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From Ramprakash Ramamoorthy <youngestachie...@gmail.com>
Subject Re: WildCardTermEnum in Lucene 4.1
Date Tue, 26 Mar 2013 05:32:05 GMT
On Thu, Mar 21, 2013 at 4:17 PM, Uwe Schindler <uwe@thetaphi.de> wrote:

> You can do the following:
>
> Automaton automaton = WildcardQuery.toAutomaton(wildcardTerm); // this
> transforms the wildcard syntax with ? and * to a state machine
> CompiledAutomaton compiled = new CompiledAutomaton(automaton); // copiles
> the state machine
> TermsEnum enum = compiled.getTermsEnum(terms); // "terms" can be retrieved
> from AtomicReader
>
> The old WildcardTermsEnum no longer exists, because you can create a
> finite state meachine from every wildcard or regexp. The automaton support
> is part of Lucene's term dictionary, so the above code uses the index
> reader to get the filtered terms.
>
> The above code was copied from WildCardQuery and its superclass
> AutomatonQuery.
>
> Uwe
>

Thank you Uwe. It worked!

>
> -----
> Uwe Schindler
> H.-H.-Meier-Allee 63, D-28213 Bremen
> http://www.thetaphi.de
> eMail: uwe@thetaphi.de
>
> > -----Original Message-----
> > From: Ramprakash Ramamoorthy [mailto:youngestachiever@gmail.com]
> > Sent: Thursday, March 21, 2013 11:31 AM
> > To: java-user@lucene.apache.org
> > Subject: WildCardTermEnum in Lucene 4.1
> >
> > Team,
> >
> >        We are in the process of migrating our codebase from lucene
> 2.3(Yeah, its
> > way older) to lucene 4.1. We had previously used WildCardTermEnum
> > <http://lucene.apache.org/core/old_versioned_docs/versions/3_0_3/api/all
> > /org/apache/lucene/search/WildcardTermEnum.html>
> > in
> > our code base.
> >
> >        I don't find this in 4.1 and did some googling, but in vein. May
> be some
> > one can help with the equivalent of this WildCardTermEnum in 4.1?
> > Thanks in advance.
> >
> > --
> > With Thanks and Regards,
> > Ramprakash Ramamoorthy,
> > India,
> > +91 9626975420
>
>
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>


-- 
With Thanks and Regards,
Ramprakash Ramamoorthy,
India,
+91 9626975420

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