# Package org.apache.lucene.queries.function

Queries that compute score based upon a function

See: Description

Class Summary
Class | Description
--- | ---
BoostedQuery | Query that is boosted by a ValueSource
FunctionQuery | Returns a score for each document based on a ValueSource, often some function of the value of a field.
FunctionValues | Represents field values as different types.
FunctionValues.ValueFiller | Abstraction of the logic required to fill the value of a specified doc into a reusable `MutableValue`.
ValueSource | Instantiates `FunctionValues` for a particular reader.
ValueSourceScorer | `Scorer` which returns the result of `FunctionValues.floatVal(int)` as the score for a document.

## Package org.apache.lucene.queries.function Description

Queries that compute score based upon a function