[jira] Updated: (LUCENE-2282) Expose IndexFileNames as public, and make use of its methods in the code

["Shai Erera (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-2282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shai Erera updated LUCENE-2282:
-------------------------------

    Attachment: LUCENE-2282.patch

Patch provides:
* IFN constants and methods as public
* segmentFileName concatenates the name and extension w/ '.', using a StringBuilder. Using SB is a minor efficiency, and since the + operator on strings allocate it anyway, I figure we'd better allocate it directly, especially when two + operators are involved.
* matchesExtension checks whether a filename matches an extension
* fileNameFromGeneration adds the '.' when neccessary.
* Core code does not concatenate file, '.' and extension on its own, but uses IFN.

All core tests pass. I have a local problem w/ contrib tests (the Analyzers data dir is locked for some reason and I cannot unlock it), but I see no reasons for them to fail.

If this can go out in 3.0.2 instead of waiting for 3.1, then all the better.

> Expose IndexFileNames as public, and make use of its methods in the code
> ------------------------------------------------------------------------
>
>                 Key: LUCENE-2282
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2282
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Shai Erera
>             Fix For: 3.1
>
>         Attachments: LUCENE-2282.patch
>
>
> IndexFileNames is useful for applications that extend Lucene, an in particular those who extend Directory or IndexWriter. It provides useful constants and methods to query whether a certain file is a core Lucene file or not. In addition, IndexFileNames should be used by Lucene's code to generate segment file names, or query whether a certain file matches a certain extension.
> I'll post the patch shortly.

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