public GSS create(Item item, GSS cu, Node cn, int ci) {
Node w = cn;
GSS v = makeGSS(item, ci);
if (v.addEdge(w, cu)) {
if (toPop.containsKey(v)) {
for (Node z : toPop.get(v)) {
Node x = getNodeP(item, w, z);
add(item, cu, z.getRightExtent(), x);
}
}
}
return v;
}
public void pop(GSS cu, Node cn, int ci) {
if (!cu.equals(start)) {
if (!toPop.containsKey(cu)) {
toPop.put(cu, new HashSet<Node>());
}
toPop.get(cu).add(cn);
Item cnt = cu.getItem();
for (Entry<Node, Set<GSS>> e : cu.getEdges().entrySet()) {
Node w = e.getKey();
for (GSS u : e.getValue()) {
Node x = getNodeP(cnt, w, cn);
add(cnt, u, ci, x);
}
}
}
}