImplementationFactory implementationFactory;
public NodeImplementationProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) {
this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
this.implementationFactory = modelFactories.getFactory(NodeImplementationFactory.class);
}
public QName getArtifactType() {
// Returns the QName of the XML element processed by this processor
return IMPLEMENTATION_NODE;
}
public Class<NodeImplementation> getModelType() {
// Returns the type of model processed by this processor
return NodeImplementation.class;
}
public NodeImplementation read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
// Read an <implementation.node> element
NodeImplementation implementation = implementationFactory.createNodeImplementation();
implementation.setUnresolved(false);
// Read the composite attribute
QName qname = getQName(reader, "composite");
if (qname != null) {
Composite composite = assemblyFactory.createComposite();
composite.setName(qname);
String uri = getString(reader, "uri");
composite.setURI(uri);
composite.setUnresolved(true);
implementation.setComposite(composite);
}
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && IMPLEMENTATION_NODE.equals(reader.getName())) {
break;
}
}
return implementation;
}
public void resolve(NodeImplementation implementation, ModelResolver resolver) throws ContributionResolveException {
// We do not need to resolve the referenced composites here
// Nodes and application composites are not in the same composition tree
}
public void write(NodeImplementation implementation, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
// Write <implementation.node>
Composite composite = implementation.getComposite();
QName qname;
String uri;
if (composite != null) {
qname = composite.getName();
uri = composite.getURI();
} else {
qname = null;
uri = null;
}
writeStart(writer, IMPLEMENTATION_NODE.getNamespaceURI(), IMPLEMENTATION_NODE.getLocalPart(),
new XAttr("composite", qname), new XAttr("uri", uri));
writeEnd(writer);
}
}
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