TermVectors are only available when enabled for the field/document. ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de
> -----Original Message----- > From: Martin O'Shea [mailto:app...@dsl.pipex.com] > Sent: Wednesday, October 20, 2010 8:23 PM > To: java-user@lucene.apache.org > Subject: Using a TermFreqVector to get counts of all words in a document > > Hello > > > > I am trying to use a TermFreqVector to get a count of all words in a Document > as follows: > > > > // Search. > > int hitsPerPage = 10; > > IndexSearcher searcher = new IndexSearcher(index, true); > > TopScoreDocCollector collector = > TopScoreDocCollector.create(hitsPerPage, true); > > searcher.search(q, collector); > > ScoreDoc[] hits = collector.topDocs().scoreDocs; > > > > // Display results. > > int docId = 0; > > System.out.println("Found " + hits.length + " hits."); > > for (int i = 0; i < hits.length; ++i) { > > docId = hits[i].doc; > > Document d = searcher.doc(docId); > > System.out.println((i + 1) + ". " + d.get("title")); > > IndexReader trd = IndexReader.open(index); > > TermFreqVector tfv = trd.getTermFreqVector(docId, "title"); > > System.out.println(tfv.getTerms().toString()); > > System.out.println(tfv.getTermFrequencies().toString()); > > } > > > > The code is very rough as its only an experiment but I'm under the impression > that the getTerms and getTermFrequencies methods for a TermFreqVector > should allow each word and its frequency in the document to be displayed. All I > get though is a NullPointerError. The index consists of a single document made > up of a simple string: > > > > IndexWriter w = new IndexWriter(index, analyzer, true, > IndexWriter.MaxFieldLength.UNLIMITED); > > addDoc(w, "Lucene for Dummies"); > > > > And the queryString being used is simply "dummies". > > > > Thanks > > > > Martin O'Shea. --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
