public Set<E> outgoingEdgesOf(V vertex) {
Set<E> res = new HashSet<E>();
if (getG1().containsVertex(vertex)) {
res.addAll(getG1().outgoingEdgesOf(vertex));
}
if (getG2().containsVertex(vertex)) {
res.addAll(getG2().outgoingEdgesOf(vertex));
}
return Collections.unmodifiableSet(res);
}
public Set<E> getAllEdges(V sourceVertex, V targetVertex) {
Set<E> res = new HashSet<E>();
if (g1.containsVertex(sourceVertex) && g1.containsVertex(targetVertex)) {
res.addAll(g1.getAllEdges(sourceVertex, targetVertex));
}
if (g2.containsVertex(sourceVertex) && g2.containsVertex(targetVertex)) {
res.addAll(g2.getAllEdges(sourceVertex, targetVertex));
}
return Collections.unmodifiableSet(res);
}
public Set<E> edgesOf(V vertex) {
Set<E> res = new HashSet<E>();
if (g1.containsVertex(vertex)) {
res.addAll(g1.edgesOf(vertex));
}
if (g2.containsVertex(vertex)) {
res.addAll(g2.edgesOf(vertex));
}
return Collections.unmodifiableSet(res);
}
public Set<V> vertexSet() {
Set<V> res = new HashSet<V>();
res.addAll(g1.vertexSet());
res.addAll(g2.vertexSet());
return Collections.unmodifiableSet(res);
}
public Set<E> edgeSet() {
Set<E> res = new HashSet<E>();
res.addAll(g1.edgeSet());
res.addAll(g2.edgeSet());
return Collections.unmodifiableSet(res);
}