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https://issues.apache.org/jira/browse/LUCENE-1131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628953#action_12628953
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Michael McCandless commented on LUCENE-1131:
--------------------------------------------
Hmm -- this breaks back compat (adds new abstract method to IndexReader).
Why don't we fallback to default impl, in IndexReader, of maxDoc() - numDocs()?
Patch is much less invasive, and, we don't break back compat? maxDoc() is
indeed cheap.
> Add numDeletedDocs to IndexReader
> ---------------------------------
>
> Key: LUCENE-1131
> URL: https://issues.apache.org/jira/browse/LUCENE-1131
> Project: Lucene - Java
> Issue Type: New Feature
> Reporter: Shai Erera
> Assignee: Otis Gospodnetic
> Priority: Minor
> Fix For: 2.4
>
> Attachments: LUCENE-1131.patch
>
>
> Add numDeletedDocs to IndexReader. Basically, the implementation is as simple
> as doing:
> public int numDeletedDocs() {
> return deletedDocs == null ? 0 : deletedDocs.count();
> }
> in SegmentReader.
> Patch to follow to include in all IndexReader extensions.
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