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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1689) supplementary character handling
Date Sat, 13 Jun 2009 20:10:07 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12719179#action_12719179
] 

Yonik Seeley commented on LUCENE-1689:
--------------------------------------

bq. onik, I think the problem is where method signatures must change, such as CharTokenizer,
required to fix LetterTokenizer and friends. 

Ah, OK.  Actually it just occurred to me that this would also require reindexing, otherwise
queries that hit documents in the past would mysteriously start missing them (for text outside
the BMP).


> supplementary character handling
> --------------------------------
>
>                 Key: LUCENE-1689
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1689
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Robert Muir
>            Priority: Minor
>             Fix For: 3.1
>
>         Attachments: LUCENE-1689_lowercase_example.txt
>
>
> for Java 5. Java 5 is based on unicode 4, which means variable-width encoding.
> supplementary character support should be fixed for code that works with char/char[]
> For example:
> StandardAnalyzer, SimpleAnalyzer, StopAnalyzer, etc should at least be changed so they
don't actually remove suppl characters, or modified to look for surrogates and behave correctly.
> LowercaseFilter should be modified to lowercase suppl. characters correctly.
> CharTokenizer should either be deprecated or changed so that isTokenChar() and normalize()
use int.
> in all of these cases code should remain optimized for the BMP case, and suppl characters
should be the exception, but still work.

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