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Re: [mmt-dev] AST Creation of QVT-O
Sorry for creating an entry here, I started a new thread at

Nonetheless, I attached the Eclipse project including a launch configuration as you have requested.

Thanks & regards
Sebastian


Attachment: QVTo2AST-Test.zip
Description: Zip archive




Am 28.07.2012 um 12:00 schrieb Ed Willink:

Hi

Please use the QVTo newsgroup for user problems.

I'm sorry. I don't have time to figure out how your Java fits in to the rest of your code. If you want me to look at it, provide a zipped project, including a launch configuration that can just be run directly in debug to show the problem.

    Regards

        Ed Willink

On 28/07/2012 09:54, Sebastian Lehrig wrote:
Hello,

similar to the approach discussed here ( http://dev.eclipse.org/mhonarc/lists/m2m-dev/msg00265.html ) I want to create an AST of my QVT-O scripts and to store it as an XMI file. I am already able to create the XMI file, however, when trying to open certain elements of the file, I get exceptions of the form "java.net.UnknownHostException: m2m.upb.de".

Have you any idea why this happens? (see the code and the attached models below)

Thank you and best regards
Sebastian


1) This is the code for parsing the QVT-O scripts:
-----------------------------------------------------------------
URI transformationURI = URI.createFileURI(myQVTOScriptURI.toString());

// load metamodels from QVT Operational's metamodel mapping registry (project specific)
EPackage.Registry registry = new EPackageRegistryImpl(EPackage.Registry.INSTANCE);
// TODO Remove hard-coded project reference "de.upb.m2m.quality.casestudies" to something generic ;)
IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject("de.upb.m2m.quality.casestudies");
try {
	MappingContainer uriMap = MetamodelURIMappingHelper.loadMappings(project);
	for(URIMapping mapping : uriMap.getMapping())
	{
		ResourceSet rs = new ResourceSetImpl();
		EPackage modelPackage = (EPackage) rs.getResource(URI.createURI(mapping.getTargetURI()), true).getContents().get(0);
		registry.put(modelPackage.getNsURI(), modelPackage);
	}
} catch (IOException e) {
	System.err.println("Unable to load models from QVT Operational's metamodel mapping registry!");
}

// Load qvto transformation from file.
// That transformation can import other transformation files.
InternalTransformationExecutor executor = new InternalTransformationExecutor(transformationURI, registry);
Diagnostic diag = executor.loadTransformation();
if (diag.getSeverity() == Diagnostic.ERROR || diag.getSeverity() == Diagnostic.CANCEL) {
	System.err.println(diag);
	return;
}

// Obtain transformation object.
// Note that we receive abstract type 'Module' since actual object type 
// is an instance of 'OperationalTransformation' or 'Library'
CompiledUnit unit = executor.getUnit();
org.eclipse.m2m.internal.qvt.oml.expressions.Module module = unit.getModules().get(0);

2) This is the code for saving to XMI:
-------------------------------------------------
// Save compiled transformation
try {
	ExeXMISerializer.saveUnitXMI(new CompiledUnit[] {unit}, registry);
	// don't forget about imported transformations/libraries
	for (CompiledUnit importUnit : unit.getCompiledImports()) {
   	ExeXMISerializer.saveUnitXMI(new CompiledUnit[] {importUnit}, registry);
	}
} catch (IOException e) {
	System.err.println("Parser error: could not save with ExeXMISerializer!");
}

// move compiled "qvtox" file to target location
URI xmiQvtoURI = ExeXMISerializer.toXMIUnitURI(transformationURI);
File source = new File(xmiQvtoURI.toFileString());
File target = new File(xmiURI.toFileString());
if(target.exists()) target.delete();
try {
	FileUtils.moveFile(source, target);
	System.out.println("Saved "+target.toString());
} catch (IOException e) {
	System.err.println("Unable to move "+source.toString()+" to "+target.toString()+":\n"+e);
}

3) This is the code for dynamically loading the XMI file:
--------------------------------------------------------------------------

// Load serialized transformation
CompiledUnit loadedUnit = null;
if (URIConverter.INSTANCE.exists(xmiQvtoURI, null)) {
	// check if the bin XMI is up-to-date with the QVT source file
   Long srcTStamp = (Long)URIConverter.INSTANCE.getAttributes(transformationURI, null).get(URIConverter.ATTRIBUTE_TIME_STAMP);
	Long binTStamp = (Long)URIConverter.INSTANCE.getAttributes(xmiQvtoURI, null).get(URIConverter.ATTRIBUTE_TIME_STAMP);
	if (binTStamp == null || (srcTStamp != null && binTStamp.equals(srcTStamp))) {
		// all imports will loaded automatically
		loadedUnit = new CompiledUnit(xmiQvtoURI, CompiledUnit.createResourceSet());        		
	}
}
if(loadedUnit == null)
{
	System.err.println("Parser error: loadedUnit is null!");
}

4) Files attached: 
------------------------
- QVT-O Script "uml2rdbms.qvto"
- QVT-O Script XMI Output "uml2rdbms.qvto.xmi"
- source MetaModel "simpleUML.ecore"
- target MetaModel "simpleRDBMS.ecore"
- example source Model "simpleUML.xmi"
- example target Model "simpleRDBMS.xmi"





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