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https://issues.apache.org/jira/browse/LUCENE-6601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14601428#comment-14601428
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Adrien Grand commented on LUCENE-6601:
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The contract of the Query API is that you first need to call rewrite as long as 
rewrite returns a different query (see IndexSearcher.rewrite), and this will 
give you a Query that supports createWeight. So in this particular case, I 
think we just need to make sure to call rewrite first? I already committed such 
a change and it makes the test pass, please let me know if it somehow changes 
the behaviour of this HashQParser in an undesired way?

> Change FilteredQuery.FilterStrategy to use the two-phase iteration API
> ----------------------------------------------------------------------
>
>                 Key: LUCENE-6601
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6601
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>             Fix For: 5.3
>
>         Attachments: LUCENE-6601.patch
>
>
> We could change FilterStrategy so that instead of being a factory of scorers, 
> it would just rewrite filters in such a way that they can decide which of the 
> iterator or random-access API should be used.



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