public JSONObject checkTest(JSONRPC2Request req, HttpServletRequest request) throws JSONRPC2Error, Exception { JSONObject jsonResult = new JSONObject(); JSONArray jsonWrongQuestions = new JSONArray(); QuestionsList wrongQuestions = new QuestionsList(); // retrievers Map<String, Object> params = req.getNamedParams(); NamedParamsRetriever np = new NamedParamsRetriever(params); Map<String, Object> tParams = np.getMap("test"); NamedParamsRetriever testNp = new NamedParamsRetriever(tParams); // get guessed questions values QuestionsList guessQuestions = new QuestionsList(); List<Object> questions = testNp.getList("questions"); for (Object q : questions) { // set new retriever for each question NamedParamsRetriever questNp = new NamedParamsRetriever((Map<String, Object>) q); // retrieve values String answer = questNp.getString("answer"); String body = questNp.getString("body"); int id = questNp.getInt("id"); // create question with the values and add it to the guessed questions Question quest = new Question(); quest.setId(id); quest.setBody(body); quest.setAnswer(answer); guessQuestions.add(quest); } // get test int tid = testNp.getInt("id"); MySQLDAO dao = new MySQLDAO(); Test t = dao.loadTest(tid); // get true questions MySQLDAO questionsDao = new MySQLDAO(); QuestionsList trueQuestions = questionsDao.loadQuestionsByTest(tid); // cycle through questions and find these with same id for (Question tq : trueQuestions) { for (Question gq : guessQuestions) { if (tq.getId() == gq.getId()) { // if answers are different, than there is mistake System.out.println("id match!"); if (!tq.getAnswer().equals(gq.getAnswer())) { System.out.println("Wrong question!"); wrongQuestions.add(gq); } } } } jsonWrongQuestions = wrongQuestions.toJSONArray(); jsonResult.put("test", t); jsonResult.put("wrongQuestions", jsonWrongQuestions); return jsonResult; }