public void expireDynamicChoices()
{
dynamicChoicesPopulated = false;
ItemsetBinding itemset = getQuestion().getDynamicChoices();
if (itemset != null)
{
itemset.clearChoices();
}
}
public List <SelectChoice> getSelectChoices()
{
QuestionDef q = getQuestion();
ItemsetBinding itemset = q.getDynamicChoices();
if (itemset != null)
{
if (!dynamicChoicesPopulated)
{
form.populateDynamicChoices(itemset, mTreeElement.getRef());
dynamicChoicesPopulated = true;
}
return(itemset.getChoices());
}
else
{ //static choices
return(q.getChoices());
}
}
//note: code overlap with FormDef.copyItemsetAnswer
public IAnswerData getAnswerValue()
{
QuestionDef q = getQuestion();
ItemsetBinding itemset = q.getDynamicChoices();
if (itemset != null)
{
if (itemset.valueRef != null)
{
List <SelectChoice> choices = getSelectChoices();
List <String> preselectedValues = new List <String>();
//determine which selections are already present in the answer
if (itemset.copyMode)
{
TreeReference destRef = itemset.getDestRef().contextualize(mTreeElement.getRef());
List <TreeReference> subNodes = form.Instance.expandReference(destRef);
for (int i = 0; i < subNodes.Count; i++)
{
TreeElement node = form.Instance.resolveReference(subNodes[i]);
String value = itemset.getRelativeValue().evalReadable(form.Instance, new EvaluationContext(form.exprEvalContext, node.getRef()));
preselectedValues.Add(value);
}
}
else
{
List <Selection> sels = new List <Selection>();
IAnswerData data = mTreeElement.getValue();
if (data is SelectMultiData)
{
sels = (List <Selection>)data.Value;
}
else if (data is SelectOneData)
{
sels = new List <Selection>();
sels.Add((Selection)data.Value);
}
for (int i = 0; i < sels.Count; i++)
{
preselectedValues.Add(sels[i].xmlValue);
}
}
//populate 'selection' with the corresponding choices (matching 'value') from the dynamic choiceset
List <Selection> selection = new List <Selection>();
for (int i = 0; i < preselectedValues.Count; i++)
{
String value = preselectedValues[i];
SelectChoice choice = null;
for (int j = 0; j < choices.Count; j++)
{
SelectChoice ch = choices[j];
if (value.Equals(ch.Value))
{
choice = ch;
break;
}
}
selection.Add(choice.selection());
}
//convert to IAnswerData
if (selection.Count == 0)
{
return(null);
}
else if (q.ControlType == Constants.CONTROL_SELECT_MULTI)
{
return(new SelectMultiData(selection));
}
else if (q.ControlType == Constants.CONTROL_SELECT_ONE)
{
return(new SelectOneData(selection[0])); //do something if more than one selected?
}
else
{
throw new SystemException("can't happen");
}
}
else
{
return(null); //cannot map up selections without <value>
}
}
else
{ //static choices
return(mTreeElement.getValue());
}
}
