@Override public ResultSet match(String queryNumber, MatchingQueryTerms queryTerms) throws IOException { final FatResultSet fat = (FatResultSet) parent.match(queryNumber, queryTerms); if (fat == null) { logger.warn("I got NO ResultSet from parent " + parent.getInfo()); return new FeaturedQueryResultSet(0); } return doMatch(queryNumber, queryTerms, fat); }