| public abstract QueryNorm ( float sumOfSquaredWeights ) : float | ||
| sumOfSquaredWeights | float | the sum of the squares of query term weights /// |
| return | float | |
public abstract float QueryNorm(float sumOfSquaredWeights);
/// <summary>
/// Creates a normalized weight for a top-level <seealso cref="Query"/>.
/// The query is rewritten by this method and <seealso cref="Query#createWeight"/> called,
/// afterwards the <seealso cref="Weight"/> is normalized. The returned {@code Weight}
/// can then directly be used to get a <seealso cref="Scorer"/>.
/// @lucene.internal
/// </summary>
public virtual Weight CreateNormalizedWeight(Query query)
{
query = Rewrite(query);
Weight weight = query.CreateWeight(this);
float v = weight.ValueForNormalization;
float norm = Similarity.QueryNorm(v);
if (float.IsInfinity(norm) || float.IsNaN(norm))
{
norm = 1.0f;
}
weight.Normalize(norm, 1.0f);
return(weight);
}