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From "Tim Smith (JIRA)" <>
Subject [jira] Commented: (LUCENE-1849) Add OutOfOrderCollector and InOrderCollector subclasses of Collector
Date Tue, 25 Aug 2009 21:11:59 GMT


Tim Smith commented on LUCENE-1849:

bq. Out-of-order scoring is only used for top-scorers today in Lucene

I see that FilteredQuery passes "scoreDocsInOrder" down to its sub query
Is this incorrect?
seems like this could cause problems as FilteredQuery does call nextDoc/advance on its sub
query (which could be out of order because of this)

> Add OutOfOrderCollector and InOrderCollector subclasses of Collector
> --------------------------------------------------------------------
>                 Key: LUCENE-1849
>                 URL:
>             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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