public void run()

in opennlp-tools/src/main/java/opennlp/tools/cmdline/langdetect/LanguageDetectorCrossValidatorTool.java [62:127]
54 lines of code
9 McCabe index (conditional complexity)

  public void run(String format, String[] args) {
    super.run(format, args);

    mlParams = CmdLineUtil.loadTrainingParameters(params.getParams(), false);
    if (mlParams == null) {
      mlParams = ModelUtil.createDefaultTrainingParameters();
    }

    List<EvaluationMonitor<LanguageSample>> listeners = new LinkedList<>();
    if (params.getMisclassified()) {
      listeners.add(new LanguageDetectorEvaluationErrorListener());
    }

    LanguageDetectorFineGrainedReportListener reportListener = null;
    File reportFile = params.getReportOutputFile();
    OutputStream reportOutputStream = null;
    if (reportFile != null) {
      CmdLineUtil.checkOutputFile("Report Output File", reportFile);
      try {
        reportOutputStream = new FileOutputStream(reportFile);
        reportListener = new LanguageDetectorFineGrainedReportListener(reportOutputStream);
        listeners.add(reportListener);
      } catch (FileNotFoundException e) {
        throw createTerminationIOException(e);
      }
    }

    LanguageDetectorEvaluationMonitor[] listenersArr = listeners
        .toArray(new LanguageDetectorEvaluationMonitor[0]);

    LanguageDetectorCrossValidator validator;
    try {
      LanguageDetectorFactory factory = LanguageDetectorFactory.create(params.getFactory());
      validator = new LanguageDetectorCrossValidator(mlParams,
          factory, listenersArr);

      validator.evaluate(sampleStream, params.getFolds());
    } catch (IOException e) {
      throw new TerminateToolException(-1,
          "IO error while reading training data or indexing data: " + e.getMessage(), e);
    } finally {
      try {
        sampleStream.close();
      } catch (IOException e) {
        // sorry that this can fail
      }
    }

    logger.info("done");

    if (reportListener != null) {
      logger.info("Writing fine-grained report to {}",
          params.getReportOutputFile().getAbsolutePath());
      reportListener.writeReport();

      try {
        reportOutputStream.flush();
        reportOutputStream.close();
      } catch (IOException e) {
        // nothing to do
      }
    }

    logger.info("Accuracy: {} Number of documents: {}",
            validator.getDocumentAccuracy(), validator.getDocumentCount());
  }