@Override
public void swapQuestionPosition(Question questionToSwap, List<Question> questions, boolean up) {
Connection conn = null;
PreparedStatement stat = null;
ResultSet res = null;
Question nearQuestionToSwap = null;
try {
for (int i = 0; i < questions.size(); i++) {
Question question = questions.get(i);
if (question.getId() == questionToSwap.getId()) {
if (up && i > 0) {
nearQuestionToSwap = questions.get(i - 1);
} else if (!up && i < (questions.size() - 1)) {
nearQuestionToSwap = questions.get(i + 1);
}
break;
}
}
if (null == nearQuestionToSwap) {
return;
}
conn = this.getConnection();
conn.setAutoCommit(false);
int initPos = questionToSwap.getPos();
questionToSwap.setPos(nearQuestionToSwap.getPos());
nearQuestionToSwap.setPos(initPos);
this.updateQuestionPosition(conn, nearQuestionToSwap);
this.updateQuestionPosition(conn, questionToSwap);
conn.commit();
} catch (Throwable t) {
this.executeRollback(conn);
_logger.error("Errore swapping position of two 'choice' objects", t);
throw new RuntimeException("Errore swapping position of two 'choice' objects", t);
} finally {
closeDaoResources(res, stat, conn);
}
}
private void updateQuestionPosition(Connection conn, Question questionToMove) {
PreparedStatement stat = null;
try {
stat = conn.prepareStatement(MOVE_QUESTION);
stat.setInt(1, questionToMove.getPos());
stat.setInt(2, questionToMove.getId());
stat.executeUpdate();
} catch (Throwable t) {
this.executeRollback(conn);
_logger.error("Error while updating the position of question", t);
throw new RuntimeException("Error while updating the position of question", t);
} finally {
closeDaoResources(null, stat);
}
}