/**
* Gets list of all acceptable cardinalities for this expression from its parent.
*
* <ol>
* <li>evaluates index of this expression in parent
* <li>calls parent's <code>getRequiredCardinalities(index)</code> method
* </ol>
*
* If this expression doesn't have any parent (it is legal for testing, but not for real use
* case), returns list of all cardinalities.
*
* @param context TODO
* @return list of all acceptable cardinalities for this expression from its parent
*/
protected final Cardinality[] getParentRequiredCardinalities(final ValidationContext context) {
if (getParent() != null) {
final int index =
getParent()
.getNodeGroups()
.getGroupSupporting(getQtiClassName())
.getChildren()
.indexOf(this);
return getParent().getRequiredCardinalities(context, index);
}
return Cardinality.values();
}
