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https://issues.apache.org/jira/browse/LUCENE-2067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12783271#action_12783271
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Simon Willnauer commented on LUCENE-2067:
-----------------------------------------
Robert, I really like the readability in combination with the pseudo code in
the paper! The tests looking very good. The only thing I do not see in the
paper is
{code}
if (len > 1 && s[len - 2] == 'e') {
s[len - 2] = s[len - 1]; // e* > *
return len - 1;
}
{code}
durin the normalize stage. Maybe I miss something in the paper or this is some
kind of optimisation. If so would you add a comment? - would make it easier!
I also see no reason why the CzechStemFilter should be none final.
> Czech Stemmer
> -------------
>
> Key: LUCENE-2067
> URL: https://issues.apache.org/jira/browse/LUCENE-2067
> Project: Lucene - Java
> Issue Type: New Feature
> Components: contrib/analyzers
> Reporter: Robert Muir
> Assignee: Robert Muir
> Priority: Minor
> Fix For: 3.1
>
> Attachments: LUCENE-2067.patch, LUCENE-2067.patch, LUCENE-2067.patch
>
>
> Currently, the CzechAnalyzer is merely stopwords, and there isn't a czech
> stemmer in snowball.
> This patch implements the light stemming algorithm described in:
> http://portal.acm.org/citation.cfm?id=1598600
> In their measurements, it improves MAP 42%
> The analyzer does not use this stemmer if LUCENE_VERSION <= 3.0, for back
> compat.
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