[news.eclipse.tools.emf] Issues with dynamic Ecore

[Eike Stepper <stepper@xxxxxxxxxxx>]

Hi,

I have an Ecore model with an EClass named "Category". I'm trying to 
load it into a ResourceSet which has a specially configured package 
registry. Instead of the global package registry I use one that contains 
an Ecore package that was dynamically loaded from the file Ecore.ecore. 
Also the factory instance of the dynamic Ecore package is overridden.

Originally i used the following override:

 @Override
 protected EObject basicCreate(EClass eClass)
 {
   return new DynamicCDOObjectImpl(eClass);
 }

But the code in EFactoryImpl.create(EClass eClass) showed strange 
behaviour because it somehow detected non-null instanceClass settings. 
These resulted from a generatedInstanceClassName being set through some 
magic. Do you have an idea where this setting comes from?

So I used the follwing override instead:

 @Override
 public EObject create(EClass eClass)
 {
   return new DynamicCDOObjectImpl(eClass);
 }

Now the following exception occurs when I load the model with the 
"Category" class:

Exception in thread "main" java.lang.IllegalArgumentException: The 
feature 'ategory' is not a valid feature
   at 
org.eclipse.emf.ecore.impl.BasicEObjectImpl.eStructuralFeature(BasicEObjectImpl.java:730)
   at 
org.eclipse.emf.ecore.impl.BasicEObjectImpl.eObjectForURIFragmentSegment(BasicEObjectImpl.java:548)
   at 
org.eclipse.emf.ecore.resource.impl.ResourceImpl.getEObject(ResourceImpl.java:758)
   at 
org.eclipse.emf.ecore.resource.impl.ResourceImpl.getEObject(ResourceImpl.java:734)
   at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.setValueFromId(XMLHandler.java:2662)
   at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.setAttribValue(XMLHandler.java:2582)
   at 
org.eclipse.emf.ecore.xmi.impl.SAXXMIHandler.handleObjectAttribs(SAXXMIHandler.java:76)
   at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.createObjectFromFactory(XMLHandler.java:2058)
   at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.createObjectFromTypeName(XMLHandler.java:1961)
   at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.createObject(XMLHandler.java:1896)
   at 
org.eclipse.emf.ecore.xmi.impl.XMIHandler.createObject(XMIHandler.java:131)
   at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.handleFeature(XMLHandler.java:1705)
   at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.processElement(XMLHandler.java:974)
   at 
org.eclipse.emf.ecore.xmi.impl.XMIHandler.processElement(XMIHandler.java:87)
   at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.startElement(XMLHandler.java:953)
   at 
org.eclipse.emf.ecore.xmi.impl.XMLHandler.startElement(XMLHandler.java:684)
   at 
org.eclipse.emf.ecore.xmi.impl.XMIHandler.startElement(XMIHandler.java:167)
   at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:533)
   at 
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:220)
   at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:872)
   at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1693)
   at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
   at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
   at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
   at 
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
   at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
   at javax.xml.parsers.SAXParser.parse(SAXParser.java:375)
   at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:179)
   at 
org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl.doLoad(XMLResourceImpl.java:180)
   at 
org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1354)
   at 
org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1155)
   at 
org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoad(ResourceSetImpl.java:256)
   at 
org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoadHelper(ResourceSetImpl.java:271)
   at 
org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getResource(ResourceSetImpl.java:398)
   at 
org.eclipse.emf.cdo.tests.tdd.DymamicEcoreTest.loadModel(DymamicEcoreTest.java:76)
   at 
org.eclipse.emf.cdo.tests.tdd.DymamicEcoreTest.testDynamicEcore(DymamicEcoreTest.java:46)

I don't understand this. Any idea?

Cheers
/Eike