private void populateResponses() throws SurveyException {
Interpreter interpreter = new Interpreter(survey);
do {
Question q = interpreter.getNextQuestion();
SurveyDatum[] c = q.getOptListByIndex();
List<SurveyDatum> answers = new ArrayList<>();
// calculate our answer
if (q.freetext) {
answers.add(new StringDatum(generateStringComponent(q), -1, -1));
} else {
int denom = getDenominator(q);
double prob = rng.nextDouble();
double cumulativeProb = 0.0;
for (int j = 0; j < denom; j++) {
assert posPref.get(q).length == denom
: String.format(
"Expected position preference question options and denom to be equal (%d = %d)",
posPref.get(q).length, denom);
cumulativeProb += posPref.get(q)[j];
if (prob < cumulativeProb) {
answers.addAll(selectOptions(j, c));
break;
}
}
}
interpreter.answer(q, answers);
} while (!interpreter.terminated());
this.response = interpreter.getResponse();
this.response.setKnownValidityStatus(KnownValidityStatus.NO);
}
