/*
* 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.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.ode.bpel.compiler.BpelC;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
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.implementation.bpel.BPELImplementation;
import org.apache.tuscany.sca.implementation.bpel.BPELImplementationFactory;
import org.apache.tuscany.sca.implementation.bpel.DefaultBPELImplementationFactory;
import org.apache.tuscany.sca.interfacedef.wsdl.WSDLFactory;
/**
* 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 BPELArtifactProcessor implements StAXArtifactProcessor<BPELImplementation> {
private static final QName IMPLEMENTATION_BPEL = new QName(Constants.SCA10_TUSCANY_NS, "implementation.bpel");
private BPELImplementationFactory bpelFactory;
public BPELArtifactProcessor(ModelFactoryExtensionPoint modelFactories) {
AssemblyFactory assemblyFactory = modelFactories.getFactory(AssemblyFactory.class);
WSDLFactory wsdlFactory = modelFactories.getFactory(WSDLFactory.class);
this.bpelFactory = new DefaultBPELImplementationFactory(assemblyFactory, wsdlFactory);
}
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 {
assert IMPLEMENTATION_BPEL.equals(reader.getName());
// Read an <implementation.bpel> element
try {
// Read the process attribute.
QName process = getAttributeValueNS(reader, "process");
String bpelFile = reader.getAttributeValue(null, "file");
// Resolving the BPEL file and compiling it
URL bpelURL = getClass().getClassLoader().getResource(bpelFile);
if (bpelURL == null)
throw new ODEProcessException("Couldn't find referenced bpel file " + bpelFile);
BpelC bpelc = BpelC.newBpelCompiler();
ByteArrayOutputStream compiledProcess = new ByteArrayOutputStream();
bpelc.setOutputStream(compiledProcess);
try {
bpelc.compile(new File(bpelURL.getFile()));
} catch (IOException e) {
e.printStackTrace();
}
// Create an initialize the BPEL implementation model
BPELImplementation implementation = bpelFactory.createBPELImplementation();
implementation.setProcessName(process);
implementation.setCompiledProcess(compiledProcess.toByteArray());
implementation.setUnresolved(false);
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && IMPLEMENTATION_BPEL.equals(reader.getName())) {
break;
}
}
return implementation;
} catch (XMLStreamException e) {
throw new ContributionReadException(e);
}
}
public void resolve(BPELImplementation impl, ModelResolver resolver) throws ContributionResolveException {
System.out.println("IN RESOLVE");
if( impl != null && impl.isUnresolved()) {
impl.setUnresolved(false);
}
}
public void write(BPELImplementation model, XMLStreamWriter outputSource) throws ContributionWriteException {
}
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);
}
}