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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.node.configuration.xml;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
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.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.resolver.ModelResolver;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.node.configuration.ContributionConfiguration;
import org.apache.tuscany.sca.node.configuration.NodeConfiguration;
import org.apache.tuscany.sca.node.configuration.NodeConfigurationFactory;
/**
* Implements a StAX artifact processor for configured node implementations.
*
* @version $Rev$ $Date$
*/
public class NodeConfigurationATOMProcessor extends BaseStAXArtifactProcessor implements
StAXArtifactProcessor<NodeConfiguration> {
private static final String ATOM_NS = "http://www.w3.org/2005/Atom";
private static final QName FEED_QNAME = new QName(ATOM_NS, "feed");
private static final QName ENTRY_QNAME = new QName(ATOM_NS, "entry");
private static final QName ID_QNAME = new QName(ATOM_NS, "id");
private static final QName LINK_QNAME = new QName(ATOM_NS, "link");
private static final QName CONTENT_QNAME = new QName(ATOM_NS, "content");
private static final String HREF = "href";
private NodeConfigurationFactory factory;
public NodeConfigurationATOMProcessor(FactoryExtensionPoint modelFactories) {
this.factory = modelFactories.getFactory(NodeConfigurationFactory.class);
}
public QName getArtifactType() {
return null;
}
public Class<NodeConfiguration> getModelType() {
// Returns the type of model processed by this processor
return NodeConfiguration.class;
}
public NodeConfiguration read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException, XMLStreamException {
NodeConfiguration config = factory.createNodeConfiguration();
// Read a feed containing links to the composite and the contributions assigned to
// the node
ContributionConfiguration contribution = null;
boolean id = false;
QName name = null;
while (reader.hasNext()) {
int event = reader.getEventType();
switch (event) {
case START_ELEMENT:
name = reader.getName();
if (ENTRY_QNAME.equals(name)) {
// Read an <entry>
contribution = factory.createContributionConfiguration();
} else if (ID_QNAME.equals(name)) {
// Read an <id>
id = true;
} else if (LINK_QNAME.equals(name)) {
// Read a <link>
String href = getString(reader, HREF);
if (contribution != null) {
contribution.setLocation(href);
}
} else if (CONTENT_QNAME.equals(name)) {
// Read a <content>
} else if (FEED_QNAME.equals(name)) {
// Read a <feed>
}
break;
case XMLStreamConstants.CHARACTERS:
// Read characters inside an <id> element
if (id) {
if (contribution != null) {
contribution.setURI(reader.getText());
}
}
break;
case END_ELEMENT:
name = reader.getName();
// Clear current state when reading reaching end element
if (ENTRY_QNAME.equals(name)) {
if (contribution != null) {
config.getContributions().add(contribution);
}
contribution = null;
} else if (ID_QNAME.equals(name)) {
id = false;
} else if (FEED_QNAME.equals(name)) {
// We've reached the end of the feed
return config;
}
break;
}
// Read the next element
if (reader.hasNext()) {
reader.next();
}
}
return config;
}
public void resolve(NodeConfiguration implementation, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
}
public void write(NodeConfiguration implementation, XMLStreamWriter writer, ProcessorContext context) throws ContributionWriteException,
XMLStreamException {
}
}
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