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https://issues.apache.org/jira/browse/LUCENE-2236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12982279#action_12982279
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Simon Willnauer commented on LUCENE-2236:
-----------------------------------------

Nice work robert, while I only looked briefly at this patch but I wonder why 
SimilarityProvider is an interface while it could be an abstract class. Adding 
methods later to an abstract class is much easier than to an interface though. 
I hope I can have a closer look at this patch soon!



> Similarity can only be set per index, but I may want to adjust scoring 
> behaviour at a field level
> -------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-2236
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2236
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Query/Scoring
>    Affects Versions: 3.0
>            Reporter: Paul taylor
>            Assignee: Robert Muir
>         Attachments: LUCENE-2236.patch
>
>
> Similarity can only be set per index, but I may want to adjust scoring 
> behaviour at a field level, to faciliate this could we pass make field name 
> available to all score methods.
> Currently it is only passed to some such as lengthNorm() but not others such 
> as tf()

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