Would you have an example of this or be able to point me in the direction of an example at all?
Quoting Grant Ingersoll <gsing...@apache.org>: > > On Oct 20, 2010, at 4:40 PM, Martin O'Shea wrote: > > > > http://mail-archives.apache.org/mod_mbox/lucene-java-user/201010.mbox/%3c128 > > 7065863.4cb7110774...@netmail.pipex.net%3e will give you a better idea of > > what I'm moving towards. > > > > It's all a bit grey at the moment so further investigation is inevitable. > > > > I expect that a combination of MySQL database storage and Lucene indexing > is > > going to be the end result. > > I'd likely take the TermVectorMapper approach, but otherwise, yeah, I think > you are on the right track. > > > > > > > > > > -----Original Message----- > > From: Grant Ingersoll [mailto:gsing...@apache.org] > > Sent: 20 Oct 2010 21 20 > > To: java-user@lucene.apache.org > > Subject: Re: Using a TermFreqVector to get counts of all words in a > document > > > > > > On Oct 20, 2010, at 2:53 PM, Martin O'Shea wrote: > > > >> Uwe > >> > >> Thanks - I figured that bit out. I'm a Lucene 'newbie'. > >> > >> What I would like to know though is if it is practical to search a single > >> document of one field simply by doing this: > >> > >> IndexReader trd = IndexReader.open(index); > >> TermFreqVector tfv = trd.getTermFreqVector(docId, "title"); > >> String[] terms = tfv.getTerms(); > >> int[] freqs = tfv.getTermFrequencies(); > >> for (int i = 0; i < tfv.getTerms().length; i++) { > >> System.out.println("Term " + terms[i] + " Freq: " + freqs[i]); > >> } > >> trd.close(); > >> > >> where docId is set to 0. > >> > >> The code works but can this be improved upon at all? > >> > >> My situation is where I don't want to calculate the number of documents > > with > >> a particular string. Rather I want to get counts of individual words in a > >> field in a document. So I can concatenate the strings before passing it > to > >> Lucene. > > > > Can you describe the bigger problem you are trying to solve? This looks > > like a classic XY problem: http://people.apache.org/~hossman/#xyproblem > > > > What you are doing above will work OK for what you describe (up to the > > "passing it to Lucene" part), but you probably should explore the use of > the > > TermVectorMapper which provides a callback mechanism (similar to a SAX > > parser) that will allow you to build your data structures on the fly > instead > > of having to serialize them into two parallel arrays and then loop over > > those arrays to create some other structure. > > > > > > -------------------------- > > Grant Ingersoll > > http://www.lucidimagination.com > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > > For additional commands, e-mail: java-user-h...@lucene.apache.org > > > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > > For additional commands, e-mail: java-user-h...@lucene.apache.org > > > > -------------------------- > Grant Ingersoll > http://www.lucidimagination.com > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > > -- --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
