@Override
public List<? extends NetworkOffering> listNetworkOfferings(final TrafficType trafficType, final boolean systemOnly) {
final Filter searchFilter = new Filter(NetworkOfferingVO.class, "created", false, null, null);
final SearchCriteria<NetworkOfferingVO> sc = _networkOfferingDao.createSearchCriteria();
if (trafficType != null) {
sc.addAnd("trafficType", SearchCriteria.Op.EQ, trafficType);
}
sc.addAnd("systemOnly", SearchCriteria.Op.EQ, systemOnly);
return _networkOfferingDao.search(sc, searchFilter);
}