org.apache.lucene.spatial.vector

Class DistanceValueSource

java.lang.Object

org.apache.lucene.search.DoubleValuesSource

org.apache.lucene.spatial.vector.DistanceValueSource

All Implemented Interfaces:

SegmentCacheable

public class DistanceValueSource
extends DoubleValuesSource

A DoubleValuesSource that returns the distance for a PointVectorStrategy.

Field Summary

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

SCORES

Constructor Summary

Constructors

Constructor and Description
DistanceValueSource(PointVectorStrategy strategy, org.locationtech.spatial4j.shape.Point from, double multiplier) Constructor.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
DoubleValues	getValues(LeafReaderContext readerContext, DoubleValues scores) Returns the FunctionValues used by the function query.
int	hashCode()
boolean	isCacheable(LeafReaderContext ctx)
boolean	needsScores() Return true if document scores are needed to calculate values
DoubleValuesSource	rewrite(IndexSearcher searcher) Return a DoubleValuesSource specialised for the given IndexSearcher Implementations should assume that this will only be called once.
java.lang.String	toString() Returns the ValueSource description.

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

constant, explain, fromDoubleField, fromField, fromFloatField, fromIntField, fromLongField, fromQuery, fromScorer, getSortField, toLongValuesSource

Methods inherited from class java.lang.Object

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

Constructor Detail

DistanceValueSource

public DistanceValueSource(PointVectorStrategy strategy,
                           org.locationtech.spatial4j.shape.Point from,
                           double multiplier)

Constructor.

Method Detail

toString

public java.lang.String toString()

Returns the ValueSource description.

Specified by:

toString in class DoubleValuesSource

getValues

public DoubleValues getValues(LeafReaderContext readerContext,
                              DoubleValues scores)
                       throws java.io.IOException

Returns the FunctionValues used by the function query.

Specified by:

getValues in class DoubleValuesSource

Throws:

java.io.IOException

needsScores

public boolean needsScores()

Description copied from class: DoubleValuesSource

Return true if document scores are needed to calculate values

Specified by:

needsScores in class DoubleValuesSource

isCacheable

public boolean isCacheable(LeafReaderContext ctx)

Returns:

true if the object can be cached against a given leaf

rewrite

public DoubleValuesSource rewrite(IndexSearcher searcher)
                           throws java.io.IOException

Description copied from class: DoubleValuesSource

Return a DoubleValuesSource specialised for the given IndexSearcher Implementations should assume that this will only be called once. IndexReader-independent implementations can just return this Queries that use DoubleValuesSource objects should call rewrite() during Query.createWeight(IndexSearcher, boolean, float) rather than during Query.rewrite(IndexReader) to avoid IndexReader reference leakage

Specified by:

rewrite in class DoubleValuesSource

Throws:

java.io.IOException

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in class DoubleValuesSource

hashCode

public int hashCode()

Specified by:

hashCode in class DoubleValuesSource