public void run()

in opennlp-tools/src/main/java/opennlp/tools/cmdline/postag/POSTaggerTrainerTool.java [56:142]
75 lines of code
14 McCabe index (conditional complexity)

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

    mlParams = CmdLineUtil.loadTrainingParameters(params.getParams(), true);
    if (mlParams != null && !TrainerFactory.isValid(mlParams)) {
      throw new TerminateToolException(1, "Training parameters file '" + params.getParams() +
          "' is invalid!");
    }

    if (mlParams == null) {
      mlParams = ModelUtil.createDefaultTrainingParameters();
    }

    File modelOutFile = params.getModel();
    CmdLineUtil.checkOutputFile("pos tagger model", modelOutFile);

    Map<String, Object> resources;

    try {
      resources = TokenNameFinderTrainerTool.loadResources(
          params.getResources(), params.getFeaturegen());
    }
    catch (IOException e) {
      throw new TerminateToolException(-1,"IO error while loading resources", e);
    }

    byte[] featureGeneratorBytes =
        TokenNameFinderTrainerTool.openFeatureGeneratorBytes(params.getFeaturegen());

    POSTaggerFactory postaggerFactory;
    try {
      postaggerFactory = POSTaggerFactory.create(params.getFactory(), featureGeneratorBytes,
          resources, null);
    } catch (InvalidFormatException e) {
      throw new TerminateToolException(-1, e.getMessage(), e);
    }

    if (params.getDict() != null) {
      try {
        postaggerFactory.setTagDictionary(postaggerFactory
            .createTagDictionary(params.getDict()));
      } catch (IOException e) {
        throw new TerminateToolException(-1,
            "IO error while loading POS Dictionary", e);
      }
    }

    if (params.getTagDictCutoff() != null) {
      try {
        TagDictionary dict = postaggerFactory.getTagDictionary();
        if (dict == null) {
          dict = postaggerFactory.createEmptyTagDictionary();
          postaggerFactory.setTagDictionary(dict);
        }
        if (dict instanceof MutableTagDictionary) {
          POSTaggerME.populatePOSDictionary(sampleStream, (MutableTagDictionary)dict,
              params.getTagDictCutoff());
        } else {
          throw new IllegalArgumentException(
              "Can't extend a POSDictionary that does not implement MutableTagDictionary.");
        }
        sampleStream.reset();
      } catch (IOException e) {
        throw new TerminateToolException(-1,
            "IO error while creating/extending POS Dictionary: "
                + e.getMessage(), e);
      }
    }

    POSModel model;
    try {
      model = opennlp.tools.postag.POSTaggerME.train(params.getLang(),
          sampleStream, mlParams, postaggerFactory);
    }
    catch (IOException e) {
      throw createTerminationIOException(e);
    }
    finally {
      try {
        sampleStream.close();
      } catch (IOException e) {
        // sorry that this can fail
      }
    }

    CmdLineUtil.writeModel("pos tagger", modelOutFile, model);
  }