Package org.apache.solr.ltr.feature

Class FieldValueFeature.FieldValueFeatureWeight.DefaultValueFieldValueFeatureScorer

java.lang.Object

org.apache.lucene.search.Scorable

org.apache.lucene.search.Scorer

org.apache.solr.ltr.feature.Feature.FeatureWeight.FeatureScorer

org.apache.solr.ltr.feature.FieldValueFeature.FieldValueFeatureWeight.DefaultValueFieldValueFeatureScorer

Enclosing class:

FieldValueFeature.FieldValueFeatureWeight

public final class FieldValueFeature.FieldValueFeatureWeight.DefaultValueFieldValueFeatureScorer
extends Feature.FeatureWeight.FeatureScorer

A FeatureScorer that always returns the default value.

It is used as a fallback for cases when a segment does not have any documents that contain doc values for a field. By doing so, we prevent a fallback to the FieldValueFeatureScorer, which would also return the default value but in a less performant way because it would first try to read the stored fields for the doc (which aren't present).

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.search.Scorable

org.apache.lucene.search.Scorable.ChildScorable

Field Summary

Fields inherited from class org.apache.solr.ltr.feature.Feature.FeatureWeight.FeatureScorer

itr, name

Fields inherited from class org.apache.lucene.search.Scorer

weight

Constructor Summary

Constructors

Constructor	Description
DefaultValueFieldValueFeatureScorer(Feature.FeatureWeight weight, org.apache.lucene.search.DocIdSetIterator itr)

Method Summary

Modifier and Type	Method	Description
float	getMaxScore(int upTo)
float	score()

Methods inherited from class org.apache.solr.ltr.feature.Feature.FeatureWeight.FeatureScorer

docID, getDocInfo, iterator, setDocInfo

Methods inherited from class org.apache.lucene.search.Scorer

advanceShallow, getWeight, twoPhaseIterator

Methods inherited from class org.apache.lucene.search.Scorable

getChildren, setMinCompetitiveScore, smoothingScore

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultValueFieldValueFeatureScorer

public DefaultValueFieldValueFeatureScorer(Feature.FeatureWeight weight,
                                           org.apache.lucene.search.DocIdSetIterator itr)

Method Detail

score

public float score()
            throws IOException

Specified by:

score in class Feature.FeatureWeight.FeatureScorer

Throws:

IOException

getMaxScore

public float getMaxScore(int upTo)
                  throws IOException

Specified by:

getMaxScore in class org.apache.lucene.search.Scorer

Throws:

IOException