@SuppressWarnings("unchecked")
private void formSplitComponent(
V u,
V v,
V current,
List<E> coveredEdges,
List<V> coveredVertices,
SplitComponent<V, E> component,
Graph<V, E> graph) {
if (coveredVertices.contains(current)) return;
coveredVertices.add(current);
component.addVertex(current);
for (E e : graph.allEdges(current)) {
if (coveredEdges.contains(e)) continue;
coveredEdges.add(e);
component.addEdge(e);
V other = e.getDestination() == current ? e.getOrigin() : e.getDestination();
if (other != u && other != v) {
formSplitComponent(u, v, other, coveredEdges, coveredVertices, component, graph);
} else component.addVertex(other);
}
}
/**
* A maximal split pair with respect to some edge is a split pair not dominated by any other split
* pair with respect to that edge There may several such pairs
*
* @param graph
* @param edge
* @return
*/
public List<SplitPair<V, E>> maximalSplitPairs(Graph<V, E> graph, E edge) {
List<SplitPair<V, E>> ret = new ArrayList<SplitPair<V, E>>();
List<SplitPair<V, E>> splitPairs = findAllSplitPairs(graph);
SplitPair<V, E> edgeSplit = new SplitPair<V, E>(edge.getOrigin(), edge.getDestination());
for (SplitPair<V, E> splitPair1 : splitPairs) {
if (splitPair1.equals(edgeSplit)) continue;
boolean maximal = true;
for (SplitPair<V, E> splitPair2 : splitPairs) {
if (splitPair2.equals(edgeSplit)) continue;
if (splitPair1 == splitPair2) continue;
if (splitPairIsDominantedBy(graph, splitPair1, splitPair2, edge)) {
maximal = false;
break;
}
}
if (maximal) ret.add(splitPair1);
}
return ret;
}
@SuppressWarnings("unchecked")
public List<SplitComponent<V, E>> findAllSplitComponents(
Graph<V, E> graph, SplitPair<V, E> splitPair) {
List<E> coveredEdges = new ArrayList<E>();
List<SplitComponent<V, E>> ret = new ArrayList<SplitComponent<V, E>>();
V u = splitPair.getU();
V v = splitPair.getV();
// add edge
List<E> edges = graph.edgeesBetween(u, v);
for (E e : edges) { // TODO sta ako stvarno ima vise izmedju, da li ovako, ili ne moze...?
SplitComponent<V, E> component = new SplitComponent<>(splitPair, graph);
component.addVertex(v);
component.addVertex(u);
component.addEdge(e);
coveredEdges.add(e);
ret.add(component);
}
for (E e : graph.allEdges(u)) {
if (coveredEdges.contains(e)) continue;
SplitComponent<V, E> component = new SplitComponent<>(splitPair, graph);
coveredEdges.add(e);
component.addVertex(u);
component.addEdge(e);
V other = e.getDestination() == u ? e.getOrigin() : e.getDestination();
if (other == v) // just add split pair vertices and the edge{
continue;
else {
formSplitComponent(u, v, other, coveredEdges, new ArrayList<V>(), component, graph);
}
ret.add(component);
}
return ret;
}