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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.das;
import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
import java.util.HashMap;
import java.util.Map;
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.ComponentType;
import org.apache.tuscany.sca.assembly.Property;
import org.apache.tuscany.sca.assembly.Service;
import org.apache.tuscany.sca.assembly.xml.Constants;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
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.data.engine.ConnectionInfoArtifactProcessor;
import org.apache.tuscany.sca.data.engine.config.ConnectionInfo;
import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
import org.apache.tuscany.sca.monitor.Monitor;
/**
* Implements a StAX artifact processor for DAS implementations.
*
* The artifact processor is responsible for processing <implementation.das>
* elements in SCA assembly XML composite files and populating the DAS
* implementation model, resolving its references to other artifacts in the SCA
* contribution, and optionally write the model back to SCA assembly XML.
*
* @version $Rev$ $Date$
*/
public class DASImplementationProcessor implements StAXArtifactProcessor<DASImplementation> {
private static final QName IMPLEMENTATION_DAS = new QName(Constants.SCA10_TUSCANY_NS, "implementation.das");
private DASImplementationFactory dasFactory;
private final AssemblyFactory assemblyFactory;
private final JavaInterfaceFactory javaFactory;
private Monitor monitor;
private StAXArtifactProcessor<ConnectionInfo> connectionInfoProcessor;
public DASImplementationProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) {
assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
javaFactory = modelFactories.getFactory(JavaInterfaceFactory.class);
this.monitor = monitor;
this.dasFactory = new DefaultDASImplementationFactory(assemblyFactory, javaFactory);
this.connectionInfoProcessor = new ConnectionInfoArtifactProcessor(modelFactories, this.monitor);
}
public QName getArtifactType() {
// Returns the QName of the XML element processed by this processor
return IMPLEMENTATION_DAS;
}
public Class<DASImplementation> getModelType() {
// Returns the type of model processed by this processor
return DASImplementation.class;
}
/*
* <component name="CompanyDataComponent">
* <implementation.das config="/CompanyConfig.xml" dataAccessType="rdb">
* <connectionInfo>
* <connectionProperties
* driverClass="org.apache.derby.jdbc.EmbeddedDriver"
* databaseURL="jdbc:derby:target/test-classes/dastest; create = true"
* loginTimeout="600000"/>
* </connectionInfo>
* </implementation.data>
* </component>
*/
public DASImplementation read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
assert IMPLEMENTATION_DAS.equals(reader.getName());
// Read an <implementation.das> element
// Read the das config file attribute.
// This is das configuration side file to use
String config = reader.getAttributeValue(null, "config");
// Read the data access type attribute
// This is the type of data store in use (e.g RDB, XML, etc)
String dataAccessType = reader.getAttributeValue(null, "dataAccessType");
// Create an initialize the DAS implementation model
DASImplementation implementation = dasFactory.createDASImplementation();
implementation.setConfig(config);
implementation.setDataAccessType(dataAccessType);
implementation.setUnresolved(true);
while (true) {
int event = reader.next();
switch (event) {
case START_ELEMENT:
if (ConnectionInfoArtifactProcessor.CONNECTION_INFO.equals(reader.getName())) {
// Read connection info
ConnectionInfo connectionInfo = (ConnectionInfo) connectionInfoProcessor.read(reader);
implementation.setConnectionInfo(connectionInfo);
}
break;
case XMLStreamConstants.END_ELEMENT:
if (IMPLEMENTATION_DAS.equals(reader.getName())) {
return implementation;
}
break;
}
}
}
public void resolve(DASImplementation impl, ModelResolver resolver) throws ContributionResolveException {
if( impl != null && impl.isUnresolved()) {
//resolve component type
mergeComponentType(resolver, impl);
//set current implementation resolved
impl.setUnresolved(false);
}
}
public void write(DASImplementation implementation, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
writer.writeStartElement(IMPLEMENTATION_DAS.getNamespaceURI(), IMPLEMENTATION_DAS.getLocalPart());
if (implementation.getConfig() != null) {
writer.writeAttribute("config", implementation.getConfig());
}
if (implementation.getDataAccessType() != null) {
writer.writeAttribute("dataAccessType", implementation.getDataAccessType());
}
if (implementation.getConnectionInfo() != null) {
connectionInfoProcessor.write(implementation.getConnectionInfo(), writer);
}
writer.writeEndElement();
}
/**
* Merge the componentType from introspection and external file
* @param resolver
* @param impl
*/
private void mergeComponentType(ModelResolver resolver, DASImplementation impl) {
// FIXME: Need to clarify how to merge
ComponentType componentType = getComponentType(resolver, impl);
if (componentType != null && !componentType.isUnresolved()) {
/*
Map<String, Reference> refMap = new HashMap<String, Reference>();
for (Reference ref : impl.getReferences()) {
refMap.put(ref.getName(), ref);
}
for (Reference reference : componentType.getReferences()) {
refMap.put(reference.getName(), reference);
}
impl.getReferences().clear();
impl.getReferences().addAll(refMap.values());
// Try to match references by type
Map<String, JavaElementImpl> refMembers = impl.getReferenceMembers();
for (Reference ref : impl.getReferences()) {
if (ref.getInterfaceContract() != null) {
Interface i = ref.getInterfaceContract().getInterface();
if (i instanceof JavaInterface) {
Class<?> type = ((JavaInterface)i).getJavaClass();
if (!refMembers.containsKey(ref.getName())) {
JavaElementImpl e = getMemeber(impl, ref.getName(), type);
if (e != null) {
refMembers.put(ref.getName(), e);
}
}
}
}
}*/
Map<String, Service> serviceMap = new HashMap<String, Service>();
for (Service svc : impl.getServices()) {
if(svc != null) {
serviceMap.put(svc.getName(), svc);
}
}
for (Service service : componentType.getServices()) {
serviceMap.put(service.getName(), service);
}
impl.getServices().clear();
impl.getServices().addAll(serviceMap.values());
Map<String, Property> propMap = new HashMap<String, Property>();
for (Property prop : impl.getProperties()) {
propMap.put(prop.getName(), prop);
}
}
}
private String getFileName(String filePath) {
int pos = filePath.lastIndexOf(".");
return filePath.substring(0, pos);
}
private ComponentType getComponentType(ModelResolver resolver, DASImplementation impl) {
String dasConfig = this.getFileName(impl.getConfig());
String componentTypeURI = dasConfig.replace('.', '/') + ".componentType";
ComponentType componentType = assemblyFactory.createComponentType();
componentType.setUnresolved(true);
componentType.setURI(componentTypeURI);
componentType = resolver.resolveModel(ComponentType.class, componentType);
if (!componentType.isUnresolved()) {
return componentType;
}
return null;
}
}
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