[jira] [Updated] (SOLR-2792) Allow case insensitive Hunspell stemming

["Jan Høydahl (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-2792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jan Høydahl updated SOLR-2792:
------------------------------

    Attachment: SOLR-2792.patch

First attempt on patch. It works, and I added an -i option to the command-line version of HunspellStemmer so that we can test ignoreCase easily.

I also added an optional ignoreCaseLocale to specify the locale for lowercasing, but this only works for String#toLowerCase, while the lowercasing in CharArrayMap#equals uses plain Character#toLowerCase.

> Allow case insensitive Hunspell stemming
> ----------------------------------------
>
>                 Key: SOLR-2792
>                 URL: https://issues.apache.org/jira/browse/SOLR-2792
>             Project: Solr
>          Issue Type: Improvement
>          Components: Schema and Analysis
>    Affects Versions: 3.5, 4.0
>            Reporter: Jan Høydahl
>            Assignee: Jan Høydahl
>         Attachments: SOLR-2792.patch
>
>
> Same as http://code.google.com/p/lucene-hunspell/issues/detail?id=3
> Hunspell dictionaries are by nature case sensitive. The Hunspell stemmer thus needs an option to allow case insensitive matching of the dictionaries.
> Imagine a query for "microsofts". It will never be stemmed to the dictionary word "Microsoft" because of the case difference. This problem cannot be fixed by putting LowercaseFilter before Hunspell.

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