/** Puts all elements in a list and returns them. This is an O(n) operation. */
@Override
public ReifiedList<T> toList() {
return store.getKeys().toList();
}
/**
* Returns an ascending key order iterator over the set. This is an O(nlog2(n)) operation, taking
* element traversal into account.
*/
@Override
public Iterator<T> iterator() {
return store.getKeys().iterator();
}
/** Puts all elements in an array and returns them. This is an O(n) operation. */
@Override
public T[] toArray() {
return store.getKeys().toArray();
}
/**
* Returns true if an item is contained in the collection. This is an O(log2(n)) operation.
*
* @throws NullPointerException When the item is null.
*/
@Override
public boolean contains(T item) {
if (item == null) throw new NullPointerException("item");
return store.getKeys().contains(item);
}