public void lock() {
if (locked) return;
locked = true;
nodesWithSeveralChildren = new ArrayList<PNode<V, E>>();
nodesWithSeveralChildrenScaled = new ArrayList<PNode<V, E>>();
nodesWithSeveralParents = new ArrayList<PNode<V, E>>();
nodesWithoutChildren = new ArrayList<PNode<V, E>>();
sourceFakeEdges = new ArrayList<PEdge<V, E>>();
for (PNode<V, E> pnode : nodes) {
if (pnode.isSource()) {
PEdge<V, E> fakeEdge = new PEdge<V, E>(root, pnode);
pnode.addParent(fakeEdge);
root.addChild(fakeEdge);
sourceFakeEdges.add(fakeEdge);
}
if (pnode.getChildren().size() >= 2) {
nodesWithSeveralChildren.add(pnode);
int i = pnode.getChildren().size();
while (--i > 0) {
nodesWithSeveralChildrenScaled.add(pnode);
}
}
if (pnode.getParents().size() >= 2) {
nodesWithSeveralParents.add(pnode);
}
if (pnode.getChildren().size() == 0) {
nodesWithoutChildren.add(pnode);
}
}
}
