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https://issues.apache.org/jira/browse/LUCENE-3687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13186338#comment-13186338
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Simon Willnauer commented on LUCENE-3687:
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bq. If we are going to have separate classes, then norm should be abstract and
the codec should provide the implementation. But we need a real use case as to
why a codec would need to customize the implementation of Norm to justify this.
maybe we should. if a user wants to do crazy stuff with norms ie. use packed
ints for norms or var length bytes they should be able the do this ie return a
different type then we do right now?
> Allow similarity to encode norms other than a single byte
> ---------------------------------------------------------
>
> Key: LUCENE-3687
> URL: https://issues.apache.org/jira/browse/LUCENE-3687
> Project: Lucene - Java
> Issue Type: New Feature
> Components: core/index, core/search
> Affects Versions: 4.0
> Reporter: Simon Willnauer
> Fix For: 4.0
>
> Attachments: LUCENE-3687.patch, LUCENE-3687.patch, LUCENE-3687.patch
>
>
> LUCENE-3628 cut over norms to docvalues. This removes the long standing
> limitation that norms are a single byte. Yet, we still need to expose this
> functionality to Similarity to write / encode norms in a different format.
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