private static class TFIDFSimilarity.IDFStats extends Similarity.SimWeight
Modifier and Type | Field and Description |
---|---|
private float |
boost |
private java.lang.String |
field |
private Explanation |
idf
The idf and its explanation
|
private float |
queryNorm |
private float |
queryWeight |
private float |
value |
Constructor and Description |
---|
IDFStats(java.lang.String field,
Explanation idf) |
Modifier and Type | Method and Description |
---|---|
float |
getValueForNormalization()
The value for normalization of contained query clauses (e.g.
|
void |
normalize(float queryNorm,
float boost)
Assigns the query normalization factor and boost from parent queries to this.
|
private final java.lang.String field
private final Explanation idf
private float queryNorm
private float boost
private float queryWeight
private float value
public IDFStats(java.lang.String field, Explanation idf)
public float getValueForNormalization()
Similarity.SimWeight
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.
getValueForNormalization
in class Similarity.SimWeight
public void normalize(float queryNorm, float boost)
Similarity.SimWeight
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 boost into its score.
NOTE: If this method is called several times, it behaves as if only the last call was performed.
normalize
in class Similarity.SimWeight