Hi, Although the JavaDoc states that you can pass in a null resource, looks like it causes the null pointer exception later.
Please try passing an empty map instead of null. Open a Jira issue so we can improve it. Thank you, William On Thu, Mar 8, 2012 at 6:28 PM, Jim - FooBar(); <[email protected]>wrote: > I should clarify that i 'm using the latest code from svn... > > Any ideas? > > > > On 08/03/12 16:10, Dimitrios wrote: > >> Hi everyone, >> >> Can someone please explain why i 'm getting this NPE when trying to use >> the TokenNameFinderCrossValidator? >> TokenNameFinderEvaluator seems to be working just fine but because i've >> got very little training-data i'd like to do cross-validation as well... >> >> *The code is as follows:* >> >> public String cross-validate(String fname, int kFolds){ >> >> FileInputStream sampleDataIn = new FileInputStream(fname); >> ObjectStream<NameSample> sampleStream = new NameSampleDataStream( >> >> new PlainTextByLineStream( >> >> sampleDataIn.getChannel(), "UTF-8")); >> TokenNameFinderCrossValidator judge = new TokenNameFinderCrossValidator(* >> *"en", >> >> null, >> >> new TrainingParameters(), >> >> null, >> >> null, >> >> null); >> judge.evaluate(sampleStream, kFolds); >> FMeasure result = evaluator.getFMeasure(); >> return result.toString(); >> >> } >> >> *The exception is thrown right after the first 100 iterations for the >> first fold*: >> >> NullPointerException opennlp.tools.namefind.**TokenNameFinderModel.<init> >> (TokenNameFinderModel.java:90) >> >> *If i omit the "new NameSampleDataStream()" (as shown in the docs) i get >> a different error saying:* >> >> ClassCastException java.lang.String cannot be cast to >> opennlp.tools.namefind.**NameSample opennlp.tools.namefind.** >> TokenNameFinderCrossValidator$**NameToDocumentSampleStream.**read (** >> TokenNameFinderCrossValidator.**java:67) >> >> What am i missing? >> >> Thanks in advance... >> >> Jim >> >> >> >> >> >
