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https://issues.apache.org/jira/browse/LUCENE-2011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12770508#action_12770508
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Uwe Schindler commented on LUCENE-2011:
---------------------------------------

{quote}
*cough* hack *cough*.
If we went this way, we should prob also hack termweight#explain too so that i 
can still use the cache.
{quote}

The cache was of no use for TermWeight.explain, because the explain method 
created a new Scorer.

> Remove deprecated Scorer.explain(int) method
> --------------------------------------------
>
>                 Key: LUCENE-2011
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2011
>             Project: Lucene - Java
>          Issue Type: Task
>          Components: Search
>            Reporter: Uwe Schindler
>             Fix For: 3.0
>
>         Attachments: LUCENE-2011.patch, LUCENE-2011.patch
>
>
> This is the only remaining deprecation in core, but is not so easy to handle, 
> because lot's of code in core still uses the explain() method in Scorer. So 
> e.g. in PhraseQuery, the explain method has to be moved from Scorer to the 
> Weight.

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