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From "Paul Elschot (JIRA)" <>
Subject [jira] Commented: (LUCENE-2628) Extract OpenBitSet to Apache Commons
Date Sun, 29 Aug 2010 09:30:54 GMT


Paul Elschot commented on LUCENE-2628:

Using an interface for DocIdSet would freeze DocIdSet forever and that would not be advisable.

Nowadays the JITs might allow the use of delegation instead of inheritance without losing
so one might reasonably try to delegate to OBS to avoid freezing DocIdSet. That would involve
an extra class, but an extra class should be no problem.

> Extract OpenBitSet to Apache Commons
> ------------------------------------
>                 Key: LUCENE-2628
>                 URL:
>             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 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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