Package org.elasticsearch.common.lucene.search.function

Class RandomScoreFunction

java.lang.Object

org.elasticsearch.common.lucene.search.function.ScoreFunction

org.elasticsearch.common.lucene.search.function.RandomScoreFunction

public class RandomScoreFunction
extends ScoreFunction

Pseudo randomly generate a score for each LeafScoreFunction.score(int, float).

Constructor Summary

Constructors

Constructor	Description
RandomScoreFunction(int seed, int salt, IndexFieldData<?> uidFieldData)	Creates a RandomScoreFunction.

Method Summary

Modifier and Type	Method	Description
protected boolean	doEquals(ScoreFunction other)	Indicates whether some other ScoreFunction object of the same type is "equal to" this one.
protected int	doHashCode()
LeafScoreFunction	getLeafScoreFunction(org.apache.lucene.index.LeafReaderContext ctx)
boolean	needsScores()	Indicates if document scores are needed by this function.

Methods inherited from class org.elasticsearch.common.lucene.search.function.ScoreFunction

equals, getDefaultScoreCombiner, getWeight, hashCode, rewrite

Methods inherited from class java.lang.Object

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

Constructor Details

RandomScoreFunction

public RandomScoreFunction(int seed,
int salt,
IndexFieldData<?> uidFieldData)

Creates a RandomScoreFunction.

Parameters:

seed - A seed for randomness

salt - A value to salt the seed with, ideally unique to the running node/index

uidFieldData - The field data for _uid to use for generating consistent random values for the same id

Method Details

getLeafScoreFunction

public LeafScoreFunction getLeafScoreFunction(org.apache.lucene.index.LeafReaderContext ctx)

Specified by:

getLeafScoreFunction in class ScoreFunction

needsScores

public boolean needsScores()

Description copied from class: ScoreFunction

Indicates if document scores are needed by this function.

Specified by:

needsScores in class ScoreFunction

Returns:

true if scores are needed.

doEquals

protected boolean doEquals(ScoreFunction other)

Description copied from class: ScoreFunction

Indicates whether some other ScoreFunction object of the same type is "equal to" this one.

Specified by:

doEquals in class ScoreFunction

doHashCode

protected int doHashCode()

Specified by:

doHashCode in class ScoreFunction