/**
* SAFELY adds given group into this container, checking duplicities in group names.
*
* <p>This used to be the default in JQTI, but wastes processor cycles for the implementation of
* the core QTI spec. I've kept it in in case it might be useful for someone adding a
* (non-standard) extension to the spec.
*
* @param group given group
* @throws QtiNodeGroupException if container already contains group with same name
*/
public void addSafe(final int index, final NodeGroup<?, ?> group) {
for (final NodeGroup<?, ?> child : groups) {
if (child.getName().equals(group.getName())) {
throw new QtiNodeGroupException("Duplicate node group name: " + group.computeXPath());
}
}
groups.add(index, group);
}
/**
* Gets group with given name.
*
* @param name name of requested group
* @return group with given name
* @throws QtiNodeGroupException if group is not found
*/
public NodeGroup<?, ?> get(final String name) {
for (final NodeGroup<?, ?> child : groups) {
if (child.getName().equals(name) || child.supportsQtiClass(name)) {
return child;
}
}
throw new QtiNodeGroupException("Cannot find node group with name " + name);
}