public override Explanation Explain(int doc)
{
ComplexExplanation result = new ComplexExplanation();
Explanation nonPayloadExpl = base.Explain(doc);
result.AddDetail(nonPayloadExpl);
//QUESTION: Is there a wau to avoid this skipTo call? We need to know whether to load the payload or not
Explanation payloadBoost = new Explanation();
result.AddDetail(payloadBoost);
/*
* if (skipTo(doc) == true) {
* processPayload();
* }*/
float avgPayloadScore = (payloadsSeen > 0 ? (payloadScore / payloadsSeen) : 1);
payloadBoost.SetValue(avgPayloadScore);
//GSI: I suppose we could toString the payload, but I don't think that would be a good idea
payloadBoost.SetDescription("scorePayload(...)");
result.SetValue(nonPayloadExpl.GetValue() * avgPayloadScore);
result.SetDescription("btq, product of:");
result.SetMatch(nonPayloadExpl.GetValue() == 0 ? false : true); // LUCENE-1303
return(result);
}
public override Explanation Explain(int doc)
{
Explanation tfExplanation = new Explanation();
int expDoc = Advance(doc);
float phraseFreq = (expDoc == doc)?freq:0.0f;
tfExplanation.SetValue(GetSimilarity().Tf(phraseFreq));
tfExplanation.SetDescription("tf(phraseFreq=" + phraseFreq + ")");
return(tfExplanation);
}
public override Explanation Explain(int doc)
{
Explanation result = new Explanation();
Explanation nonPayloadExpl = base.Explain(doc);
result.AddDetail(nonPayloadExpl);
Explanation payloadBoost = new Explanation();
result.AddDetail(payloadBoost);
float avgPayloadScore = (payloadsSeen > 0?(payloadScore / payloadsSeen):1);
payloadBoost.SetValue(avgPayloadScore);
payloadBoost.SetDescription("scorePayload(...)");
result.SetValue(nonPayloadExpl.GetValue() * avgPayloadScore);
result.SetDescription("bnq, product of:");
return(result);
}
public double Score(Rectangle indexRect, Explanation exp)
{
double score;
if (indexRect == null)
{
score = nullValue;
}
else
{
score = distCalc.Distance(queryPoint, indexRect.GetCenter());
}
if (exp != null)
{
exp.SetValue((float)score);
exp.SetDescription(GetType().Name);
exp.AddDetail(new Explanation(-1f, "" + queryPoint));
exp.AddDetail(new Explanation(-1f, "" + indexRect));
}
return(score);
}
public override Explanation Explain(IndexReader reader, int doc)
{
ComplexExplanation result = new ComplexExplanation();
result.SetDescription("weight(" + GetQuery() + " in " + doc + "), product of:");
System.String field = ((SpanQuery)GetQuery()).GetField();
Explanation idfExpl = new Explanation(idf, "idf(" + field + ": " + idfExp.Explain() + ")");
// explain query weight
Explanation queryExpl = new Explanation();
queryExpl.SetDescription("queryWeight(" + GetQuery() + "), product of:");
Explanation boostExpl = new Explanation(GetQuery().GetBoost(), "boost");
if (GetQuery().GetBoost() != 1.0f)
{
queryExpl.AddDetail(boostExpl);
}
queryExpl.AddDetail(idfExpl);
Explanation queryNormExpl = new Explanation(queryNorm, "queryNorm");
queryExpl.AddDetail(queryNormExpl);
queryExpl.SetValue(boostExpl.GetValue() * idfExpl.GetValue() * queryNormExpl.GetValue());
result.AddDetail(queryExpl);
// explain field weight
ComplexExplanation fieldExpl = new ComplexExplanation();
fieldExpl.SetDescription("fieldWeight(" + field + ":" + query.ToString(field) + " in " + doc + "), product of:");
Explanation tfExpl = Scorer(reader, true, false).Explain(doc);
fieldExpl.AddDetail(tfExpl);
fieldExpl.AddDetail(idfExpl);
Explanation fieldNormExpl = new Explanation();
byte[] fieldNorms = reader.Norms(field);
float fieldNorm = fieldNorms != null?Similarity.DecodeNorm(fieldNorms[doc]) : 1.0f;
fieldNormExpl.SetValue(fieldNorm);
fieldNormExpl.SetDescription("fieldNorm(field=" + field + ", doc=" + doc + ")");
fieldExpl.AddDetail(fieldNormExpl);
fieldExpl.SetMatch(tfExpl.IsMatch());
fieldExpl.SetValue(tfExpl.GetValue() * idfExpl.GetValue() * fieldNormExpl.GetValue());
result.AddDetail(fieldExpl);
System.Boolean?tempAux = fieldExpl.GetMatch();
result.SetMatch(tempAux);
// combine them
result.SetValue(queryExpl.GetValue() * fieldExpl.GetValue());
if (queryExpl.GetValue() == 1.0f)
{
return(fieldExpl);
}
return(result);
}
public virtual Explanation Explain(IndexReader reader, int doc)
{
ComplexExplanation result = new ComplexExplanation();
result.SetDescription("weight(" + GetQuery() + " in " + doc + "), product of:");
System.String field = ((SpanQuery)GetQuery()).GetField();
System.Text.StringBuilder docFreqs = new System.Text.StringBuilder();
System.Collections.IEnumerator i = terms.GetEnumerator();
while (i.MoveNext())
{
System.Collections.DictionaryEntry tmp = (System.Collections.DictionaryEntry)i.Current;
Term term = (Term)tmp.Key;
docFreqs.Append(term.Text());
docFreqs.Append("=");
docFreqs.Append(reader.DocFreq(term));
if (i.MoveNext())
{
docFreqs.Append(" ");
}
}
Explanation idfExpl = new Explanation(idf, "idf(" + field + ": " + docFreqs + ")");
// explain query weight
Explanation queryExpl = new Explanation();
queryExpl.SetDescription("queryWeight(" + GetQuery() + "), product of:");
Explanation boostExpl = new Explanation(GetQuery().GetBoost(), "boost");
if (GetQuery().GetBoost() != 1.0f)
{
queryExpl.AddDetail(boostExpl);
}
queryExpl.AddDetail(idfExpl);
Explanation queryNormExpl = new Explanation(queryNorm, "queryNorm");
queryExpl.AddDetail(queryNormExpl);
queryExpl.SetValue(boostExpl.GetValue() * idfExpl.GetValue() * queryNormExpl.GetValue());
result.AddDetail(queryExpl);
// explain field weight
ComplexExplanation fieldExpl = new ComplexExplanation();
fieldExpl.SetDescription("fieldWeight(" + field + ":" + query.ToString(field) + " in " + doc + "), product of:");
Explanation tfExpl = Scorer(reader).Explain(doc);
fieldExpl.AddDetail(tfExpl);
fieldExpl.AddDetail(idfExpl);
Explanation fieldNormExpl = new Explanation();
byte[] fieldNorms = reader.Norms(field);
float fieldNorm = fieldNorms != null?Similarity.DecodeNorm(fieldNorms[doc]) : 0.0f;
fieldNormExpl.SetValue(fieldNorm);
fieldNormExpl.SetDescription("fieldNorm(field=" + field + ", doc=" + doc + ")");
fieldExpl.AddDetail(fieldNormExpl);
fieldExpl.SetMatch(tfExpl.IsMatch());
fieldExpl.SetValue(tfExpl.GetValue() * idfExpl.GetValue() * fieldNormExpl.GetValue());
result.AddDetail(fieldExpl);
System.Boolean tempAux = fieldExpl.GetMatch();
result.SetMatch(tempAux);
// combine them
result.SetValue(queryExpl.GetValue() * fieldExpl.GetValue());
if (queryExpl.GetValue() == 1.0f)
{
return(fieldExpl);
}
return(result);
}
public double Score(Rectangle target, Explanation exp)
{
if (target == null || queryArea <= 0)
{
return(0);
}
double targetArea = target.GetArea(null);
if (targetArea <= 0)
{
return(0);
}
double score = 0;
double top = Math.Min(queryExtent.GetMaxY(), target.GetMaxY());
double bottom = Math.Max(queryExtent.GetMinY(), target.GetMinY());
double height = top - bottom;
double width = 0;
// queries that cross the date line
if (queryExtent.GetCrossesDateLine())
{
// documents that cross the date line
if (target.GetCrossesDateLine())
{
double left = Math.Max(queryExtent.GetMinX(), target.GetMinX());
double right = Math.Min(queryExtent.GetMaxX(), target.GetMaxX());
width = right + 360.0 - left;
}
else
{
double qryWestLeft = Math.Max(queryExtent.GetMinX(), target.GetMaxX());
double qryWestRight = Math.Min(target.GetMaxX(), 180.0);
double qryWestWidth = qryWestRight - qryWestLeft;
if (qryWestWidth > 0)
{
width = qryWestWidth;
}
else
{
double qryEastLeft = Math.Max(target.GetMaxX(), -180.0);
double qryEastRight = Math.Min(queryExtent.GetMaxX(), target.GetMaxX());
double qryEastWidth = qryEastRight - qryEastLeft;
if (qryEastWidth > 0)
{
width = qryEastWidth;
}
}
}
}
else
{ // queries that do not cross the date line
if (target.GetCrossesDateLine())
{
double tgtWestLeft = Math.Max(queryExtent.GetMinX(), target.GetMinX());
double tgtWestRight = Math.Min(queryExtent.GetMaxX(), 180.0);
double tgtWestWidth = tgtWestRight - tgtWestLeft;
if (tgtWestWidth > 0)
{
width = tgtWestWidth;
}
else
{
double tgtEastLeft = Math.Max(queryExtent.GetMinX(), -180.0);
double tgtEastRight = Math.Min(queryExtent.GetMaxX(), target.GetMaxX());
double tgtEastWidth = tgtEastRight - tgtEastLeft;
if (tgtEastWidth > 0)
{
width = tgtEastWidth;
}
}
}
else
{
double left = Math.Max(queryExtent.GetMinX(), target.GetMinX());
double right = Math.Min(queryExtent.GetMaxX(), target.GetMaxX());
width = right - left;
}
}
// calculate the score
if ((width > 0) && (height > 0))
{
double intersectionArea = width * height;
double queryRatio = intersectionArea / queryArea;
double targetRatio = intersectionArea / targetArea;
double queryFactor = Math.Pow(queryRatio, queryPower);
double targetFactor = Math.Pow(targetRatio, targetPower);
score = queryFactor * targetFactor * 10000.0;
if (exp != null)
{
// StringBuilder sb = new StringBuilder();
// sb.append("\nscore=").append(score);
// sb.append("\n query=").append();
// sb.append("\n target=").append(target.toString());
// sb.append("\n intersectionArea=").append(intersectionArea);
//
// sb.append(" queryArea=").append(queryArea).append(" targetArea=").append(targetArea);
// sb.append("\n queryRatio=").append(queryRatio).append(" targetRatio=").append(targetRatio);
// sb.append("\n queryFactor=").append(queryFactor).append(" targetFactor=").append(targetFactor);
// sb.append(" (queryPower=").append(queryPower).append(" targetPower=").append(targetPower).append(")");
exp.SetValue((float)score);
exp.SetDescription(GetType().Name);
Explanation e = null;
exp.AddDetail(e = new Explanation((float)intersectionArea, "IntersectionArea"));
e.AddDetail(new Explanation((float)width, "width; Query: " + queryExtent));
e.AddDetail(new Explanation((float)height, "height; Target: " + target));
exp.AddDetail(e = new Explanation((float)queryFactor, "Query"));
e.AddDetail(new Explanation((float)queryArea, "area"));
e.AddDetail(new Explanation((float)queryRatio, "ratio"));
e.AddDetail(new Explanation((float)queryPower, "power"));
exp.AddDetail(e = new Explanation((float)targetFactor, "Target"));
e.AddDetail(new Explanation((float)targetArea, "area"));
e.AddDetail(new Explanation((float)targetRatio, "ratio"));
e.AddDetail(new Explanation((float)targetPower, "power"));
}
}
else if (exp != null)
{
exp.SetValue(0);
exp.SetDescription("Shape does not intersect");
}
return(score);
}