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https://issues.apache.org/jira/browse/LUCENE-3606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13162424#comment-13162424
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Uwe Schindler commented on LUCENE-3606:
---------------------------------------
Committed removal of IndexReader.deleteDocument*() and undeleteAll() to branch
in revision: 1210153:
- Removal of those methods from abstract IR and all its implementations, except
SegmentReader
- SegmentReader only contains doDelete(in) implementation (as used by
BufferedDeletes & Co from IW
- Rewritten lots of tests to use IW.deleteDocuments(Term), some tests commented
out and noncommit added - some of them I dont even understand!
- Contrib/MultiPassIndexSplitter.FakeDeletesIndexReader has a package-private
delete/undelete operating on the FixedBitSet
> Make IndexReader really read-only in Lucene 4.0
> -----------------------------------------------
>
> Key: LUCENE-3606
> URL: https://issues.apache.org/jira/browse/LUCENE-3606
> Project: Lucene - Java
> Issue Type: Task
> Components: core/index
> Affects Versions: 4.0
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
>
> As we change API completely in Lucene 4.0 we are also free to remove
> read-write access and commits from IndexReader. This code is so hairy and
> buggy (as investigated by Robert and Mike today) when you work on
> SegmentReader level but forget to flush in the DirectoryReader, so its better
> to really make IndexReaders readonly.
> Currently with IndexReader you can do things like:
> - delete/undelete Documents -> Can be done by with IndexWriter, too (using
> deleteByQuery)
> - change norms -> this is a bad idea in general, but when we remove norms at
> all and replace by DocValues this is obsolete already. Changing DocValues
> should also be done using IndexWriter in trunk (once it is ready)
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