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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.bpel.impl;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import java.util.HashMap;
import java.util.Map;
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.ComponentType;
import org.apache.tuscany.sca.assembly.Property;
import org.apache.tuscany.sca.assembly.Reference;
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.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.databinding.xml.DOMDataBinding;
import org.apache.tuscany.sca.implementation.bpel.BPELFactory;
import org.apache.tuscany.sca.implementation.bpel.BPELImplementation;
import org.apache.tuscany.sca.implementation.bpel.BPELProcessDefinition;
import org.apache.tuscany.sca.implementation.bpel.DefaultBPELFactory;
/**
* Implements a STAX artifact processor for BPEL implementations.
*
* The artifact processor is responsible for processing <implementation.bpel>
* elements in SCA assembly XML composite files and populating the BPEL
* 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 BPELImplementationProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<BPELImplementation> {
private static final QName IMPLEMENTATION_BPEL = new QName(Constants.SCA10_NS, "implementation.bpel");
private AssemblyFactory assemblyFactory;
private BPELFactory bpelFactory;
public BPELImplementationProcessor(ModelFactoryExtensionPoint modelFactories) {
this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
this.bpelFactory = new DefaultBPELFactory(modelFactories);
}
public QName getArtifactType() {
// Returns the qname of the XML element processed by this processor
return IMPLEMENTATION_BPEL;
}
public Class<BPELImplementation> getModelType() {
// Returns the type of model processed by this processor
return BPELImplementation.class;
}
public BPELImplementation read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
assert IMPLEMENTATION_BPEL.equals(reader.getName());
// Read an <implementation.bpel> element
// Read the process attribute.
QName process = getAttributeValueNS(reader, "process");
// Create an initialize the BPEL implementation model
BPELImplementation implementation = bpelFactory.createBPELImplementation();
implementation.setProcess(process);
implementation.setUnresolved(true);
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && IMPLEMENTATION_BPEL.equals(reader.getName())) {
break;
}
}
return implementation;
}
public void resolve(BPELImplementation impl, ModelResolver resolver) throws ContributionResolveException {
if( impl != null && impl.isUnresolved()) {
BPELProcessDefinition processDefinition = resolveBPELProcessDefinition(impl, resolver);
if(processDefinition.isUnresolved()) {
throw new ContributionResolveException("Can't find BPEL Process : " + processDefinition.getName());
}
impl.setProcessDefinition(processDefinition);
//resolve component type
mergeComponentType(resolver, impl);
//set current implementation resolved
impl.setUnresolved(false);
}
}
public void write(BPELImplementation model, XMLStreamWriter outputSource) throws ContributionWriteException {
//FIXME Implement
}
private BPELProcessDefinition resolveBPELProcessDefinition(BPELImplementation impl, ModelResolver resolver) throws ContributionResolveException {
QName processName = impl.getProcess();
BPELProcessDefinition processDefinition = this.bpelFactory.createBPELProcessDefinition();
processDefinition.setName(processName);
processDefinition.setUnresolved(true);
return resolver.resolveModel(BPELProcessDefinition.class, processDefinition);
}
/**
* Merge the componentType from introspection and external file
* @param resolver
* @param impl
*/
private void mergeComponentType(ModelResolver resolver, BPELImplementation 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());
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()) {
//set default dataBinding to DOM
service.getInterfaceContract().getInterface().resetDataBinding(DOMDataBinding.NAME);
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 ComponentType getComponentType(ModelResolver resolver, BPELImplementation impl) {
String bpelProcessURI = impl.getProcessDefinition().getURI().toString();
String componentTypeURI = bpelProcessURI.replace(".bpel", ".componentType");
ComponentType componentType = assemblyFactory.createComponentType();
componentType.setUnresolved(true);
componentType.setURI(componentTypeURI);
componentType = resolver.resolveModel(ComponentType.class, componentType);
if (!componentType.isUnresolved()) {
return componentType;
}
return null;
}
private QName getAttributeValueNS(XMLStreamReader reader, String attribute) {
String fullValue = reader.getAttributeValue(null, "process");
if (fullValue.indexOf(":") < 0)
throw new ODEProcessException("Attribute " + attribute + " with value " + fullValue +
" in your composite should be prefixed (process=\"prefix:name\").");
String prefix = fullValue.substring(0, fullValue.indexOf(":"));
String name = fullValue.substring(fullValue.indexOf(":") + 1);
String nsUri = reader.getNamespaceContext().getNamespaceURI(prefix);
if (nsUri == null)
throw new ODEProcessException("Attribute " + attribute + " with value " + fullValue +
" in your composite has un unrecognized namespace prefix.");
return new QName(nsUri, name, prefix);
}
}
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