/*
* 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.topology.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.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
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.topology.Node;
import org.apache.tuscany.sca.topology.Runtime;
import org.apache.tuscany.sca.topology.Scheme;
import org.apache.tuscany.sca.topology.Component;
import org.apache.tuscany.sca.topology.TopologyFactory;
/**
* A composite processor.
*
* @version $Rev: 572267 $ $Date: 2007-09-03 10:46:41 +0100 (Mon, 03 Sep 2007) $
*/
public class TopologyProcessor extends BaseTopologyArtifactProcessor implements StAXArtifactProcessor<Runtime> {
/**
* Construct a new composite processor
* @param assemblyFactory
* @param policyFactory
* @param extensionProcessor
*/
public TopologyProcessor(TopologyFactory topologyFactory,
AssemblyFactory assemblyFactory,
StAXArtifactProcessor extensionProcessor) {
super(topologyFactory, assemblyFactory, extensionProcessor);
}
public Runtime read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
QName name = null;
Runtime runtime = null;
Node node = null;
String domainName = DEFAULT_DOMAIN;
// Read the composite document
while (reader.hasNext()) {
int event = reader.getEventType();
switch (event) {
case START_ELEMENT:
name = reader.getName();
if (RUNTIME_QNAME.equals(name)) {
// Read a <runtime>
runtime = topologyFactory.createRuntime();
} else if (NODE_QNAME.equals(name)) {
// Read a <node>
node = topologyFactory.createNode();
node.setName(getString(reader, NAME));
// add node to runtime
runtime.getNodes().add(node);
// reset domain name to the default
domainName = DEFAULT_DOMAIN;
} else if (DOMAIN_QNAME.equals(name)) {
// Read a <domain>
domainName = getString(reader, NAME);
} else if (SCHEME_QNAME.equals(name)) {
// Read a <scheme>
Scheme scheme = topologyFactory.createScheme();
scheme.setName(getString(reader, NAME));
scheme.setBaseURL(getString(reader, BASE_URL));
scheme.setDomainName(domainName);
// Add scheme to the node
node.getSchemes(domainName).add(scheme);
} else if (COMPONENT_QNAME.equals(name)) {
// Read a <component>
Component component = topologyFactory.createComponent();
component.setName(getString(reader, NAME));
component.setDomainName(domainName);
// Add scheme to the node
node.getComponents(domainName).add(component);
} else {
// Read an extension element
Object extension = extensionProcessor.read(reader);
if (extension != null) {
// no extensions are supported
}
}
case END_ELEMENT:
name = reader.getName();
// Clear current state when reading reaching end element
}
if (reader.hasNext()) {
reader.next();
}
}
return runtime;
}
public void write(Runtime runtime, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
writeStartDocument(writer, RUNTIME);
// TODO - write out the scheme definitions
for (Node node : runtime.getNodes()) {
writeStart(writer, NODE, new XAttr(NAME, node.getName()));
for (String domainName : node.getDomainNames()) {
writeStart(writer, DOMAIN, new XAttr(NAME, domainName));
for (Scheme scheme: node.getSchemes(domainName)) {
writeStart(writer, SCHEME, new XAttr(NAME, scheme.getName()), new XAttr(BASE_URL, scheme.getBaseURL()));
writeEnd(writer);
}
for (Component component: node.getComponents(domainName)) {
writeStart(writer, COMPONENT, new XAttr(NAME, component.getName()));
writeEnd(writer);
}
writeEnd(writer);
}
writeEnd(writer);
}
writeEndDocument(writer);
}
public void resolve(Runtime runtime, ModelResolver resolver) throws ContributionResolveException {
// no resolution steps defined
}
public QName getArtifactType() {
return RUNTIME_QNAME;
}
public Class<Runtime> getModelType() {
return Runtime.class;
}
}