/**
* Identify the itemset in the backend model, and create a set of SelectChoice objects at the
* current question reference based on the data in the model.
*
* <p>Will modify the itemset binding to contain the relevant choices
*
* @param itemset The binding for an itemset, where the choices will be populated
* @param curQRef A reference to the current question's element, which will be used to determine
* the values to be chosen from.
*/
public void populateDynamicChoices(ItemsetBinding itemset, TreeReference curQRef) {
Vector<SelectChoice> choices = new Vector<SelectChoice>();
Vector<TreeReference> matches =
itemset.nodesetExpr.evalNodeset(
this.getInstance(),
new EvaluationContext(exprEvalContext, itemset.contextRef.contextualize(curQRef)));
for (int i = 0; i < matches.size(); i++) {
TreeReference item = matches.elementAt(i);
String label =
itemset.labelExpr.evalReadable(
this.getInstance(), new EvaluationContext(exprEvalContext, item));
String value = null;
TreeElement copyNode = null;
if (itemset.copyMode) {
copyNode = this.getInstance().resolveReference(itemset.copyRef.contextualize(item));
}
if (itemset.valueRef != null) {
value =
itemset.valueExpr.evalReadable(
this.getInstance(), new EvaluationContext(exprEvalContext, item));
}
// SelectChoice choice = new SelectChoice(labelID,labelInnerText,value,isLocalizable);
SelectChoice choice =
new SelectChoice(label, value != null ? value : "dynamic:" + i, itemset.labelIsItext);
choice.setIndex(i);
if (itemset.copyMode) choice.copyNode = copyNode;
choices.addElement(choice);
}
if (choices.size() == 0) {
throw new RuntimeException(
"dynamic select question has no choices! [" + itemset.nodesetRef + "]");
}
itemset.setChoices(choices, this.getLocalizer());
}
