/// <summary>
/// This method is no longer an official member of <see cref="Scorer"/>
/// but it is needed by SpanWeight to build an explanation.
/// </summary>
protected internal virtual Explanation Explain(int doc)
{
Explanation tfExplanation = new Explanation();
int expDoc = Advance(doc);
float phraseFreq = (expDoc == doc)?freq:0.0f;
tfExplanation.Value = Similarity.Tf(phraseFreq);
tfExplanation.Description = "tf(phraseFreq=" + phraseFreq + ")";
return(tfExplanation);
}
public override float Score()
{
float raw = Similarity.Tf(freq) * value_Renamed; // raw score
return(norms == null?raw:raw *Similarity.DecodeNorm(norms[doc])); // normalize
}