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https://issues.apache.org/jira/browse/LUCENE-2628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12904386#action_12904386
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Robert Muir commented on LUCENE-2628:
-------------------------------------

bq. FWIW: I can ... the snag robert ran into in SOLR-2034. we don't want SolrJ 
to have a dependency on lucene-core, but it would be nice to re-use the UTF-8 
serialization code instead of duplicating it

But maybe not, the stuff in unicodeutil isnt the best there anyway as its doing 
either:
* incremental conversion [and wasting cpu updating useless offsets]
* computing terms hash as it goes [and wasting cpu computing useless hash codes]


> Extract OpenBitSet to Apache Commons
> ------------------------------------
>
>                 Key: LUCENE-2628
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2628
>             Project: Lucene - Java
>          Issue Type: Wish
>            Reporter: Stu Hood
>
> o.a.l.util.OpenBitSet is a great alternative to java.util.BitSet, and it is 
> generally useful outside of the search field. It would be great if OpenBitSet 
> were available outside of Lucene proper, perhaps as part of Apache Commons.
> Aside from the communication required to accomplish this, there is the small 
> issue of OpenBitSet extending o.a.l.search.DocIdSet in Lucene 3.0. There is 
> very little logic contained in DocIdSet, so it could probably become an 
> interface: Lucene proper could then extend the extract version of OpenBitSet 
> to implement DocIdSet.

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