Hello All,
I have been trying to design functionality of a webapp using wizard.
I need to pass a object (Questionnaire) to the wizard page, the object contains
a set of questions.
on passing the object, when I try to pick the set of questions using q.getqn()
where q is the object, a null set is returned and I get a error saying:
LazyInitializationException:19 - failed to lazily initialize a collection of
role: questionnaire.model.Questionnaire.qn, no session or session was closed
I have searched and found lots of articles about this error but I guess my
programming is still imature cause I seem not to get this to work yet.
Below is my code is there a way of passing the previous session to this class.
public final class AnswerWizard extends Wizard {
public AnswerWizard(String id, Questionnaire q) {
super(id);
// create a model with a couple of custom panels
// still not that spectacular, but at least it
// will give you a hint of how nice it is to
// be able to work with custom panels
WizardModel model = new WizardModel();
Set questions = q.getQn();
Iterator iter = questions.iterator();
System.out.println("Testing55: " );
for (;iter.hasNext();) {
Question qn = (Question) iter.next();
if (qn instanceof QuestionShortAns) {
model.add(new StepQSA((QuestionShortAns) qn));
} else if (qn instanceof QuestionSingleSelect) {
model.add(new StepQSS((QuestionSingleSelect) qn));
} else if (qn instanceof QuestionMatch) {
model.add(new StepQm((QuestionMatch) qn));
}
}
// initialize the wizard
init(model);
}
private static final class StepQSS extends WizardStep {
/**
* Construct.
*/
public StepQSS(QuestionSingleSelect qn) {
super("One", "The first step");
}
}
private static final class StepQSA extends WizardStep {
/**
* Construct.
*/
public StepQSA(QuestionShortAns qn) {
super("Two", "The second step");
}
}
private static final class StepQm extends WizardStep {
/**
* Construct.
*/
public StepQm(QuestionMatch qn) {
super("Three", "The third step");
}
}
public void onCancel() {
//setResponsePage(Index.class);
}
/**
* @see org.apache.wicket.extensions.wizard.Wizard#onFinish()
*/
public void onFinish() {
// setResponsePage(Index.class);
}
}
Any Help will be highly appreciated
