[jira] Commented: (LUCENE-1507) adding EmptyDocIdSet/Iterator

["Uwe Schindler (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-1507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12667496#action_12667496 ] 

Uwe Schindler commented on LUCENE-1507:
---------------------------------------

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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