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From "Simon Willnauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2094) Prepare CharArraySet for Unicode 4.0
Date Tue, 24 Nov 2009 15:57:39 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12781994#action_12781994
] 

Simon Willnauer commented on LUCENE-2094:
-----------------------------------------

bq. It would not hurt, the Set is only used for analyzers that all take a version param...
It is not really a public API. 
So the thing here is that lowercasing for supplementary characters does only apply to a hand
ful of chars see this link http://unicode.org/cldr/utility/list-unicodeset.jsp?a=[[%3ACase_Sensitive%3DTrue%3A]%26[^[\u0000-\uFFFF]]]&esc=on
Those characters are from the Deseret Alphabet (mormons) which means we are introducing a
"pain in the neck" Version flag into CharArraySet for about 40 chars which would be broken?!
I don't see this here! Nothing personal related to the Deseret Alphabet or anyone who is using
it but this seem a bit too much of a hassle. It would make the code very ugly though.

simon

 

> Prepare CharArraySet for Unicode 4.0
> ------------------------------------
>
>                 Key: LUCENE-2094
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2094
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Analysis
>    Affects Versions: 1.9, 2.0.0, 2.1, 2.2, 2.3, 2.3.1, 2.3.2, 2.3.3, 2.4, 2.4.1, 2.4.2,
2.9, 2.9.1, 2.9.2, 3.0, 3.0.1, 3.1
>            Reporter: Simon Willnauer
>             Fix For: 3.1
>
>         Attachments: LUCENE-2094.txt, LUCENE-2094.txt, LUCENE-2094.txt
>
>
> CharArraySet does lowercaseing if created with the correspondent flag. This causes that
 String / char[] with uncode 4 chars which are in the set can not be retrieved in "ignorecase"
mode.

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