Michael McCandless created LUCENE-4304:
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Summary: Remove PayloadProcessProvider
Key: LUCENE-4304
URL: https://issues.apache.org/jira/browse/LUCENE-4304
Project: Lucene - Core
Issue Type: Bug
Reporter: Michael McCandless
Now that we have pluggable codecs (well, PostingsFormat), an app should use a
custom PostingsFormat if it really must change payloads while merging.
Alternatively, use a FilteredIndexReader to modify anything during addIndexes
(eg the facets use case, modifying payloads).
Since this capability can be handled by existing more-generic functions I don't
see why we need to keep PPP around in core. PPP is also fragile because an app
generally has no visibility on when a merge commits so it can't know if the
payloads it retrieves are pre or post PPP.
I think merging shouldn't change postings as a side-effect (by default, anyway,
since a custom PF can of course override merge and do whatever it wants).
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