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https://issues.apache.org/jira/browse/LUCENE-5167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13737026#comment-13737026
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Robert Muir commented on LUCENE-5167:
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Thanks for opening the issue Ross,
I looked, the trickier part seems to be how to allow the users of this to get
AtomicReader on each segment transition.
Currently, the idea is SimilarityBase hides a lot of this complexity (presents
a simple stateless API over the more advanced stateful api): but in addition to
passing docid, users will need a way to grab things like DocValues from each
segment to make it useful...
> SimilarityBase does not pass docId in the score method for use of FieldCache
> or DocValues
> -----------------------------------------------------------------------------------------
>
> Key: LUCENE-5167
> URL: https://issues.apache.org/jira/browse/LUCENE-5167
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/query/scoring
> Affects Versions: 4.0, 4.1, 4.2, 4.4, 4.3.1
> Reporter: Ross Woolf
>
> SimilarityBase does not pass docId in the score method for use of FieldCache
> or DocValues.
> If the intent of extending SimilarityBase is to use a FieldCache or
> NumericDocValuesField as part of the scoring, this is not possible because
> SimilarityBase does not pass on the docId as one of the parameters of the
> score method. This parameter should be added to the score method so that
> fieldCache or NumericDocValues can be used when extending SimilarityBase.
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