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From "David Mason (Commented) (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3979) NGramTokenizer
Date Fri, 13 Apr 2012 03:55:42 GMT


David Mason commented on LUCENE-3979:

I'm happy to submit a patch for this, but haven't done so for this or similar projects so
will take a while to go through the wiki and get set up to make a patch.
> NGramTokenizer
> --------------
>                 Key: LUCENE-3979
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: modules/analysis
>    Affects Versions: 2.9.2, 3.0
>         Environment: n/a
>            Reporter: David Mason
>            Priority: Minor
>              Labels: tokenizer, whitespace
>   Original Estimate: 5m
>  Remaining Estimate: 5m
> org.apache.lucene.analysis.ngram.NGramTokenizer removes whitespace, making a search for
literal strings like " test" and "test " equivalent to "test". Searching with relevant whitespace
is sometimes desired, particularly where ngrams are used.
> This could be fixed by either removing .trim() from the line shown below, or by providing
a flag to specifically set trimming behaviour (keeping trim=true as the default so that existing
code using this analyzer is not broken).
> 111: inStr = new String(chars).trim();  // remove any trailing empty strings 

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