[PR] UnifiedHighlighter highlight on multiple fields (#13268) [lucene]

["mayya-sharipova (via GitHub)" <gi...@apache.org>]

mayya-sharipova opened a new pull request, #13297:
URL: https://github.com/apache/lucene/pull/13297

   Add ability to UnifiedHighlighter to combine matches from multiple fields to highlight a single field.
   
   FastVectorHighlighter for a long time has an option to highlight a single field based on matches from several fields. But UnifiedHighlighter was missing this option.
   
   This adds this ability with a new function: `UnifiedHighlighter::withMaskedFieldsFunc`  that sets up a function that given a field retuns a set of masked fields whose matches  are combined  to highlight the given field.
   
   Backport for PR #3268
   


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Re: [PR] UnifiedHighlighter highlight on multiple fields (#13268) [lucene]

["mayya-sharipova (via GitHub)" <gi...@apache.org>]

mayya-sharipova merged PR #13297:
URL: https://github.com/apache/lucene/pull/13297


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