public static ExtendedIterator predicatesFor(Graph g, Node s, Node o) {
Set predicates = CollectionFactory.createHashedSet();
ClosableIterator it = g.find(s, Node.ANY, o);
while (it.hasNext()) predicates.add(((Triple) it.next()).getPredicate());
return WrappedIterator.createNoRemove(predicates.iterator());
}
public static ExtendedIterator subjectsFor(Graph g, Node p, Node o) {
Set objects = CollectionFactory.createHashedSet();
ClosableIterator it = g.find(Node.ANY, p, o);
while (it.hasNext()) objects.add(((Triple) it.next()).getSubject());
return WrappedIterator.createNoRemove(objects.iterator());
}