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https://issues.apache.org/jira/browse/LUCENE-3084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032271#comment-13032271
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Simon Willnauer commented on LUCENE-3084:
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bq. Let's stop subclassing random things? : ) SIS can contain a List of SIs
(and maybe a Set, or whatever we need in the future), and only expose
operations its clients really need
+1 we should if at all implement Iterable<SegmentInfo> instead of vector or
arraylist.
bq. I would love to cutover to Set<SI>, but, I don't think we can. There are
apps out there that want merges to remain contiguous (so docIDs keep their
monotonicity).
I think this should be feasible with a sorted set? It might make sense is the
SIS case to hold a NavigableSet and I personally would prever that much over
subclassing some random collection. If we refactor this we should refactor
towards an interface not an implementation.
> MergePolicy.OneMerge.segments should be List<SegmentInfo> not SegmentInfos
> --------------------------------------------------------------------------
>
> Key: LUCENE-3084
> URL: https://issues.apache.org/jira/browse/LUCENE-3084
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 3.2, 4.0
>
> Attachments: LUCENE-3084-trunk-only.patch,
> LUCENE-3084-trunk-only.patch, LUCENE-3084.patch
>
>
> SegmentInfos carries a bunch of fields beyond the list of SI, but for merging
> purposes these fields are unused.
> We should cutover to List<SI> instead.
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