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From "Alan Woodward (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-8286) UnifiedHighlighter should support the new Weight.matches API for better match accuracy
Date Wed, 02 May 2018 16:02:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-8286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16461226#comment-16461226
] 

Alan Woodward commented on LUCENE-8286:
---------------------------------------

There's an API mismatch in how offsets are retrieved, per-field in the UnifiedHighlighter
and per-leafreader in the Matches API, which means that (for example) we can't easily use
term vectors for a single field with Matches.  So that will need to be resolved somehow.

> UnifiedHighlighter should support the new Weight.matches API for better match accuracy
> --------------------------------------------------------------------------------------
>
>                 Key: LUCENE-8286
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8286
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/highlighter
>            Reporter: David Smiley
>            Priority: Major
>
> The new Weight.matches() API should allow the UnifiedHighlighter to more accurately highlight
some BooleanQuery patterns correctly -- see LUCENE-7903.
> In addition, this API should make the job of highlighting easier, reducing the LOC and
related complexities, especially the UH's PhraseHelper.  Note: reducing/removing PhraseHelper
is not a near-term goal since Weight.matches is experimental and incomplete, and perhaps we'll
discover some gaps in flexibility/functionality.
> This issue should introduce a new UnifiedHighlighter.HighlightFlag enum option for this
method of highlighting.   Perhaps call it {{WEIGHT_MATCHES}}?  Longer term it could go away
and it'll be implied if you specify enum values for PHRASES & MULTI_TERM_QUERY?



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