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https://issues.apache.org/jira/browse/LUCENE-2854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12979174#action_12979174
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Michael McCandless commented on LUCENE-2854:
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bq. Is it possible to remove this method Query.getSimilarity also? I don't
understand why we need this method!
I would love to! But I think that's for another day...
I looked into this and got stuck with BoostingQuery, which rewrites to an anon
subclass of BQ overriding its getSimilarity in turn override its coord method.
Rather twisted... if we can do this differently I think we could remove
Query.getSimilarity.
> Deprecate SimilarityDelegator and Similarity.lengthNorm
> -------------------------------------------------------
>
> Key: LUCENE-2854
> URL: https://issues.apache.org/jira/browse/LUCENE-2854
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Michael McCandless
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-2854.patch, LUCENE-2854_fuzzylikethis.patch
>
>
> SimilarityDelegator is a back compat trap (see LUCENE-2828).
> Apps should just [statically] subclass Sim or DefaultSim; if they really need
> "runtime subclassing" then they can make their own app-level delegator.
> Also, Sim.computeNorm subsumes lengthNorm, so we should deprecate lengthNorm
> in favor of computeNorm.
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