FunctionQuery - score based on field value
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Key: LUCENE-446
URL: http://issues.apache.org/jira/browse/LUCENE-446
Project: Lucene - Java
Type: New Feature
Components: Search
Versions: 1.9
Reporter: Yonik Seeley
FunctionQuery can return a score based on a field's value or on it's ordinal
value.
FunctionFactory subclasses define the details of the function. There is
currently a LinearFloatFunction (a line specified by slope and intercept).
Field values are typically obtained from FieldValueSourceFactory.
Implementations include FloatFieldSource, IntFieldSource, and OrdFieldSource.
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