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https://issues.apache.org/jira/browse/LUCENE-1849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12747678#action_12747678
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Michael McCandless commented on LUCENE-1849:
--------------------------------------------
Good catch! It should not be doing that. It should be passing "true" down
since it will use advance.
But it doesn't result in a bug, because 1) its Weight.scoresDocsOutOfOrder
returns false, which causes IndexSearcher's sort by relevance or field methods
to pick an in-order collector which then causes IndexSearcher to pass "true"
for scoreDocsInOrder, and 2) it's passing down "false" for topScorer, which
causes BooleanQuery to not return an out-of-order scorer.
I'll commit a fix plus a test shortly.
> Add OutOfOrderCollector and InOrderCollector subclasses of Collector
> --------------------------------------------------------------------
>
> Key: LUCENE-1849
> URL: https://issues.apache.org/jira/browse/LUCENE-1849
> Project: Lucene - Java
> Issue Type: Wish
> Components: Search
> Affects Versions: 2.9
> Reporter: Tim Smith
> Priority: Minor
> Fix For: 2.9
>
>
> I find myself always having to implement these methods, and i always return a
> constant (depending on if the collector can handle out of order hits)
> would be nice for these two convenience abstract classes to exist that
> implemented acceptsDocsOutOfOrder() as final and returned the appropriate
> value
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