public virtual Explanation Explain(Monodoc.Lucene.Net.Index.IndexReader reader, int doc)
{
Explanation sumExpl = new Explanation();
sumExpl.SetDescription("sum of:");
int coord = 0;
int maxCoord = 0;
float sum = 0.0f;
for (int i = 0; i < weights.Count; i++)
{
BooleanClause c = (BooleanClause)Enclosing_Instance.clauses[i];
Weight w = (Weight)weights[i];
Explanation e = w.Explain(reader, doc);
if (!c.prohibited)
{
maxCoord++;
}
if (e.GetValue() > 0)
{
if (!c.prohibited)
{
sumExpl.AddDetail(e);
sum += e.GetValue();
coord++;
}
else
{
return(new Explanation(0.0f, "match prohibited"));
}
}
else if (c.required)
{
return(new Explanation(0.0f, "match required"));
}
}
sumExpl.SetValue(sum);
if (coord == 1)
{
// only one clause matched
sumExpl = sumExpl.GetDetails()[0]; // eliminate wrapper
}
float coordFactor = Enclosing_Instance.GetSimilarity(searcher).Coord(coord, maxCoord);
if (coordFactor == 1.0f)
{
// coord is no-op
return(sumExpl);
}
// eliminate wrapper
else
{
Explanation result = new Explanation();
result.SetDescription("product of:");
result.AddDetail(sumExpl);
result.AddDetail(new Explanation(coordFactor, "coord(" + coord + "/" + maxCoord + ")"));
result.SetValue(sum * coordFactor);
return(result);
}
}
/// <summary>Adds a clause to a boolean query.</summary>
/// <seealso cref="#GetMaxClauseCount()">
/// </seealso>
public virtual void Add(BooleanClause clause)
{
if (clauses.Count >= maxClauseCount)
throw new TooManyClauses();
clauses.Add(clause);
}
public virtual Scorer Scorer(Monodoc.Lucene.Net.Index.IndexReader reader)
{
// First see if the (faster) ConjunctionScorer will work. This can be
// used when all clauses are required. Also, at this point a
// BooleanScorer cannot be embedded in a ConjunctionScorer, as the hits
// from a BooleanScorer are not always sorted by document number (sigh)
// and hence BooleanScorer cannot implement skipTo() correctly, which is
// required by ConjunctionScorer.
bool allRequired = true;
bool noneBoolean = true;
for (int i = 0; i < weights.Count; i++)
{
BooleanClause c = (BooleanClause)Enclosing_Instance.clauses[i];
if (!c.required)
{
allRequired = false;
}
if (c.query is BooleanQuery)
{
noneBoolean = false;
}
}
if (allRequired && noneBoolean)
{
// ConjunctionScorer is okay
ConjunctionScorer result = new ConjunctionScorer(Enclosing_Instance.GetSimilarity(searcher));
for (int i = 0; i < weights.Count; i++)
{
Weight w = (Weight)weights[i];
Scorer subScorer = w.Scorer(reader);
if (subScorer == null)
{
return(null);
}
result.Add(subScorer);
}
return(result);
}
// Use good-old BooleanScorer instead.
BooleanScorer result2 = new BooleanScorer(Enclosing_Instance.GetSimilarity(searcher));
for (int i = 0; i < weights.Count; i++)
{
BooleanClause c = (BooleanClause)Enclosing_Instance.clauses[i];
Weight w = (Weight)weights[i];
Scorer subScorer = w.Scorer(reader);
if (subScorer != null)
{
result2.Add(subScorer, c.required, c.prohibited);
}
else if (c.required)
{
return(null);
}
}
return(result2);
}
