public NodeSet except(NodeSet other) {
AVLTreeNodeSet r = new AVLTreeNodeSet();
NodeProxy l;
for (Iterator i = iterator(); i.hasNext(); ) {
l = (NodeProxy) i.next();
if (!other.contains(l)) {
r.add(l);
}
}
return r;
}
/**
* Return a new node set which represents the union of the current node set and the given node
* set.
*
* @param other
*/
public NodeSet union(NodeSet other) {
NewArrayNodeSet result = new NewArrayNodeSet();
result.addAll(other);
NodeProxy p, c;
for (Iterator i = iterator(); i.hasNext(); ) {
p = (NodeProxy) i.next();
if (other.contains(p)) {
c = other.get(p);
if (c != null) c.addMatches(p);
} else result.add(p);
}
return result;
}