private void visitNode( Set<Object> gray, Object obj, LinkedList<Object> changedUnits, HashSet<Object> changedUnitsSet) { gray.add(obj); changedUnits.addLast(obj); changedUnitsSet.add(obj); nodes.add(obj); valueBefore.add(newInitialFlow()); valueAfter.add(newInitialFlow()); Iterator succsIt = graph.getSuccsOf(obj).iterator(); if (g.getSuccsOf(obj).size() > 0) { while (succsIt.hasNext()) { Object succ = succsIt.next(); if (!gray.contains(succ)) { visitNode(gray, succ, changedUnits, changedUnitsSet); } } } }