public void run()

in opennlp-tools/src/main/java/opennlp/tools/cmdline/langdetect/LanguageDetectorEvaluatorTool.java [71:145]
60 lines of code
7 McCabe index (conditional complexity)

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

    LanguageDetectorModel model = new LanguageDetectorModelLoader().load(params.getModel());

    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 new TerminateToolException(-1,
            "IO error while creating LanguageDetector fine-grained report file: "
                + e.getMessage());
      }
    }

    LanguageDetectorEvaluator evaluator = new LanguageDetectorEvaluator(
        new LanguageDetectorME(model),
        listeners.toArray(new LanguageDetectorEvaluationMonitor[0]));

    final PerformanceMonitor monitor = new PerformanceMonitor("doc");

    try (ObjectStream<LanguageSample> measuredSampleStream = new ObjectStream<>() {

      @Override
      public LanguageSample read() throws IOException {
        monitor.incrementCounter();
        return sampleStream.read();
      }

      @Override
      public void reset() throws IOException {
        sampleStream.reset();
      }

      @Override
      public void close() throws IOException {
        sampleStream.close();
      }
    }) {
      monitor.startAndPrintThroughput();
      evaluator.evaluate(measuredSampleStream);
    } catch (IOException e) {
      throw new TerminateToolException(-1, "IO error while reading test data: "
              + e.getMessage(), e);
    }
    // sorry that this can fail

    monitor.stopAndPrintFinalResult();

    logger.info(evaluator.toString());

    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
      }
    }
  }