public FacetBasedBoostingScorer(FacetBasedBoostScorerBuilder parent, BoboSegmentReader reader, Scorer innerScorer)
: base(innerScorer.Weight)
{
m_innerScorer = innerScorer;
List <BoboDocScorer> list = new List <BoboDocScorer>();
foreach (var boostEntry in parent.m_boostMaps)
{
string facetName = boostEntry.Key;
IFacetHandler handler = reader.GetFacetHandler(facetName);
if (!(handler is IFacetScoreable))
{
throw new ArgumentException(facetName + " does not implement IFacetScoreable");
}
IFacetScoreable facetScoreable = (IFacetScoreable)handler;
BoboDocScorer scorer = facetScoreable.GetDocScorer(reader, parent.m_scoringFunctionFactory, boostEntry.Value);
if (scorer != null)
{
list.Add(scorer);
}
}
m_facetScorers = list.ToArray();
m_docid = -1;
}
public virtual Explanation Explain(AtomicReader indexReader, int docid, Explanation innerExplaination)
{
if (!(indexReader is BoboSegmentReader))
{
throw new ArgumentException("IndexReader is not BoboSegmentReader");
}
BoboSegmentReader reader = (BoboSegmentReader)indexReader;
Explanation exp = new Explanation();
exp.Description = "FacetBasedBoost";
float boost = 1.0f;
foreach (var boostEntry in m_boostMaps)
{
string facetName = boostEntry.Key;
IFacetHandler handler = reader.GetFacetHandler(facetName);
if (!(handler is IFacetScoreable))
{
throw new ArgumentException(facetName + " does not implement IFacetScoreable");
}
IFacetScoreable facetScoreable = (IFacetScoreable)handler;
BoboDocScorer scorer = facetScoreable.GetDocScorer(reader, m_scoringFunctionFactory, boostEntry.Value);
float facetBoost = scorer.Score(docid);
Explanation facetExp = new Explanation();
facetExp.Description = facetName;
facetExp.Value = facetBoost;
facetExp.AddDetail(scorer.Explain(docid));
boost *= facetBoost;
exp.AddDetail(facetExp);
}
exp.Value = boost;
exp.AddDetail(innerExplaination);
return(exp);
}
