Match spotter for all query types
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Key: LUCENE-1999
URL: https://issues.apache.org/jira/browse/LUCENE-1999
Project: Lucene - Java
Issue Type: New Feature
Affects Versions: 2.9
Reporter: Mark Harwood
Attachments: matchflagger.patch
Related to LUCENE-1929 and the current inability to highlight
NumericRangeQuery, spatial, cached term filters and other exotica.
This patch provides the ability to wrap *any* Query objects and record match
info as flags encoded in the overall document score.
Using this approach it would be possible to understand (and therefore
highlight) which fields matched clauses in a query.
The match encoding approach loses some precision in scores as noted here:
http://tinyurl.com/ykt8nx7
Avoiding these precision issues would require a change to Lucene core to record
docId, score AND a matchFlag byte in ScoreDoc objects and collector APIs.
This may be something we should consider.
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