if (o1 instanceof RepositoryRoot && o2 instanceof RepositoryRoot) {
			RepositoryRoot rr1 = (RepositoryRoot) o1;
			RepositoryRoot rr2 = (RepositoryRoot) o2;

			// use repository location strings to compare RepositoryRoots
			ICVSRepositoryLocation rl1 = rr1.getRoot();
			ICVSRepositoryLocation rl2 = rr2.getRoot();

			switch (Math.abs(order)) {
			case ORDER_HOST:
				if (rl1.getHost().compareTo(rl2.getHost()) != 0)
					return (order / Math.abs(order))
							* rl1.getHost().compareTo(rl2.getHost());
			case ORDER_LOCATION:
				if (rl1.getLocation(false).compareTo(rl2.getLocation(false)) != 0)
					return (order / Math.abs(order))
					* (rl1.getLocation(false).compareTo(rl2
							.getLocation(false)));
			// default and any other
			default:	
                           // to jest wywolanie super tylko dla reposow, z przodu ma ten myk z odwracaniem kolejnosci
                           return (order / Math.abs(order)) * super.compare(viewer, o1, o2);
			}
}
// tutaj zostaje po staremu -- ten super jest domyslny dla wszystkich typow elementow
return super.compare(viewer, o1, o2);