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https://issues.apache.org/jira/browse/LUCENE-1507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12667496#action_12667496
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Uwe Schindler commented on LUCENE-1507:
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I like this, it would be good to make memory effective filters where you know,
that the set is empty from the beginning (like a RangeFilter with max<min).
Instead of creating a empty OpenBitSet, one could return this.
I would put this class in o.a.l.util.
> adding EmptyDocIdSet/Iterator
> -----------------------------
>
> Key: LUCENE-1507
> URL: https://issues.apache.org/jira/browse/LUCENE-1507
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Affects Versions: 2.4
> Reporter: John Wang
> Attachments: emptydocidset.txt
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> Adding convenience classes for EmptyDocIdSet and EmptyDocIdSetIterator
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