Re: [Xtf-user] Java code to query index

[Martin H. <m1...@sn...>]

Oh, one more note... a fun tool to browse your XTF index (or any Lucene
index) is Luke. It might overwhelm you with details, but at least you can
see everything:

http://www.getopt.org/luke/

--Martin


On 11/10/05, Martin Haye <m1...@sn...> wrote:
>
> Giulia,
>
> This will be fairly simple. You can open the index directly in Lucene, an=
d
> the field names you specify in your index prefilter are the same inside t=
he
> Lucene index. One other thing you need to know: to get the document name,
> retrieve the 'key' field... this will be the index name, a ":", and the
> relative path from the data directory to the document.
>
> In rough pseudo-code, I think your program will look like this:
>
>  String yourIndexDirectory;
> String arkToSearchFor;
> ...
>  IndexReader reader =3D IndexReader.open(yourIndexDirectory);
>  Searcher searcher =3D new IndexSearcher(reader);
> Analyzer analyzer =3D new StandardAnalyzer();
> Query query =3D QueryParser.parse(arkToSearchFor, "ark", analyzer);
>  Hits hits =3D searcher.search(query);
>
> // Should be one hit if ark was found, zero if not.
> if(hits.length() > 1) {
>  Document doc =3D hits.doc(0);
> String key =3D doc.get("key");
> // work on key here...
> }
>  reader.close();
>
> Hopefully this answers your question. If not, let me know.
>
> --Martin
>
> On 11/10/05, Giulia Hill <gh...@li... > wrote:
> >
> >
> > Martin, Kirk,
> >
> > this is only somehow tangential to xtf.
> >
> > I want to query directly the Lucene index to retrieve a field which I'l=
l
> > be indexing with a java routine which will be an additional piece to ou=
r
> >
> > XTF installation. Basically I'll create an index for ARK's within XTF
> > which I want to query from one of my other serlvets.
> >
> > Do you have an example on which I can build? For one think it was not
> > clear to me the naming of the indexes that are created during indexing,
> > and, consequently which one to use in the Lucene API. The query for
> > which
> > I want to create the code is pretty simple: given an ARK, I want to get
> > back the doc name.
> >
> > Thanks,
> >
> > Giulia
> >
> >
> >
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>