[ http://issues.apache.org/jira/browse/LUCENE-395?page=all ]
Hoss Man updated LUCENE-395:
----------------------------
Attachment: TestBooleanMinShouldMatch.java
Paul: i thought i had accounted for both situations, but you're right -- it's
not enough to make sure that all of the existing usages of DisjunctionSumScorer
now use the min cut-off, because when there are required scorers, the existing
uses of DisjunctionSumScorer are allways treated as optional. the internal
logic in makeCountingSumScorer basically needs to be "turned inside out" so
that if the min value is set, a DisjunctionSumScorer is constructed, and
treated as a required scorer.
I started trying to do this but i haven't really made any progress, and now i
have to go get on a plane, so unless someone else takes a stab at it, I'll try
to post an updated patch on monday.
in the mean time, here is a revised version of the test class that accounts for
more possible code paths in the existing logic (particularly, the difference in
behavior when there is one required vs more then one required, and/or one
prohibited vs more then one prohibited.
> CoordConstrainedBooleanQuery + QueryParser support
> --------------------------------------------------
>
> Key: LUCENE-395
> URL: http://issues.apache.org/jira/browse/LUCENE-395
> Project: Lucene - Java
> Type: Improvement
> Components: Search
> Versions: unspecified
> Environment: Operating System: other
> Platform: Other
> Reporter: Mark Harwood
> Assignee: Lucene Developers
> Priority: Minor
> Attachments: CoordConstrainedBooleanQuery.java,
> CoordConstrainedBooleanQuery.java, CustomQueryParserExample.java,
> CustomQueryParserExample.java, LUCENE-395.patch,
> TestBooleanMinShouldMatch.java, TestBooleanMinShouldMatch.java
>
> Attached 2 new classes:
> 1) CoordConstrainedBooleanQuery
> A boolean query that only matches if a specified number of the contained
> clauses
> match. An example use might be a query that returns a list of books where ANY
> 2
> people from a list of people were co-authors, eg:
> "Lucene In Action" would match ("Erik Hatcher" "Otis Gospodnetić" "Mark
> Harwood"
> "Doug Cutting") with a minRequiredOverlap of 2 because Otis and Erik wrote
> that.
> The book "Java Development with Ant" would not match because only 1 element in
> the list (Erik) was selected.
> 2) CustomQueryParserExample
> A customised QueryParser that allows definition of
> CoordConstrainedBooleanQueries. The solution (mis)uses fieldnames to pass
> parameters to the custom query.
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