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From Clemens Wyss <clemens...@mysign.ch>
Subject AW: Suggest search terms
Date Tue, 22 Feb 2011 10:23:03 GMT
Fernando, Uwe thanks for your suggestions. 
Is it possible to get the number of "hits" per term?
ferrari (125)
lamborghini (34)
...

> -----Urspr├╝ngliche Nachricht-----
> Von: Fernando Wasylyszyn [mailto:ferwasy@yahoo.com.ar]
> Gesendet: Montag, 21. Februar 2011 21:11
> An: java-user@lucene.apache.org
> Betreff: Re: Suggest search terms
> 
> I think that the idea that Uwe mentions is completely valid. Although it has a
> few disadvantages:
> 
> For example, what if you want to suggest "multiword suggestions" and in
> your index you have only "single word" tokens.
> 
> Query: Ferrari
> Ideal suggestions: Ferrari 354 BT, Ferrari 355 C, Ferrari 356 Index have the
> tokens: Ferrari, 354, 355, 356, BT, C
> 
> 
> 
> 
> 
> ________________________________
> De: Uwe Schindler <uwe@thetaphi.de>
> Para: java-user@lucene.apache.org
> Enviado: lunes, 21 de febrero, 2011 15:29:35
> Asunto: RE: Suggest search terms
> 
> Hi,
> 
> I just have a suggestion to your first idea of enumerating terms, which is very
> fast if done right:
> 
> > I'd like to suggest search terms to my users. My naïve approach would
> > have
> > been:
> > After at least n characters have been typed (asynchronously) find
> > terms in
> > IndexReader.terms()  which "match"
> 
> Much easier is to use IR.terms() but wrap a PrefixTermEnum around it (it's in
> search package). Then you simply iterate (please don't forget that the enum
> is already positioned on the first term!!! If no such term exists, the enum's
> term() returns null). Just use a "if (enum.term() != null) do { } while
> (enum.next()!=null && numberOfTermCollectex <= max)", with Lucene
> trunk this is much better now, but with 3.x, you have to use this ugly
> iteration.
> 
> Uwe
> 
> 
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