# Uses of Package
org.apache.lucene.queries.function

Packages that use org.apache.lucene.queries.function
org.apache.lucene.queries.function: Queries that compute score based upon a function.
org.apache.lucene.queries.function.docvalues: FunctionValues for different data types.
org.apache.lucene.queries.function.valuesource: A variety of functions to use with FunctionQuery.

Classes in org.apache.lucene.queries.function used by org.apache.lucene.queries.function
Class and Description
FunctionQuery.FunctionWeight
FunctionScoreQuery A query that wraps another query, and uses a DoubleValuesSource to replace or modify the wrapped query's score If the DoubleValuesSource doesn't return a value for a particular document, then that document will be given a score of 0.
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, and which filters out documents that don't match `ValueSourceScorer.matches(int)`.

Classes in org.apache.lucene.queries.function used by org.apache.lucene.queries.function.docvalues
Class and Description
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, and which filters out documents that don't match `ValueSourceScorer.matches(int)`.

Classes in org.apache.lucene.queries.function used by org.apache.lucene.queries.function.valuesource
Class and Description
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.