public HashSet<Answer> readPerfectAnswersForDiagnosis(int diagnosisId) {
HashSet<Answer> answers = new HashSet<Answer>();
try {
establishConnection();
Statement stmt = connection.createStatement();
String SQL =
"SELECT answers.* FROM answers, perfect_diagnosis_diagnoses_to_answers WHERE perfect_diagnosis_diagnoses_to_answers.answer = answers.id AND perfect_diagnosis_diagnoses_to_answers.diagnosis = "
+ diagnosisId
+ ";";
ResultSet set = stmt.executeQuery(SQL);
Answer answer;
while (set.next()) {
answer = new Answer();
answer.setId(set.getInt("id"));
answers.add(answer);
}
} catch (SQLException ex) {
System.out.println("SQL Error read perfect answers of diagnosis");
}
return answers;
}
/**
* Diese Methode überprüft ob ein Dependency Loop existiert.
*
* <p>Dafür wird die Abhängigkeitskette einer Frage Rekursiv durchgegangen und die Fragen jeweils
* einem Set hinzugefügt.
*
* <p>Kommt eine Frage zwei mal vor, dann existiert ein Loop.
*
* @param question Die nächste zu überprüfende Frage
* @param previousQuestions Ein Set mit allen Bisher überprüften Fragen
* @return true fals ein Loop entsteht, false falls kein Loop entsteht
*/
private boolean hasDependencyLoop(Question question, HashSet<Question> previousQuestions) {
if (previousQuestions.contains(question)) {
return true;
}
previousQuestions.add(question);
final Answer answer = question.getDependsOn();
if (answer == null) {
return false;
} else {
Question nextQuestion = answer.getAnswerOf();
if (nextQuestion == null) {
final Answer fetchedAnswer = answerManager.get(answer.getId());
nextQuestion = fetchedAnswer.getAnswerOf();
}
return hasDependencyLoop(nextQuestion, previousQuestions);
}
}
/**
* Validates Response object.
*
* <p>Returns List of validation errors if the object is not valid. Main rules: if field is
* required, response answer on that field should not be empty, if field type is date, response
* answer on that field should match DATE_REGEX.
*
* @return List of validation errors or null if Response object is valid
*/
public List<ValidationError> validate() {
List<ValidationError> errors = new ArrayList<>();
if (answers != null) {
for (Answer answer : answers) {
if (answer.field.required && answer.isEmptyAnswer()) {
errors.add(new ValidationError(answer.field.label, "Field is required."));
}
if (answer.field.fieldType.equals(FieldType.DATE)
&& !answer.value.isEmpty()
&& !isValidDate(answer.value)) {
errors.add(
new ValidationError(
answer.field.label, "Wrong date format. Please, use yyyy-mm-dd format."));
}
}
}
return errors.isEmpty() ? null : errors;
}
@Test
public void shouldCreateAnQuestionWithAddAnswerMethod() {
assertEquals(2, User.count());
assertEquals(1, Question.count());
assertEquals(1, Answer.count());
assertNotNull(firstQuestion.answers);
assertEquals(hans, firstQuestion.answers.get(0).author);
firstQuestion.addAnswer(hans, "It is the moon.");
assertEquals("It is the moon.", firstQuestion.answers.get(1).content);
}
public int create(Answer answer, Diagnosis diagnosis) {
try {
establishConnection();
Statement stmt = connection.createStatement();
String SQL =
"SELECT id FROM perfect_diagnosis_diagnoses_to_answers WHERE answer = "
+ answer.getId()
+ " AND diagnosis = "
+ diagnosis.getId()
+ ";";
ResultSet res = stmt.executeQuery(SQL);
if (res.next()) System.out.println("Perfect diagnosis diagnoses to answers already exists!");
else {
stmt = connection.createStatement();
SQL =
"INSERT INTO perfect_diagnosis_diagnoses_to_answers (answer, diagnosis) VALUES("
+ answer.getId()
+ ", "
+ diagnosis.getId()
+ ");";
int rows = stmt.executeUpdate(SQL, Statement.RETURN_GENERATED_KEYS);
int id = 0;
if (rows > 0) {
ResultSet set = stmt.getGeneratedKeys();
if (set.next()) id = set.getInt(1);
}
return id;
}
} catch (SQLException ex) {
System.out.println("SQL Error create perfect diagnosis to answer");
}
return -1;
}
/**
* Follow notification.
*
* @param id the id of the notification.
*/
public static void followNotification(int id) {
User user = Session.user();
Notification notification = user.getNotification(id);
if (notification != null) {
notification.unsetNew();
Entry about = notification.getAbout();
if (about instanceof Answer) {
ActionDefinition action = reverse();
Answer answer = (Answer) about;
Application.question(answer.getQuestion().id());
redirect(action.addRef("answer-" + answer.id()).toString());
} else if (about instanceof Question) {
Application.question(((Question) about).id());
} else if (about instanceof Comment) {
ActionDefinition action = reverse();
Comment comment = (Comment) about;
Application.question(comment.getQuestion().id());
redirect(action.addRef("comment-" + comment.id()).toString());
}
} else if (!redirectToCallingPage()) {
Application.notifications(0);
}
}
/**
* retrieve all answers corresponding to the given poll
*
* @param poll a Poll
* @return a Collection of Answer
*/
public static List<Answer> findAnswersOfPoll(Poll poll) {
return Answer.find("poll = ? and selected = ?", poll, Boolean.TRUE).fetch();
}
@Test
public void setBestAnswerSzenario() {
User jack = new User("Jack", "*****@*****.**", "password").save();
User bill = new User("Bill", "*****@*****.**", "secret").save();
Question question = jack.addQuestion("A title", "My first question");
Answer firstAnswer = question.answer(jack, "first answer").save();
Answer secondAnswer = question.answer(bill, "second answer").save();
Answer thirdAnswer = question.answer(bill, "third answer").save();
assertFalse(firstAnswer.isBestAnswer());
assertFalse(secondAnswer.isBestAnswer());
assertFalse(thirdAnswer.isBestAnswer());
assertTrue(question.canSetBestAnswer());
assertFalse(firstAnswer.canBeBestAnswer());
assertTrue(secondAnswer.canBeBestAnswer());
assertTrue(thirdAnswer.canBeBestAnswer());
assertFalse(firstAnswer == null);
assertFalse(secondAnswer == null);
assertFalse(thirdAnswer == null);
question.setBestAnswer(secondAnswer);
assertFalse(firstAnswer.isBestAnswer());
assertTrue(secondAnswer.isBestAnswer());
assertFalse(thirdAnswer.isBestAnswer());
assertTrue(question.canSetBestAnswer());
question.resetBestAnswer();
assertFalse(firstAnswer.isBestAnswer());
assertFalse(secondAnswer.isBestAnswer());
assertFalse(thirdAnswer.isBestAnswer());
}
/**
* Gets the answers.
*
* @return the answers
*/
public List<Entry> getAnswers() {
return Answer.find("owner like ? order by timestamp desc", this).fetch();
}
/**
* Gets the number of answers.
*
* @return the number of answers
*/
public long getNumberOfAnswers() {
return Answer.count("owner = ?", this);
}
