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From "Otis Gospodnetic (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-682) QueryParser with Locale Based Operators (French included)
Date Thu, 26 Oct 2006 04:11:17 GMT
    [ http://issues.apache.org/jira/browse/LUCENE-682?page=comments#action_12444776 ] 
            
Otis Gospodnetic commented on LUCENE-682:
-----------------------------------------

I like this and have a question.  The createLocalizedTokenMap() method is called from that
new setter method.
Since QueryParser is not thread safe, one has to instantiate a new QP, set the Locale and
call that setter before each parse(....) call.  Unless ResourceBundle does some internal caching,
doesn't this mean each parsed query will execute that createLocalizedTokenMap() method?  Since
the resource files are not likely to change, shouldn't we cache things?



> QueryParser with Locale Based Operators (French included)
> ---------------------------------------------------------
>
>                 Key: LUCENE-682
>                 URL: http://issues.apache.org/jira/browse/LUCENE-682
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: QueryParser
>            Reporter: Patrick Turcotte
>            Priority: Minor
>         Attachments: LocalizedQueryParserDemo.java, QueryParser.jj, QueryParser.jj.patch,
QueryParser.properties, QueryParser_fr.properties, TestQueryParserLocaleOperators.java
>
>
> Here is a version of the QueryParser that can "understand" the AND, OR and NOT keyword
in other languages.
> If activated, 
> - "a ET b" should return the same query as "a AND b", namely: "+a +b"
> - "a OU b" should return the same query as "a OR b", namely: "a b"
> - "a SAUF b" should return the same query as "a NOT b", namely: "a -b"
> Here are its main points : 
> 1) Patched from revision 454774 of lucene 2.1dev (trunk) (probably could be used with
other versions)
> 2) The "ant test" target is still successful when the modified QueryParser is used
> 3) It doesn't break actual code
> 4) The default behavior is the same as before
> 5) It has to be deliberately activated
> 6) It use ResourceBundle to find the keywords translation
> 7) Comes with FRENCH translation
> 8) Comes with JUnit testCases
> 9) Adds 1 public method to QueryParser
> 10) Expands the TOKEN <TERM>
> 11) Use TOKEN_MGR_DECLS to set some field for the TokenManager

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