protected AugmentScorer(
BoboIndexReader reader, Scorer innerScorer, ScoreAugmentFunction func, JSONObject jsonParms)
throws IOException {
super(innerScorer.getSimilarity());
_innerScorer = innerScorer;
_func = func;
_func.initializeReader(reader, jsonParms);
}
public ScoreAugmentQuery(Query query, ScoreAugmentFunction func, JSONObject jsonParam)
throws JSONException {
super(query);
_func = func;
_func.initializeGlobal(jsonParam);
_jsonParam = jsonParam;
if (_func == null) throw new IllegalArgumentException("augment function cannot be null");
}
@Override
protected Scorer createScorer(
Scorer innerScorer, IndexReader reader, boolean scoreDocsInOrder, boolean topScorer)
throws IOException {
if (reader instanceof BoboIndexReader) {
return new AugmentScorer((BoboIndexReader) reader, innerScorer, _func.getCopy(), _jsonParam);
} else {
throw new IllegalStateException("reader not instance of " + BoboIndexReader.class);
}
}
@Override
protected Explanation createExplain(Explanation innerExplain, IndexReader reader, int doc)
throws IOException {
if (reader instanceof BoboIndexReader) {
Explanation finalExpl = new Explanation();
finalExpl.addDetail(innerExplain);
_func.initializeReader((BoboIndexReader) reader, _jsonParam);
float innerValue = innerExplain.getValue();
float value = 0;
if (_func.useInnerScore()) value = _func.newScore(innerValue, doc);
else value = _func.newScore(doc);
finalExpl.setValue(value);
finalExpl.setDescription("Custom score: " + _func.getExplainString(innerValue, doc));
return finalExpl;
} else {
throw new IllegalStateException("reader not instance of " + BoboIndexReader.class);
}
}
@Override
public float score() throws IOException {
return (_func.useInnerScore())
? _func.newScore(_innerScorer.score(), _innerScorer.docID())
: _func.newScore(_innerScorer.docID());
}
