@Override protected void setDefaultValueImpl(EObject obj, EReference ref, IDiagnosticProducer producer) { if (XtextPackage.eINSTANCE.getTypeRef_Metamodel() == ref) { final TypeRef typeRef = (TypeRef) obj; final String typeRefName = GrammarUtil.getTypeRefName(typeRef); final List<EObject> metamodels = XtextMetamodelReferenceHelper.findBestMetamodelForType(typeRef, "", typeRefName, scopeProvider.getScope(typeRef, ref)); if (metamodels.isEmpty() || metamodels.size() > 1) producer.addDiagnostic(new DiagnosticMessage("Cannot find meta model for type '" + typeRefName + "'", Severity.ERROR, null)); else typeRef.setMetamodel((AbstractMetamodelDeclaration) metamodels.get(0)); } else if (XtextPackage.eINSTANCE.getCrossReference_Terminal() == ref) { AbstractRule rule = GrammarUtil.findRuleForName(GrammarUtil.getGrammar(obj), "ID"); if (rule == null) producer.addDiagnostic(new DiagnosticMessage("Cannot resolve implicit reference to rule 'ID'", Severity.ERROR, null)); else { RuleCall call = XtextFactory.eINSTANCE.createRuleCall(); call.setRule(rule); ((CrossReference) obj).setTerminal(call); } } else { super.setDefaultValueImpl(obj, ref, producer); } }