private void traverseEdges(Region r, RegionDigraphVisitor visitor, Set<Region> path) {
for (FilteredRegion fr : r.getEdges()) {
if (visitor.preEdgeTraverse(fr.getFilter())) {
try {
visitRemainingSubgraph(fr.getRegion(), visitor, extendPath(r, path));
} finally {
visitor.postEdgeTraverse(fr.getFilter());
}
}
}
}
private void visitRemainingSubgraph(Region r, RegionDigraphVisitor visitor, Set<Region> path) {
if (!path.contains(r)) {
if (visitor.visit(r)) {
traverseEdges(r, visitor, path);
}
}
}