Package org.springframework.data.domain

Interface ScoringFunction

All Known Implementing Classes:

VectorScoringFunctions

public interface ScoringFunction

Strategy interface for scoring functions.

Implementations define how score (distance or similarity) between two vectors is computed, allowing control over ranking behavior in search queries.

Provides commonly used scoring variants via static factory methods. See VectorScoringFunctions for the concrete implementations.

Since:

4.0

Author:

Mark Paluch

See Also:

• Score
• Similarity

Method Summary

Modifier and Type	Method	Description
static ScoringFunction	cosine()	Return the cosine similarity scoring function.
static ScoringFunction	dotProduct()	Return the dot product (also known as inner product) scoring function.
static ScoringFunction	euclidean()	Return the Euclidean distance scoring function.
String	getName()	Return the name of the scoring function.
static ScoringFunction	unspecified()	Returns the default ScoringFunction to be used when none is explicitly specified.

Method Details

unspecified

static ScoringFunction unspecified()

Returns the default ScoringFunction to be used when none is explicitly specified.

This is typically used to indicate the absence of a scoring definition.

Returns:

the default ScoringFunction instance.

euclidean

static ScoringFunction euclidean()

Return the Euclidean distance scoring function.

Calculates the L2 norm (straight-line distance) between two vectors.

Returns:

the ScoringFunction based on Euclidean distance.

cosine

static ScoringFunction cosine()

Return the cosine similarity scoring function.

Measures the cosine of the angle between two vectors, independent of magnitude.

Returns:

the ScoringFunction based on cosine similarity.

dotProduct

static ScoringFunction dotProduct()

Return the dot product (also known as inner product) scoring function.

Computes the algebraic product of two vectors, considering both direction and magnitude.

Returns:

the ScoringFunction based on dot product.

getName

String getName()

Return the name of the scoring function.

Typically used for display or configuration purposes.

Returns:

the identifying name of this scoring function.