public RouteFilterListsDiff( NavigableMap<String, RouteFilterList> before, NavigableMap<String, RouteFilterList> after) { super(before.keySet(), after.keySet()); for (String name : super.common()) { if (before.get(name).equals(after.get(name))) { _identical.add(name); } else { _diff.add(name); genDiffInfo(before, after, name); } } }