public static long getTotalTermFreq(IndexReader reader, Term term) throws Exception {
long totalTF = 0L;
for (final AtomicReaderContext ctx : reader.leaves()) {
AtomicReader r = ctx.reader();
if (!r.hasDeletions()) {
// TODO: we could do this up front, during the scan
// (next()), instead of after-the-fact here w/ seek,
// if the codec supports it and there are no del
// docs...
final long totTF = r.totalTermFreq(term);
if (totTF != -1) {
totalTF += totTF;
continue;
} // otherwise we fall-through
}
// note: what should we do if field omits freqs? currently it counts as 1...
DocsEnum de = r.termDocsEnum(term);
if (de != null) {
while (de.nextDoc() != DocIdSetIterator.NO_MORE_DOCS) totalTF += de.freq();
}
}
return totalTF;
}
