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https://issues.apache.org/jira/browse/OPENNLP-226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13085926#comment-13085926
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William Colen commented on OPENNLP-226:
---------------------------------------

Yes, thank you! I couldn't see that it was that simple. It should be something 
like this:

  public void evaluateSample(NameSample reference) {

    String[] sentence = reference.getSentence();
    Span predictedNames[] = nameFinder.find(sentence);
    Span references[] = reference.getNames();
    fmeasure.updateScores(references, predictedNames);

    if (this.sampleListener != null && !Arrays.equals(references, 
predictedNames)) {
      NameSample predicted = new NameSample(sentence, predictedNames,
          reference.isClearAdaptiveDataSet());
      this.sampleListener.missclassified(reference, predicted);
    }
  }

> Evaluators should allow tools to register a misclassified report interface
> --------------------------------------------------------------------------
>
>                 Key: OPENNLP-226
>                 URL: https://issues.apache.org/jira/browse/OPENNLP-226
>             Project: OpenNLP
>          Issue Type: New Feature
>          Components: Chunker, Command Line Interface, Name Finder, POS 
> Tagger, Sentence Detector, Tokenizer
>    Affects Versions: tools-1.5.2-incubating
>            Reporter: William Colen
>            Assignee: William Colen
>            Priority: Minor
>             Fix For: tools-1.5.2-incubating
>
>
> OPENNLP-220 introduced the -misclassified argument that enables evaluators to 
> print misclassified items while using the command line evaluators. We should 
> expand it to allow any other tool that uses evaluators to register an 
> interface to get that information.

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