XtextResourceSet.getEObject(Source URI of my reference)

package A {

	Declare Property resultTable

	Property resultTable= "Table A"
	
	Rule A1 {
		// no "Property resultTable" given 
		// => fall back to nearest value in scope: "Table A"
		// scope resolution: 
		// -> Rule: no property "resultTable" defined 
		// -> contained in Package A: property "resultTable" is defined there => "Table A"
	}
	Rule A2 {
		Property resultTable= "Table A1"
		// Property "resultTable" is given, so the value "Table A" given on package level 
		// is overridden with "Table A1"
		// scope resolution: 
		// -> Rule: property "resultTable" is defined => "Table A1"
	}
}

Package A.B {
	Property resultTable= "Table A.B"
	
	Rule AB1 {
		// no "Property resultTable" given 
		// => fall back to nearest value in scope: "Table A.B"
		// scope resolution: 
		// -> Rule: no property "resultTable" defined
		// -> contained in Package A.B: property "resultTable" is defined => "Table A.B"
	}
}

Package A.C {
	
	Rule AC1 {
		// no "Property resultTable" given 
		// => fall back to nearest value in scope: "Table A"
		// scope resolution: 
		// -> Rule: no property "resultTable" defined 
		// -> contained in Package A.C: no property "resultTable" defined
		// -> contained in Package A: property "resultTable" is defined => "Table A"
	}
}

// We're looking for "Property" model elements 
EClass 	eclsElement= DqlFactory.eINSTANCE.getDqlPackage().getProperty();
		
Provider<IResourceDescriptions> provider=
	Access.getIResourceDescriptions();

Iterator<IResourceDescription> resourceDescs=
	provider.get().getAllResourceDescriptions().iterator();
while(resourceDescs.hasNext())
{
	IResourceDescription resourceDesc=
		resourceDescs.next();
	for(IReferenceDescription rd : resourceDesc.getReferenceDescriptions())
	{
// !! rd.getEReference() == null if "reference cache" has not been refreshed !!
		if(rd.getEReference() != null && eclsElement.equals(rd.getEReference().eContainer()))
		{
			EObject eProp= getResourceSet().getEObject(rd.getSourceEObjectUri(), true);
			Property e= (Property)eEigenschaft;
			// now collect the property and its value.
		}
	}
}

EObject eReferer= getResourceSet().getEObject(rd.getSourceEObjectUri(), true);
if(eclsElement.equals(eReferer.eClass())) {
	...
}

private XtextResourceSet getResourceSet()
{
	if(resourceSet == null)
		resourceSet= new XtextResourceSet();
	return resourceSet;
}

Eigenschaftsdeklaration:
	'Deklariere Eigenschaft' name=ID;

Eigenschaft:
	'Eigenschaft' eigenschaft=[Eigenschaftsdeklaration|QualifiedName] '=' wert=STRING
;
Regel :
	'Regel' name=ID '{'

		// Optionale Auflistung von Eigenschaften.		
		(properties+=Eigenschaft)*

	'}';

	public List<Eigenschaft> getProperties(Regel regel) {

		System.out.println("Regel " + regel.getName());
		
		// Alle Eigenschaften aus dem umgebenden Scope einsammeln.
		PackageDeclaration regelPackage= (PackageDeclaration)regel.eContainer();
		String regelPackageName= regelPackage.getName();
		
		
		Provider<IResourceDescriptions> provider=
			Access.getIResourceDescriptions();
		provider.get().getAllResourceDescriptions();
		
		

		Iterator<IResourceDescription> resourceDescs=
			provider.get().getAllResourceDescriptions().iterator();
		while(resourceDescs.hasNext())
		{
			IResourceDescription resourceDesc=
				resourceDescs.next();

			// Debug resolution of reference
			/*
			 * Die TargetURI zeigt auf die Eigenschaftsdeklaration, die zufällig
			 * in der gleichen Resource steht. 
			 * Wenn man den gesamten Cache durchsucht:
			 * 		a) Passende ResourceDescription finden:
			 * 				resourceDec.uri == targetEObj.uri."resourceUri()"
			 * 		b) In dieser ResourceDescription dann die exportierte EObjectDescription finden, die zur EObj-URI passt:
			 * 				eObjDesc.eFragment = targetEObj.uri.fragment()
			 * 		Wann diese eObjDesc dann eine EigenschaftsDeklaration ist, sollten wir die Referenz auflösen. 
			 *  
			 */
			
			
			/* -------------------------------- */
			if(resourceDesc.getURI().toString().contains("eigenschaften.dql")) {
				System.out.println("Eigenschaften: " + resourceDesc.getURI().toString());
				
				for(IReferenceDescription rd : resourceDesc.getReferenceDescriptions()) {
					
					Eigenschaft e= null;
					if(rd.getEReference() == null) {
						
						
						System.out.println(rd.getSourceEObjectUri());	// platform:/resource/DQ-DM-Doc/moVe/eigenschaften.dql#//@elements.0/@elements.1
						System.out.println(rd.getTargetEObjectUri());	// platform:/resource/DQ-DM-Doc/moVe/eigenschaften.dql#//@elements.0/@elements.0
						URI uri= rd.getSourceEObjectUri();
						
						System.out.println(uri.fragment());				// 	//@elements.0/@elements.1
						System.out.println(uri.path());					//	/resource/DQ-DM-Doc/moVe/eigenschaften.dql
						System.out.println(uri.scheme());				//	platform
						System.out.println(uri.toPlatformString(false));	//	/DQ-DM-Doc/moVe/eigenschaften.dql
						System.out.println(uri.toPlatformString(true));		//	/DQ-DM-Doc/moVe/eigenschaften.dql
						
						System.out.println(resourceDesc.getURI());		//	platform:/resource/DQ-DM-Doc/moVe/eigenschaften.dql
						
						for(IEObjectDescription ied : resourceDesc.getExportedObjects()) {
							System.out.println(ied.getName());
							System.out.println(ied.getEClass());
							System.out.println(ied.getEObjectURI());
							System.out.println(ied.getEObjectOrProxy());
							
							if(ied.getEObjectURI().equals(rd.getTargetEObjectUri())) {
								System.out.println(ied.getName());			// move.ErgebnisRelevanz
								System.out.println(ied.getEClass());		// org.eclipse.emf.ecore.impl.EClassImpl@7804a579 (name: Eigenschaftsdeklaration) (instanceClassName: null) (abstract: false, interface: false)
								System.out.println(ied.getEObjectURI());	// platform:/resource/DQ-DM-Doc/moVe/eigenschaften.dql#//@elements.0/@elements.0
							}
						}
						/*
						Iterator<IResourceDescription> rds=
							provider.get().getAllResourceDescriptions().iterator();
						while (rds.hasNext()) {
							IResourceDescription r
						}
						*/
						
						/*
							Funktioniert nicht
						IResourceDescription resDesc= provider.get().getResourceDescription(rd.getSourceEObjectUri());
						for(IEObjectDescription objDesc : resDesc.getExportedObjects()) {
							System.out.println(objDesc.getName());
						}
						*/
						
						EObject eReferer= getResourceSet().getEObject(rd.getSourceEObjectUri(), true);
						if(eclsElement.equals(eReferer.eClass())) {
							e= (Eigenschaft)eReferer;
						}
					} 
					else if(eclsElement.equals(rd.getEReference().eContainer())) {
						EObject eReferer= getResourceSet().getEObject(rd.getSourceEObjectUri(), true);						
						e= (Eigenschaft)eReferer;
					}
					if(e != null) {
						System.out.println("Eigenschaft: " + e.getEigenschaft().getName() + "= " + e.getWert()); 						
					}
				}
			}
			/* -------------------------------- */
			
			for(IReferenceDescription rd : resourceDesc.getReferenceDescriptions())
			{
				// rd.getEReference().getEType()		// EClass name: Eigenschaftsdeklaration 
				// rd.getEReference().eContainer()		// EClass name: Eigenschaft
				// System.out.println(rd.getEReference().getEReferenceType());		
				// System.out.println(rd.getEReference().getEReferenceType().getName());
				
				
				Eigenschaft e= null;
				if(rd.getEReference() == null) {
					// slow
					EObject eReferer= getResourceSet().getEObject(rd.getSourceEObjectUri(), true);
					if(eclsElement.equals(eReferer.eClass())) {
						e= (Eigenschaft)eReferer;
					}
				} 
				else if(eclsElement.equals(rd.getEReference().eContainer())) {
					// quick
					EObject eReferer= getResourceSet().getEObject(rd.getSourceEObjectUri(), true);						
					e= (Eigenschaft)eReferer;
				}
				if(e != null) {
					/*
					if(eReferer.eIsProxy()) {
						eReferer= EcoreUtil.resolve(eReferer, eReferer.eResource());
					}
					*/
					System.out.println("Eigenschaft: " + e.getEigenschaft().getName() + "= " + e.getWert()); 						
					collectEigenschaft(regelPackageName, e);
				}
			}
		}
		
		// Eigene Eigenschaften überschreiben ggf vorher eingesammlte Eigenschaften
		for(Eigenschaft regelEigenschaft : regel.getProperties())
		{
			name2Prop.put(regelEigenschaft.getEigenschaft().getName(), regelEigenschaft);
		}

		// Sortiere nach Eigenschaftsname
		List<Eigenschaft> scopedEigenschaften= new ArrayList<Eigenschaft>(name2Prop.values());
		Collections.sort(
				scopedEigenschaften, 
				new Comparator<Eigenschaft>() {
					@Override
					public int compare(Eigenschaft a, Eigenschaft b) {
						return CollectorUtil.qualifiedName(a.getEigenschaft()).compareTo(
								CollectorUtil.qualifiedName(b.getEigenschaft()));
					}
				}
		);
		
		return scopedEigenschaften;
	}