/// <summary> Expert: Constructs and initializes a Weight for a top-level query.</summary>
public virtual Weight Weight(Searcher searcher)
{
Query query = searcher.Rewrite(this);
Weight weight = query.CreateWeight(searcher);
float sum = weight.SumOfSquaredWeights();
float norm = GetSimilarity(searcher).QueryNorm(sum);
if (float.IsInfinity(norm) || float.IsNaN(norm))
{
norm = 1.0f;
}
weight.Normalize(norm);
return(weight);
}
public override float SumOfSquaredWeights()
{
float sum = 0.0f;
for (int i = 0; i < weights.Count; i++)
{
BooleanClause c = (BooleanClause)Enclosing_Instance.clauses[i];
Weight w = (Weight)weights[i];
// call sumOfSquaredWeights for all clauses in case of side effects
float s = w.SumOfSquaredWeights(); // sum sub weights
if (!c.IsProhibited())
{
// only add to sum for non-prohibited clauses
sum += s;
}
}
sum *= Enclosing_Instance.GetBoost() * Enclosing_Instance.GetBoost(); // boost each sub-weight
return(sum);
}
