Thanks, I missed that. And the API doc fails to mention it, though it is pretty standard for a next() method.
> -----Original Message----- > From: Michael McCandless [mailto:luc...@mikemccandless.com] > Sent: Thursday, May 17, 2012 6:20 PM > To: java-user@lucene.apache.org > Subject: Re: NullPointerException using IndexReader.termDocs when there > are no matches > > I think you need to pay attention to what td.next() returned; I > suspect in your case it returned false which means you cannot use any > of its APIs (.doc(), .freq(), etc.) after that. > > Mike McCandless > > http://blog.mikemccandless.com > > On Thu, May 17, 2012 at 5:52 PM, Edward W. Rouse > <ero...@comsquared.com> wrote: > > Lucene 3.6, java 1.6 I get the following: > > > > java.lang.NullPointerException at > > > org.apache.lucene.index.DirectoryReader$MultiTermDocs.doc(DirectoryRead > er.ja > > va:1179) > > > > when running this code: > > > > IndexReader reader = this.getReader(index); > > int d = -1; > > TermDocs td = reader.termDocs(this.createIdTerm(id)); > > if(td != null) > > { > > td.next(); > > d = td.doc(); > > } > > > > private Term createIdTerm(String id) > > { > > return new Term(Constants.DEFAULT_ID_FIELD, id); > > } > > > > At the time this code runs I would expect that td would be null since > there > > are no documents in the index that match the term, but that is not > the case. > > Instead I get the NPE when trying td.doc(). I can wrap the code in a > > try/catch for that line, but I think there must be a better way to > determine > > if I got any matches for a Term. > > > > Edward W. Rouse > > Comsquared System, Inc. > > 770-734-5301 > > > > > > > > > > --------------------------------------------------------------------- > > 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 --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
