David Smiley created LUCENE-9556:
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Summary: UnifiedHighlighter: distinguish no field from no passages
in field
Key: LUCENE-9556
URL: https://issues.apache.org/jira/browse/LUCENE-9556
Project: Lucene - Core
Issue Type: Improvement
Components: modules/highlighter
Reporter: David Smiley
The UnifiedHighlighter does not distinguish between highlighting a field that
is absent on a document, and highlighting a field that is present but no
passages were found (can happen for a variety of reasons) -- both cases produce
null. While not a huge deal in general, it's an annoyance. It can be useful
for the user/client to detect the content was present but not highlightable so
that it might take some default action, like returning the whole field value
(possibly to process in some way) or highlighting some other field.
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