public static MethodDescriptor convertJsonDescriptor(MethodDescriptor oldDesc, Class req, Class res){ MethodDescriptor.Marshaller reqMarshaller = getJsonMarshaller(req); MethodDescriptor.Marshaller resMarshaller = getJsonMarshaller(res); if(reqMarshaller != null && resMarshaller != null){ return MethodDescriptor.create(oldDesc.getType(), oldDesc.getFullMethodName(), reqMarshaller, resMarshaller); } return null; }