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From S Eslamian <seslam...@gmail.com>
Subject Re: use QueryTermExtractor for RangeQueries
Date Sat, 17 Sep 2011 05:19:47 GMT
ofcourse I do this. This is my sample cod to get terms:


PrefixQuery pq = new PrefixQuery(new Term("field","hell*"));
rewritenQuery = indexSearcher.rewrite(pq);
QueryTermExtractor qte = new QueryTermExtractor();
WeightedTerm[] wt = qte.getTerms(rewritenQuery );

and it returns nothing to me in wt!!!

On Thu, Sep 15, 2011 at 12:36 PM, Simon Willnauer <
simon.willnauer@googlemail.com> wrote:

> Hey,
>
> do you use the query you passed to rewrite to extract the terms or the
> query returned from rewrite?
>
> you should do it like this:
>
> Query q = ...
>
> q = indexSearcher.rewrite(q);
>
> ...
>
> simon
>
> On Thu, Sep 15, 2011 at 6:02 AM, S Eslamian <seslamian@gmail.com> wrote:
> > I have an instance of IndexSearcher and then call rewrite method with the
> > query.
> > IndexRear ir = IndexReader.open("directory path",true);
> > IndexSearcher indexSearcher = new IndexSearcher(ir);
> > indexSearcher.rewrite(query);
> >
> >
> > On Wed, Sep 14, 2011 at 10:03 PM, Simon Willnauer
> > <simon.willnauer@googlemail.com> wrote:
> >>
> >> how do you rewrite your query?
> >>
> >> simon
> >>
> >> On Tue, Sep 13, 2011 at 9:22 AM, S Eslamian <seslamian@gmail.com>
> wrote:
> >> > Hi
> >> > I am using QueryTermExtractor.getTerms for finding the terms of a
> given
> >> > query in lucene 3.0.3. In it's document has said that "Utility class
> >> > used to
> >> > extract the terms used in a query, plus any weights. This class will
> not
> >> > find terms for MultiTermQuery, RangeQuery and PrefixQuery classes so
> the
> >> > caller must pass a rewritten query (see Query.rewrite) to obtain a
> list
> >> > of
> >> > expanded terms.", but for these queries - MultiTermQuery, RangeQuery
> and
> >> > PrefixQuery - even rewritten query, it doesn't return the correct list
> >> > of
> >> > expanded terms.
> >> > What should I do? For example for e PrefixQuery like 'hell*' it
> returns
> >> > 'hell*' instead of " 'hell' and 'hello' and ... ";
> >> >
> >>
> >> ---------------------------------------------------------------------
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> >> For additional commands, e-mail: java-user-help@lucene.apache.org
> >>
> >
> >
>

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