public abstract static class Similarity.SimWeight extends Object
SimWeightand define the statistics they require in the subclass. Examples include idf, average field length, etc.
|Constructor and Description|
|Modifier and Type||Method and Description|
The value for normalization of contained query clauses (e.g.
Assigns the query normalization factor and boost from parent queries to this.
public abstract float getValueForNormalization()
NOTE: a Similarity implementation might not use any query normalization at all, it's not required. However, if it wants to participate in query normalization, it can return a value here.
public abstract void normalize(float queryNorm, float topLevelBoost)
NOTE: a Similarity implementation might not use this normalized value at all, it's not required. However, it's usually a good idea to at least incorporate the topLevelBoost (e.g. from an outer BooleanQuery) into its score.
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