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https://issues.apache.org/jira/browse/LUCENE-10539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17530209#comment-17530209
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ASF subversion and git services commented on LUCENE-10539:
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Commit d0ce05888d62eadf4e1172339338a389b37dad41 in lucene's branch
refs/heads/branch_9x from Dawid Weiss
[ https://gitbox.apache.org/repos/asf?p=lucene.git;h=d0ce05888d6 ]
LUCENE-10539: Return a stream of completions from FSTCompletion. (#844)
> Return a stream of completions from FSTCompletion
> -------------------------------------------------
>
> Key: LUCENE-10539
> URL: https://issues.apache.org/jira/browse/LUCENE-10539
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Dawid Weiss
> Assignee: Dawid Weiss
> Priority: Minor
> Fix For: 9.2
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> FSTLookup currently has a "num" parameter which limits the number of
> completions from the underlying automaton. But this has severe disadvantages
> if you need to collect completions that need to fulfill a secondary condition
> (for example, collect only verbs or terms that contain a certain infix). Then
> you can't determine the 'num' parameter easily because the number of filtered
> completions is unknown.
> I also think implementation-wise it's also much nicer to provide a stream
> that iterates over completions rather than a fixed-size list. This allows for
> much more elegant code (stream.filter, stream.limit).
> The provided patch adds a single {{Stream<Completion> lookup(key)}} method
> and modifies the existing lookup methods to use it.
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