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https://issues.apache.org/jira/browse/LUCENE-9330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17114026#comment-17114026
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ASF subversion and git services commented on LUCENE-9330:
---------------------------------------------------------
Commit ad0cefb8ec279e4fae0b104d487deb36ff2f9d27 in lucene-solr's branch
refs/heads/branch_8x from Alan Woodward
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=ad0cefb ]
LUCENE-9330: Make SortFields responsible for index sorting and serialization
(#1440)
This commit adds a new class IndexSorter which handles how a sort should be
applied
to documents in an index:
* how to serialize/deserialize sort info in the segment header
* how to sort documents within a segment
* how to sort documents from merging segments
SortField has a getIndexSorter() method, which will return null if the sort
cannot be used
to sort an index (eg if it uses scores or other query-dependent values). This
also requires a
new Codec as there is a change to the SegmentInfoFormat
> Make SortField responsible for index sorting
> --------------------------------------------
>
> Key: LUCENE-9330
> URL: https://issues.apache.org/jira/browse/LUCENE-9330
> Project: Lucene - Core
> Issue Type: Sub-task
> Reporter: Alan Woodward
> Priority: Major
> Time Spent: 3.5h
> Remaining Estimate: 0h
>
> Index sorting is currently handled inside Sorter and MultiSorter, with
> hard-coded implementations dependent on SortField types. This means that you
> can't sort by custom SortFields, and also that the logic for handling
> specific sort types is split between several unrelated classes.
> SortFields should instead be able to implement their own index sorting
> methods.
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