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From "Dawid Weiss (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4321) java.io.FilterReader considered harmful
Date Wed, 22 Aug 2012 15:27:42 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13439609#comment-13439609
] 

Dawid Weiss commented on LUCENE-4321:
-------------------------------------

So there was a bug hidden in that filterreader class hierarchy change? Nice ;) 
                
> java.io.FilterReader considered harmful
> ---------------------------------------
>
>                 Key: LUCENE-4321
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4321
>             Project: Lucene - Core
>          Issue Type: Bug
>    Affects Versions: 4.0-BETA
>            Reporter: Robert Muir
>             Fix For: 5.0, 4.0
>
>         Attachments: LUCENE-4321.patch, LUCENE-4321.patch, LUCENE-4321.patch, LUCENE-4321.patch,
LUCENE-4321.patch
>
>
> See Dawid's email: http://find.searchhub.org/document/64b0a28c53faf39
> Reader.java is fine, it has lots of methods like read(), read(char[]), read(CharBuffer),
skip(), but these all have default implementations delegating to read(char[], int, int).
> Unfortunately FilterReader delegates too many unnecessary things such as read() and skip()
in a broken way. It should have just left these alone.
> This can cause traps for someone upgrading because they have to override multiple methods,
when read(char[], int, int) should be enough, and all Reader methods will then work correctly.

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