Namespace Lucene.Net.Queries.Function

Queries that compute score based upon a function

Classes

FunctionQuery

Returns a score for each document based on a ValueSource, often some function of the value of a field.

Note: This API is experimental and may change in non backward-compatible ways in the future

FunctionQuery.AllScorer

Queries that compute score based upon a function

FunctionQuery.FunctionWeight

Queries that compute score based upon a function

FunctionValues

Represents field values as different types. Normally created via a ValueSource for a particular field and reader.

Abstraction of the logic required to fill the value of a specified doc into a reusable Lucene.Net.Util.Mutable.MutableValue. Implementations of FunctionValues are encouraged to define their own implementations of FunctionValues.ValueFiller if their value is not a float.

Note

This API is experimental and might change in incompatible ways in the next release.

ValueSource

Instantiates FunctionValues for a particular reader.

Often used when creating a FunctionQuery.

ValueSourceScorer

Lucene.Net.Search.Scorer which returns the result of SingleVal(int) as the score for a document.

When overriding this class, be aware that ValueSourceScorer constructor is calling its private SetCheckDeletesInternal method as opposed to virtual SetCheckDeletes method. This is done to avoid virtual call in constructor. You can call your own private method for CheckDeletes initialization in your constructor if you need to.