move deletes under codec
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Key: LUCENE-3661
URL: https://issues.apache.org/jira/browse/LUCENE-3661
Project: Lucene - Java
Issue Type: Task
Affects Versions: 4.0
Reporter: Robert Muir
After LUCENE-3631, this should be easier I think.
I haven't looked at it much myself but i'll play around a bit, but at a glance:
* SegmentReader to have Bits liveDocs instead of BitVector
* address the TODO in the IW-using ctors so that SegmentReader doesn't take a
parent but just an existing core.
* we need some type of minimal "MutableBits" or similar subinterface of bits.
BitVector and maybe Fixed/OpenBitSet could implement it
* BitVector becomes an impl detail and moves to codec (maybe we have a shared
base class and split the 3.x/4.x up rather than the conditional backwards)
* I think the invertAll should not be used by IndexWriter, instead we define
the codec interface to say "give me a new MutableBits, by default all are set" ?
* redundant internally-consistent checks in checkLiveCounts should be done in
the codec impl instead of in SegmentReader.
* plain text impl in SimpleText.
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