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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.osgi.xml;
import java.util.ArrayList;
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.Binding;
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.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.implementation.osgi.SCAConfig;
import org.apache.tuscany.sca.implementation.osgi.ServiceDescriptionsFactory;
import org.apache.tuscany.sca.policy.Intent;
import org.apache.tuscany.sca.policy.PolicySet;
/*
<?xml version="1.0" encoding="UTF-8"?>
<scact:sca-config targetNamespace="http://www.foocorp.com/definitions"
xmlns:scact="http://www.osgi.org/xmlns/scact/v1.0.0"
xmlns:sca="http://docs.oasis-open.org/ns/opencsa/sca/200912"
xmlns:foocorp="http://www.foocorp.com/definitions"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.osgi.org/xmlns/scact/v1.0.0 http://www.osgi.org/xmlns/scact/v1.0.0/sca-config.xsd">
<sca:binding.ws name="com.foocorp.FooOrderWebServiceBinding"
uri="http://www.foocorp.com/FooOrderService" requires="sca:soap.1_2" />
<foocorp:binding.rmi name="com.foocorp.FooOrderRMIBinding"
host="www.foocorp.com" port="8099" serviceName="FooOrderService" />
</scact:sca-config>
*/
public class SCAConfigProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<SCAConfig> {
private static final QName SCA_CONFIG_QNAME = new QName("http://www.osgi.org/xmlns/scact/v1.0.0", "sca-config");
private ServiceDescriptionsFactory factory;
private StAXArtifactProcessor processor;
public SCAConfigProcessor(ExtensionPointRegistry registry, StAXArtifactProcessor processor) {
this.processor = processor;
FactoryExtensionPoint modelFactories = registry.getExtensionPoint(FactoryExtensionPoint.class);
this.factory = modelFactories.getFactory(ServiceDescriptionsFactory.class);
}
public SCAConfig read(XMLStreamReader reader, ProcessorContext context) throws XMLStreamException,
ContributionReadException {
int event = reader.getEventType();
SCAConfig definitions = factory.createSCAConfig();
String targetNamespace = null;
while (true) {
switch (event) {
case XMLStreamConstants.START_ELEMENT:
QName name = reader.getName();
if (SCA_CONFIG_QNAME.equals(name)) {
targetNamespace = reader.getAttributeValue(null, "targetNamespace");
definitions.setTargetNamespace(targetNamespace);
} else {
Object extension = processor.read(reader, context);
if (extension != null) {
if (extension instanceof Intent) {
Intent intent = (Intent)extension;
intent.setName(new QName(targetNamespace, intent.getName().getLocalPart()));
definitions.getIntents().add(intent);
for (Intent i : intent.getQualifiedIntents()) {
i.setName(new QName(targetNamespace, i.getName().getLocalPart()));
}
} else if (extension instanceof PolicySet) {
PolicySet policySet = (PolicySet)extension;
policySet.setName(new QName(targetNamespace, policySet.getName().getLocalPart()));
definitions.getPolicySets().add(policySet);
} else if (extension instanceof Binding) {
Binding binding = (Binding)extension;
definitions.getBindings().add(binding);
}
}
}
break;
case XMLStreamConstants.END_ELEMENT:
name = reader.getName();
if (SCA_CONFIG_QNAME.equals(name)) {
return definitions;
}
break;
}
if (reader.hasNext()) {
event = reader.next();
} else {
return definitions;
}
}
}
public QName getArtifactType() {
return SCA_CONFIG_QNAME;
}
public void write(SCAConfig definitions, XMLStreamWriter writer, ProcessorContext context)
throws ContributionWriteException, XMLStreamException {
writeStartDocument(writer,
SCA_CONFIG_QNAME.getNamespaceURI(),
SCA_CONFIG_QNAME.getLocalPart(),
new XAttr("targetNamespace", definitions.getTargetNamespace()));
for (Binding binding : definitions.getBindings()) {
processor.write(binding, writer, context);
}
for (Intent policyIntent : definitions.getIntents()) {
processor.write(policyIntent, writer, context);
}
for (PolicySet policySet : definitions.getPolicySets()) {
processor.write(policySet, writer, context);
}
writeEndDocument(writer);
}
public void resolve(SCAConfig scaDefns, ModelResolver resolver, ProcessorContext context)
throws ContributionResolveException {
// start by adding all of the top level artifacts into the resolver as there
// are many cross artifact references in a definitions file and we don't want
// to be dependent on the order things appear
List<Intent> intents = new ArrayList<Intent>();
List<PolicySet> policySets = new ArrayList<PolicySet>();
List<PolicySet> referredPolicySets = new ArrayList<PolicySet>();
for (Intent intent : scaDefns.getIntents()) {
intents.add(intent);
resolver.addModel(intent, context);
for (Intent i : intent.getQualifiedIntents()) {
intents.add(i);
resolver.addModel(i, context);
}
}
for (PolicySet policySet : scaDefns.getPolicySets()) {
if (policySet.getReferencedPolicySets().isEmpty()) {
policySets.add(policySet);
} else {
referredPolicySets.add(policySet);
}
resolver.addModel(policySet, context);
}
// now resolve everything to ensure that any references between
// artifacts are satisfied
for (Intent policyIntent : intents)
processor.resolve(policyIntent, resolver, context);
for (PolicySet policySet : policySets)
processor.resolve(policySet, resolver, context);
for (PolicySet policySet : referredPolicySets)
processor.resolve(policySet, resolver, context);
}
public Class<SCAConfig> getModelType() {
return SCAConfig.class;
}
}
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