If data source is sorted by some field before indexing
and use docID instead of search score for sorting:
we'll get search result sorted by some field
modify IndexSearcher's HitCollector:
...about line 112
scorer.score(new HitCollector() {
private float minScore = 0.0f;
public final void collect(int doc, float score) {
if (score > 0.0f && // ignore zeroed buckets
(bits==null || bits.get(doc))) { // skip docs
not in bits
totalHits[0]++;
if (score >= minScore) {
/* lucene calculate score for sorting docs
* hq.put(new ScoreDoc(doc, score)); //
update hit queue
* so if we use docID or 1/docID instead of
score for sorting
* we'll get search result sort by docID or by
docID desc
* if data was sorted by some field before
indexing
* we'll get search result sort by some
field...
*/
hq.put(new ScoreDoc(doc, (float) doc)); //
<==use doc instead of score for sorting
if (hq.size() > nDocs) { // if hit queue
overfull
hq.pop(); // remove lowest in hit queue
minScore = ((ScoreDoc)hq.top()).score; // reset
minScore
}
}
}
}
}, reader.maxDoc());
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