Mailing-List: contact dev-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@lucene.apache.org
Date: Sun, 29 Apr 2012 09:58:51 +0000 (UTC)
From: "Oliver Schihin (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Message-ID: 
 <1971986105.7294.1335693531609.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <1361265634.14930.1322412880286.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Updated] (SOLR-2921) Make any Filters, Tokenizers and
 CharFilters implement MultiTermAwareComponent if they should
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


     [ https://issues.apache.org/jira/browse/SOLR-2921?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Oliver Schihin updated SOLR-2921:
---------------------------------

    Comment: was deleted

(was: Am I off topic, or is ICUCollationKeyFilterFactory a candidate, as well?)
    
> Make any Filters, Tokenizers and CharFilters implement MultiTermAwareComponent if they should
> ---------------------------------------------------------------------------------------------
>
>                 Key: SOLR-2921
>                 URL: https://issues.apache.org/jira/browse/SOLR-2921
>             Project: Solr
>          Issue Type: Improvement
>          Components: Schema and Analysis
>    Affects Versions: 3.6, 4.0
>         Environment: All
>            Reporter: Erick Erickson
>            Assignee: Erick Erickson
>            Priority: Minor
>             Fix For: 3.6, 4.0
>
>         Attachments: SOLR-2921-3x.patch, SOLR-2921-3x.patch, SOLR-2921-3x.patch, SOLR-2921-trunk.patch, SOLR-2921_rest.patch
>
>
> SOLR-2438 creates a new MultiTermAwareComponent interface. This allows Solr to automatically assemble a "multiterm" analyzer that does the right thing vis-a-vis transforming the individual terms of a multi-term query at query time. Examples are: lower casing, folding accents, etc. Currently (27-Nov-2011), the following classes implement MultiTermAwareComponent:
>  * ASCIIFoldingFilterFactory
>  * LowerCaseFilterFactory
>  * LowerCaseTokenizerFactory
>  * MappingCharFilterFactory
>  * PersianCharFilterFactory
> When users put any of the above in their query analyzer, Solr will "do the right thing" at query time and the perennial question users have, "why didn't my wildcard query automatically lower-case (or accent fold or....) my terms?" will be gone. Die question die!
> But taking a quick look, for instance, at the various FilterFactories that exist, there are a number of possibilities that *might* be good candidates for implementing MultiTermAwareComponent. But I really don't understand the correct behavior here well enough to know whether these should implement the interface or not. And this doesn't include other CharFilters or Tokenizers.
> Actually implementing the interface is often trivial, see the classes above for examples. Note that LowerCaseTokenizerFactory returns a *Filter*, which is the right thing in this case.
> Here is a quick cull of the Filters that, just from their names, might be candidates. If anyone wants to take any of them on, that would be great. If all you can do is provide test cases, I could probably do the code part, just let me know.
> ArabicNormalizationFilterFactory
> GreekLowerCaseFilterFactory
> HindiNormalizationFilterFactory
> ICUFoldingFilterFactory
> ICUNormalizer2FilterFactory
> ICUTransformFilterFactory
> IndicNormalizationFilterFactory
> ISOLatin1AccentFilterFactory
> PersianNormalizationFilterFactory
> RussianLowerCaseFilterFactory
> TurkishLowerCaseFilterFactory

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org