Consolidate CustomScoreQuery, ValueSourceQuery and BoostedQuery
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Key: LUCENE-3256
URL: https://issues.apache.org/jira/browse/LUCENE-3256
Project: Lucene - Java
Issue Type: Sub-task
Reporter: Chris Male
Lucene's CustomScoreQuery and Solr's BoostedQuery do essentially the same
thing: they boost the scores of Documents by the value from a ValueSource.
BoostedQuery does this in a direct fashion, by accepting a ValueSource.
CustomScoreQuery on the other hand, accepts a series of ValueSourceQuerys.
ValueSourceQuery seems to do exactly the same thing as FunctionQuery.
With Lucene's ValueSource being deprecated / removed, we need to resolve these
dependencies and simplify the code.
Therefore I recommend we do the following things:
- Move CustomScoreQuery (and CustomScoreProvider) to the new Queries module and
change it over to use FunctionQuerys instead of ValueSourceQuerys.
- Deprecate Solr's BoostedQuery in favour of the new CustomScoreQuery. CSQ
provides a lot of support for customizing the scoring process.
- Move and consolidate all tests of CSQ and BoostedQuery, to the Queries module
and have them test CSQ instead.
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