Home » Modeling » ATL » Model injection of a registered XML/XSD model
| Model injection of a registered XML/XSD model [message #1271242] |
Fri, 14 March 2014 16:08  |
 Mathias K
Messages: 16
Registered: March 2014 |
Junior Member |
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Hello,
I am trying to programatically run an ATL transformation where one of the injected models is defined by XML/XSD, but it seems the model is not correctly injected by ATL.
If I define and load an EMF plugin that has the corresponding XSD2Ecore mapping, the transformation goes fine. However I want to run the transformation without the plugin available, i.e programatically mimic what the EMF plugin is doing.
From what I understand so far, these are my steps :
- Build the EPackage from the XSD using XSDEcoreBuilder
- Register the package in the model factory registry
- Use that model factory to create ReferenceModel, Model and injections
Although registrations/injections seem to go fine, the ATL transformation launcher raises an exception about missing class in the reference model.
Remarks before I enter into the code:
- the XSDEcoreBuilder changes class names by adding Type to each of them (e.g. MyClass->MyClassType) so I use those modified names in the transformation (though I'd prefer not to). I have tried old names and it doesn't change the behaviour.
- After registrations, I can programatically load the XML resource and navigate into it using EMF without problems. I find the expected classes. I looked at how ATL implements the injections (IInjector) and tried to mimic it in my "manual" EMF loading to see if I could reproduce the ATL error but it works fine.
- I tried to use the global registry instead of the factory local one without success.
- I know there is a potential workaround: directly passing the EMF loaded resource to ATL, but I would like to avoid that if possible.
Attached is a set of sample files for checking/testing: a sample ATL A2B, sample XML/XSD (A: inputs), sample XMI/Ecore (B: outputs), java code for testing.
Below is the java code for the tests, then the debug output and the ATL launch error:
Code:
public class TestATLXML {
public static void main(String[] args) {
try {
IPath inputMMPath = new Path("files/A.xsd");
IPath inputMPath = new Path("files/A-XSD.xml");
String inputMMName = "A";
IPath outputMMPath = new Path("files/B.ecore");
IPath outputMPath = new Path("files/B-XSD.xmi");
String outputMMName = "B";
IPath asmPath = new Path("files/A2B.asm");
//Initializations
ILauncher transformationLauncher = new EMFVMLauncher();
EMFModelFactory modelFactory = new EMFModelFactory();
IInjector injector = new EMFInjector();
IExtractor extractor = new EMFExtractor();
transformationLauncher.initialize(new HashMap<String,Object>());
// input
registerXSD(modelFactory,inputMMPath);
testEMFLoad(modelFactory, inputMPath);
IReferenceModel inputMM = modelFactory.newReferenceModel();
injector.inject(inputMM, URI.createFileURI(inputMMPath.toString()).toString());
IModel inputM = modelFactory.newModel(inputMM);
injector.inject(inputM, URI.createFileURI(inputMPath.toString()).toString());
transformationLauncher.addInModel(inputM, "IN", inputMMName);
// output
IReferenceModel outputMM = modelFactory.newReferenceModel();
injector.inject(outputMM, URI.createFileURI(outputMMPath.toString()).toString());
IModel outputM = modelFactory.newModel(outputMM);
transformationLauncher.addOutModel(outputM, "OUT", outputMMName);
// transformation
transformationLauncher.launch(ILauncher.RUN_MODE, new NullProgressMonitor(), new HashMap<String,Object>(),
new FileInputStream(asmPath.toOSString()));
// extract results
extractor.extract(outputM, URI.createFileURI(outputMPath.toString()).toString());
}
catch (ATLCoreException e) {
e.printStackTrace();
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
catch (ATLExecutionException e) {
e.printStackTrace();
}
}
private static void registerXSD(EMFModelFactory modelFactory, IPath XSD) throws IOException {
//local registry
ResourceSet resourceSet = modelFactory.getResourceSet();
resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put( "xsd",
new XSDResourceFactoryImpl());
resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put( "xml",
new XMLResourceFactoryImpl());
// global registry
//ResourceSet resourceSet = new ResourceSetImpl();
//Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put("xsd",
//new XMLResourceFactoryImpl());
//Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put("xml",
//new XMLResourceFactoryImpl());
XSDEcoreBuilder xsdEcoreBuilder = new XSDEcoreBuilder();
Collection<EObject> loaded = xsdEcoreBuilder.generate(URI.createFileURI(XSD.toOSString()));
for (Object loadedObject : loaded) {
if (loadedObject instanceof EPackage) {
//Resource.Factory.Registry.INSTANCE.
resourceSet.getPackageRegistry().put(((EPackage) loadedObject).getNsURI(), (EPackage) loadedObject);
// for xml with missing namespace and schema location
resourceSet.getPackageRegistry().put(null, (EPackage) loadedObject);
System.out.println("registerXSD: an EPackage in the input: " + ((EPackage) loadedObject).getNsURI());
} else {
final String typeInfo = (loadedObject == null)?
"N/A" : loadedObject.getClass().getName();
System.out.println("registerXSD: A non-EPackage in the input: " + typeInfo);
}
}
}
private static void testEMFLoad(EMFModelFactory modelFactory, IPath XML) {
// get factory resource set
ResourceSet resourceSet = modelFactory.getResourceSet();
// Not sure how these loading options should be set
Map options = resourceSet.getLoadOptions();
final ExtendedMetaData extendedMetaData = new BasicExtendedMetaData(resourceSet.getPackageRegistry());
options.put(XMLResource.OPTION_EXTENDED_META_DATA, extendedMetaData);
options.put(XMLResource.OPTION_RECORD_UNKNOWN_FEATURE, Boolean.TRUE);
// get resource
Resource resource = resourceSet.getResource(URI.createFileURI(XML.toOSString()), true);
// get & output root element name
EObject object = (EObject) resource.getContents().get(0);
System.out.println(object.eClass().toString());
// get & output root's first contained element
System.out.println(object.eContents().get(0).toString());
}
}
Output:
registerXSD: an EPackage in the input: files/A.xsd
org.eclipse.emf.ecore.impl.EClassImpl@aa8837c (name: DocumentRoot) (instanceClassName: null) (abstract: false, interface: false)
org.eclipse.emf.ecore.impl.DynamicEObjectImpl@5606b5d8 (eClass: org.eclipse.emf.ecore.impl.EClassImpl@69d2bdc3 (name: AType) (instanceClassName: null) (abstract: false, interface: false))
org.eclipse.m2m.atl.engine.emfvm.VMException: Cannot find class AType in reference model A
at __matchA2B#2(A2B.atl)
local variables: self=A2B : ASMModule
at __matcher__#1(A2B.atl)
local variables: self=A2B : ASMModule
at main#22(A2B.atl)
local variables: self=A2B : ASMModule
That'(s about it. I know I'm missing something but I can't find it. Any help appreciated.
Regards,
Mathias
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