internal TFIDFSimScorer(TFIDFSimilarity outerInstance, IDFStats stats, NumericDocValues norms)
{
this.outerInstance = outerInstance;
this.stats = stats;
this.weightValue = stats.Value;
this.norms = norms;
}
private Explanation ExplainScore(int doc, Explanation freq, IDFStats stats, NumericDocValues norms)
{
Explanation result = new Explanation();
result.Description = "score(doc=" + doc + ",freq=" + freq + "), product of:";
// explain query weight
Explanation queryExpl = new Explanation();
queryExpl.Description = "queryWeight, product of:";
Explanation boostExpl = new Explanation(stats.QueryBoost, "boost");
if (stats.QueryBoost != 1.0f)
{
queryExpl.AddDetail(boostExpl);
}
queryExpl.AddDetail(stats.Idf);
Explanation queryNormExpl = new Explanation(stats.QueryNorm, "queryNorm");
queryExpl.AddDetail(queryNormExpl);
queryExpl.Value = boostExpl.Value * stats.Idf.Value * queryNormExpl.Value;
result.AddDetail(queryExpl);
// explain field weight
Explanation fieldExpl = new Explanation();
fieldExpl.Description = "fieldWeight in " + doc + ", product of:";
Explanation tfExplanation = new Explanation();
tfExplanation.Value = Tf(freq.Value);
tfExplanation.Description = "tf(freq=" + freq.Value + "), with freq of:";
tfExplanation.AddDetail(freq);
fieldExpl.AddDetail(tfExplanation);
fieldExpl.AddDetail(stats.Idf);
Explanation fieldNormExpl = new Explanation();
float fieldNorm = norms != null?DecodeNormValue(norms.Get(doc)) : 1.0f;
fieldNormExpl.Value = fieldNorm;
fieldNormExpl.Description = "fieldNorm(doc=" + doc + ")";
fieldExpl.AddDetail(fieldNormExpl);
fieldExpl.Value = tfExplanation.Value * stats.Idf.Value * fieldNormExpl.Value;
result.AddDetail(fieldExpl);
// combine them
result.Value = queryExpl.Value * fieldExpl.Value;
if (queryExpl.Value == 1.0f)
{
return(fieldExpl);
}
return(result);
}
public override sealed SimScorer GetSimScorer(SimWeight stats, AtomicReaderContext context)
{
IDFStats idfstats = (IDFStats)stats;
return(new TFIDFSimScorer(this, idfstats, context.AtomicReader.GetNormValues(idfstats.Field)));
}
private Explanation ExplainScore(int doc, Explanation freq, IDFStats stats, NumericDocValues norms)
{
Explanation result = new Explanation();
// LUCENENET specific - using freq.Value is a change that was made in Lucene 5.0, but is included
// in 4.8.0 to remove annoying newlines from the output.
// See: https://github.com/apache/lucene-solr/commit/f0bfcbc7d8fbc5bb2791da60af559e8b0ad6eed6
result.Description = "score(doc=" + doc + ",freq=" + freq.Value + "), product of:";
// explain query weight
Explanation queryExpl = new Explanation();
queryExpl.Description = "queryWeight, product of:";
Explanation boostExpl = new Explanation(stats.QueryBoost, "boost");
if (stats.QueryBoost != 1.0f)
{
queryExpl.AddDetail(boostExpl);
}
queryExpl.AddDetail(stats.Idf);
Explanation queryNormExpl = new Explanation(stats.QueryNorm, "queryNorm");
queryExpl.AddDetail(queryNormExpl);
queryExpl.Value = boostExpl.Value * stats.Idf.Value * queryNormExpl.Value;
result.AddDetail(queryExpl);
// explain field weight
Explanation fieldExpl = new Explanation();
fieldExpl.Description = "fieldWeight in " + doc + ", product of:";
Explanation tfExplanation = new Explanation();
tfExplanation.Value = Tf(freq.Value);
tfExplanation.Description = "tf(freq=" + freq.Value + "), with freq of:";
tfExplanation.AddDetail(freq);
fieldExpl.AddDetail(tfExplanation);
fieldExpl.AddDetail(stats.Idf);
Explanation fieldNormExpl = new Explanation();
float fieldNorm = norms != null?DecodeNormValue(norms.Get(doc)) : 1.0f;
fieldNormExpl.Value = fieldNorm;
fieldNormExpl.Description = "fieldNorm(doc=" + doc + ")";
fieldExpl.AddDetail(fieldNormExpl);
fieldExpl.Value = tfExplanation.Value * stats.Idf.Value * fieldNormExpl.Value;
result.AddDetail(fieldExpl);
// combine them
result.Value = queryExpl.Value * fieldExpl.Value;
if (queryExpl.Value == 1.0f)
{
return(fieldExpl);
}
return(result);
}
internal TFIDFSimScorer(TFIDFSimilarity outerInstance, IDFStats stats, NumericDocValues norms)
{
this.OuterInstance = outerInstance;
this.Stats = stats;
this.WeightValue = stats.Value;
this.Norms = norms;
}
private Explanation ExplainScore(int doc, Explanation freq, IDFStats stats, NumericDocValues norms)
{
Explanation result = new Explanation();
result.Description = "score(doc=" + doc + ",freq=" + freq + "), product of:";
// explain query weight
Explanation queryExpl = new Explanation();
queryExpl.Description = "queryWeight, product of:";
Explanation boostExpl = new Explanation(stats.QueryBoost, "boost");
if (stats.QueryBoost != 1.0f)
{
queryExpl.AddDetail(boostExpl);
}
queryExpl.AddDetail(stats.Idf);
Explanation queryNormExpl = new Explanation(stats.QueryNorm, "queryNorm");
queryExpl.AddDetail(queryNormExpl);
queryExpl.Value = boostExpl.Value * stats.Idf.Value * queryNormExpl.Value;
result.AddDetail(queryExpl);
// explain field weight
Explanation fieldExpl = new Explanation();
fieldExpl.Description = "fieldWeight in " + doc + ", product of:";
Explanation tfExplanation = new Explanation();
tfExplanation.Value = Tf(freq.Value);
tfExplanation.Description = "tf(freq=" + freq.Value + "), with freq of:";
tfExplanation.AddDetail(freq);
fieldExpl.AddDetail(tfExplanation);
fieldExpl.AddDetail(stats.Idf);
Explanation fieldNormExpl = new Explanation();
float fieldNorm = norms != null ? DecodeNormValue(norms.Get(doc)) : 1.0f;
fieldNormExpl.Value = fieldNorm;
fieldNormExpl.Description = "fieldNorm(doc=" + doc + ")";
fieldExpl.AddDetail(fieldNormExpl);
fieldExpl.Value = tfExplanation.Value * stats.Idf.Value * fieldNormExpl.Value;
result.AddDetail(fieldExpl);
// combine them
result.Value = queryExpl.Value * fieldExpl.Value;
if (queryExpl.Value == 1.0f)
{
return fieldExpl;
}
return result;
}
