Re: Help with Dynamic Number of Form Elements

[Lance Java]

Lets assume your application looks like this:

public class QuestionAndAnswers {
   private Question question;
   private List<Answer> possibleAnswers;
}

public class AnsweredQuestion {
   private Question question;
   private Answer answer;
}

public interface WebService {
   public List<QuestionAndAnswers> getQuiz(String quizId);
}

I think I'd do it like this

public class Page {
   @Inject
   private WebService webService;

   @Property
   private List<AnsweredQuestion> answeredQuestions;

   @Property
   private AnsweredQuestion current;

   private Map<Question, List&lt;Answer>> answerMap;

   public SelectModel getSelectModel() {
      List<Answer> possibleAnswers = answerMap.get(current);
      return createSelectModel(possibleAnswers);
   }

   public ValueEncoder<AnsweredQuestion> getEncoder() {
      // this will be used to serialize/deserialize each value to a hidden
value in the form
   }

   public void onPrepareRender() {
      List<QuestionAndAnswers> qsAndAs = webService.getQuiz(String quizId);
      // initialize answeredQuestions
      // initialize answerMap
   }
}

tml
<t:loop source="answeredQuestions" value="current" encoder="encoder">
   ${current.question.question}
   <t:select value="current.answer" model="selectModel" />
</t:loop>

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