GFFRecordFilter.SequenceFilter sFilter = new GFFRecordFilter.SequenceFilter();
sFilter.setSeqName(seqName);
// have to and the filters together
GFFAndFilter aFilter = new GFFAndFilter(fFilter, sFilter);
GFFFilterer filterer = new GFFFilterer(gffEntries.getAddHandler(), aFilter);
// parse the gff file
GFFParser parser = new GFFParser();
parser.parse(new BufferedReader(new InputStreamReader(new FileInputStream(new File(gffFileName)))), filterer);