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https://issues.apache.org/jira/browse/LUCENE-1476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12662102#action_12662102
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Michael McCandless commented on LUCENE-1476:
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{quote}
> How about if we model deletions-as-iterator on BitSet.nextSetBit(int tick)
> instead of a true iterator that keeps state?
{quote}
That works if under-the-hood it's a non-sparse representation. But if it's
sparse, you need an iterator (state) to remember where you are.
> BitVector implement DocIdSet
> ----------------------------
>
> Key: LUCENE-1476
> URL: https://issues.apache.org/jira/browse/LUCENE-1476
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 2.4
> Reporter: Jason Rutherglen
> Priority: Trivial
> Attachments: LUCENE-1476.patch
>
> Original Estimate: 12h
> Remaining Estimate: 12h
>
> BitVector can implement DocIdSet. This is for making
> SegmentReader.deletedDocs pluggable.
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