lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "h t" <blueye...@gmail.com>
Subject Re: EdgeNGramTokenizer
Date Sun, 04 Nov 2007 08:32:40 GMT
http://www.shifttab.cn:8001/wiki

2007/10/31, Marco <spinmar@libero.it>:
>
> It seems that the problem is when I add the token created by
> EdgeNGramTokenizer in in the index.
> If the token contains a space (for example apple com) I have to add to
> the index with Field.Index.TOKENIZED otherwise the search cannot find it.
> If there is no space there is no problem even if I use
> Field.Index.UN_TOKENIZED.
> So I'd like to know if there is speed search difference insertinf a
> field as TOKENIZED or UN_TOKENIZED.
> Best regards
>
>
>
> Marco ha scritto:
> > Hi all,
> > I'm following the suggestion of this forum on how create a suggestion
> > service like google suggest.
> > I'm parsing a words/rank file with my words.
> > For each word, I'm adding a document with content and rank in in
> > index: then I create a EdgeNGramTokenizer of the word. This gives me N
> > words and I add each one in a new field of the index.
> > So for each word in the index I have:
> > - content (for example apple)
> > - rank
> > - X initial letters of the word (for example app)
> > - X+1 initial letters of the word (for example appl)
> > - X+2 initial letters of the word (for example apple)
> > ....
> > - Y initial letters of the word (for example app)
> >
> > I add each additional field in the index as:
> >
> > doc.add(new Field(name_gram, tn.termText(), Field.Store.NO,
> > Field.Index.UN_TOKENIZED));
> >
> > When an user search a word, for example app, I have to query the index
> > the right field.
> > I calculate the length of the input and the I query the right field
> > and the I get the content of the docs.
> > Is it ok?
> > For search I use:
> >
> > String field_ok = field + line.length(); QueryParser parser = new
> > QueryParser(field_ok, analyzer);
> > Query query = parser.parse(line);
> > System.out.println("Searching for: " + query.toString(field_ok));
> > Hits hits = searcher.search(query, new Sort("rank", true));
> >
> >
> > All is ok if the input of the user doesn't contain spaces...
> > Am I missing something?
> > Best regards
> >
> > Marco
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> > For additional commands, e-mail: java-user-help@lucene.apache.org
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message