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https://issues.apache.org/jira/browse/LUCENE-2404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-2404:
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    Fix Version/s: 4.0.0

> Improve speed of ThaiWordFilter by CharacterIterator, factor out LowerCasing 
> and also fix some bugs (empty tokens stop iteration)
> ---------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-2404
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2404
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: contrib/analyzers
>            Reporter: Uwe Schindler
>            Assignee: Uwe Schindler
>             Fix For: 3.1, 4.0.0
>
>         Attachments: LUCENE-2404-2.patch, LUCENE-2404-2.patch, 
> LUCENE-2404.patch, LUCENE-2404.patch
>
>
> The ThaiWordFilter creates new Strings out of term buffer before passing to 
> The BreakIterator., But BreakIterator can take a CharacterIterator and 
> directly process on it without buffer copying.
> As Java itsself does not provide a CharacterIterator implementation in 
> java.text, we can use the javax.swing.text.Segment class, that operates on a 
> char[] and is even reuseable! This class is very strange but it works and is 
> in JDK 1.4+ and not deprecated.
> The filter also had a bug: It stopped iterating tokens when an empty token 
> occurred. Also the lowercasing for non-thai words was removed and put into 
> the Analyzer by adding LowerCaseFilter.

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