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https://issues.apache.org/jira/browse/LUCENE-3620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163673#comment-13163673
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Uwe Schindler commented on LUCENE-3620:
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Hi Shai, thats wanted that e.g. reopen/clone are not delegated. Because
reopen/openIfChanged must return a new instance of the current IndexReader
(which extends FilterIndexReader). By simply delegating it would violate this.
Just a comment to your previous mail: If you call super.reopen() you would
confuse the backwards layer (using VirtualMethod) for the transition to
doOpenIfChanged, so please don't do it. Just leave it unimplemented.
I would extends the test to add the "wanted" methods in a HashSet so it will
not check them.
- reopen(), doOpenIfChanged(), clone(): see above
- numDeletedDocs should be final in IndexReader
- deleteDocument & similar may be delegated (but i am not sure)
> FilterIndexReader does not override all of IndexReader methods
> --------------------------------------------------------------
>
> Key: LUCENE-3620
> URL: https://issues.apache.org/jira/browse/LUCENE-3620
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/search
> Reporter: Shai Erera
> Assignee: Shai Erera
> Priority: Minor
> Fix For: 3.6, 4.0
>
> Attachments: LUCENE-3620.patch
>
>
> FilterIndexReader does not override all of IndexReader methods. We've hit an
> error in LUCENE-3573 (and fixed it). So I thought to write a simple test
> which asserts that FIR overrides all methods of IR (and we can filter our
> methods that we don't think that it should override). The test is very simple
> (attached), and it currently fails over these methods:
> {code}
> getRefCount
> incRef
> tryIncRef
> decRef
> reopen
> reopen
> reopen
> reopen
> clone
> numDeletedDocs
> document
> setNorm
> setNorm
> termPositions
> deleteDocument
> deleteDocuments
> undeleteAll
> getIndexCommit
> getUniqueTermCount
> getTermInfosIndexDivisor
> {code}
> I didn't yet fix anything in FIR -- if you spot a method that you think we
> should not override and delegate, please comment.
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