#vulnerable code 
                             @Override
	public void visit(ClassOrInterfaceDeclaration n, GenerationContext context) {
		printComments(n, context);

		ClassScope scope = (ClassScope) scope(n);
		
		if (resolvedType(n) == null) {
			// for anonymous object creation the type is set already
			resolvedType(n, scope.resolveType(n.getName()).getType());
		}

		ClassWrapper type = (ClassWrapper)resolvedType(n);
		String namespace = null;

		if (ClassUtils.isRootType(type)) {
			namespace = ClassUtils.getNamespace(type);
			if (namespace != null) {
				printer.printLn("stjs.ns(\"" + namespace + "\");");
			}
		}

		String className = null;
		if(!type.isAnonymousClass()){
			if(!type.isInnerType() && !type.isAnonymousClass() && namespace == null){
				printer.print("var ");
			}
			className = names.getTypeName(type);
			if(type.isInnerType()){
				printer.print("constructor.");
				printer.print(type.getSimpleName());
			} else {
				className = names.getTypeName(type);
				printer.print(className);
			}
			printer.print(" = ");
			printConstructorImplementation(n, context, scope, type.isAnonymousClass());
			printer.printLn(";");
		}else{
			printer.print("(");
		}
		
		printer.print("stjs.extend(");
		if(type.isAnonymousClass()){
			printConstructorImplementation(n, context, scope, type.isAnonymousClass());
		}else{
			printer.print(className);
		}
		printer.print(", ");
		
		// print the super class
		List<TypeWrapper> interfaces;
		if(n.isInterface()){
			// interfaces do not have super classes. For interfaces, extends actually means implements
			printer.print("null, ");
			interfaces = getExtends(n);
		} else {
			List<TypeWrapper> superClass = getExtends(n);
			if(superClass.size() > 0){
				printer.print(names.getTypeName(superClass.get(0)));
			}else{
				printer.print("null");
			}
			printer.print(", ");
			interfaces = getImplements(n);
		}
		
		// print the implemented interfaces
		printer.print("[");
		for (int i = 0; i < interfaces.size(); i ++) {
			if(i > 0){
				printer.print(", ");
			}
			printer.print(names.getTypeName(interfaces.get(i)));
		}
		printer.print("], ");
	
		printMembers(n.getMembers(), context);
		printer.print(", ");
		printTypeDescription(n, context);
		printer.print(")");
		
		if(!type.isAnonymousClass()){
			printer.printLn(";");
			if(!type.isInnerType()){
				printGlobals(filterGlobals(n, type), context);
				printStaticInitializers(n, context);
				printMainMethodCall(n, type);
			}
		}else {
			printer.print(")");
		}
	} 
                            #location 33 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             @Override
	public void visit(ClassOrInterfaceDeclaration n, GenerationContext context) {
		printComments(n, context);

		ClassScope scope = (ClassScope) scope(n);
		
		if (resolvedType(n) == null) {
			// for anonymous object creation the type is set already
			resolvedType(n, scope.resolveType(n.getName()).getType());
		}

		ClassWrapper type = (ClassWrapper)resolvedType(n);
		String namespace = null;

		if (ClassUtils.isRootType(type)) {
			namespace = ClassUtils.getNamespace(type);
			if (namespace != null) {
				printer.printLn("stjs.ns(\"" + namespace + "\");");
			}
		}

		String className = null;
		if(!type.isAnonymousClass()){
			if(!type.isInnerType() && !type.isAnonymousClass() && namespace == null){
				printer.print("var ");
			}
			className = names.getTypeName(type);
			if(type.isInnerType()){
				printer.print("constructor.");
				printer.print(type.getSimpleName());
			} else {
				className = names.getTypeName(type);
				printer.print(className);
			}
			printer.print(" = ");
			if(!type.hasAnonymousDeclaringClass()){
				printConstructorImplementation(n, context, scope, type.isAnonymousClass());
				printer.printLn(";");
			}
		}else{
			printer.print("(");
		}
		
		printer.print("stjs.extend(");
		if(type.isAnonymousClass() || type.hasAnonymousDeclaringClass()){
			printConstructorImplementation(n, context, scope, type.isAnonymousClass());
		}else{
			printer.print(className);
		}
		printer.print(", ");
		
		// print the super class
		List<TypeWrapper> interfaces;
		if(n.isInterface()){
			// interfaces do not have super classes. For interfaces, extends actually means implements
			printer.print("null, ");
			interfaces = getExtends(n);
		} else {
			List<TypeWrapper> superClass = getExtends(n);
			if(superClass.size() > 0){
				printer.print(names.getTypeName(superClass.get(0)));
			}else{
				printer.print("null");
			}
			printer.print(", ");
			interfaces = getImplements(n);
		}
		
		// print the implemented interfaces
		printer.print("[");
		for (int i = 0; i < interfaces.size(); i ++) {
			if(i > 0){
				printer.print(", ");
			}
			printer.print(names.getTypeName(interfaces.get(i)));
		}
		printer.print("], ");
	
		printMembers(n.getMembers(), context);
		printer.print(", ");
		printTypeDescription(n, context);
		printer.print(")");
		
		if(!type.isAnonymousClass()){
			printer.printLn(";");
			if(!type.isInnerType()){
				printGlobals(filterGlobals(n, type), context);
				printStaticInitializers(n, context);
				printMainMethodCall(n, type);
			}
		}else {
			printer.print(")");
		}
	}