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https://issues.apache.org/jira/browse/LUCENE-4057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13274695#comment-13274695
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Michael McCandless commented on LUCENE-4057:
--------------------------------------------
+1
> Add Codec.merge()
> -----------------
>
> Key: LUCENE-4057
> URL: https://issues.apache.org/jira/browse/LUCENE-4057
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 4.0
> Reporter: Robert Muir
> Fix For: 4.1
>
>
> Currently individual codec components can override/optimize merging, e.g. the
> stored fields impl
> uses bulk copying when possible, and so on.
> SegmentMerger contains the logic for merging the different codec components,
> for example it does
> mergeFieldInfos(), then mergeFields(), mergeTerms(), and so on. Each of these
> methods interacts
> with the codec apis to finish the merge.
> I think it would be cleaner if SegmentMerger called a new method,
> Codec.merge(), which contained
> this logic instead. This way someone could customize this process. I think we
> could probably even
> push some of the impl-dependent stuff (like matchingSegmentReaders) into the
> impl and out of SegmentMerger.
> Setting this for 4.1, I think it would be a nice cleanup but I don't plan on
> working on this immediately,
> and I think we can do this in a backwards compatible way in a minor release.
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