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Posted to dev@lucene.apache.org by "Adrien Grand (JIRA)" <ji...@apache.org> on 2013/05/13 19:57:19 UTC

[jira] [Resolved] (LUCENE-3907) Improve the Edge/NGramTokenizer/Filters

     [ https://issues.apache.org/jira/browse/LUCENE-3907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adrien Grand resolved LUCENE-3907.
----------------------------------

    Resolution: Fixed
    
> Improve the Edge/NGramTokenizer/Filters
> ---------------------------------------
>
>                 Key: LUCENE-3907
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3907
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Adrien Grand
>              Labels: gsoc2013
>             Fix For: 4.4
>
>         Attachments: LUCENE-3907.patch
>
>
> Our ngram tokenizers/filters could use some love.  EG, they output ngrams in multiple passes, instead of "stacked", which messes up offsets/positions and requires too much buffering (can hit OOME for long tokens).  They clip at 1024 chars (tokenizers) but don't (token filters).  The split up surrogate pairs incorrectly.

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