@Override
  public VPackage parse() {

    logger.debug("Starting parsing package: " + xmlFile.getAbsolutePath());

    long startParsing = System.currentTimeMillis();

    try {
      Document document = getDocument();
      Element root = document.getDocumentElement();

      _package = new VPackage(xmlFile);

      Node name = root.getElementsByTagName(EL_NAME).item(0);
      _package.setName(name.getTextContent());
      Node descr = root.getElementsByTagName(EL_DESCRIPTION).item(0);
      _package.setDescription(descr.getTextContent());

      NodeList list = root.getElementsByTagName(EL_CLASS);

      boolean initPainters = false;
      for (int i = 0; i < list.getLength(); i++) {
        PackageClass pc = parseClass((Element) list.item(i));
        if (pc.getPainterName() != null) {
          initPainters = true;
        }
      }

      if (initPainters) {
        _package.initPainters();
      }

      logger.info(
          "Parsing the package '{}' finished in {}ms.\n",
          _package.getName(),
          (System.currentTimeMillis() - startParsing));
    } catch (Exception e) {
      collector.collectDiagnostic(e.getMessage(), true);
      if (RuntimeProperties.isLogDebugEnabled()) {
        e.printStackTrace();
      }
    }

    try {
      checkProblems("Error parsing package file " + xmlFile.getName());
    } catch (Exception e) {
      return null;
    }

    return _package;
  }
 protected String getWorkingDir() {
   return _package.getDir();
 }
  private PackageClass parseClass(Element classNode) {
    PackageClass newClass = new PackageClass();
    _package.getClasses().add(newClass);

    newClass.setComponentType(PackageClass.ComponentType.getType(classNode.getAttribute(ATR_TYPE)));
    newClass.setStatic(Boolean.parseBoolean(classNode.getAttribute(ATR_STATIC)));
    newClass.setName(getElementByName(classNode, EL_NAME).getTextContent());
    final String source = getElementStringByName(classNode, EL_FILE);
    if (source != null) {
      newClass.setSource(source);
    }
    newClass.setTarget(getElementStringByName(classNode, EL_EXTENDS));
    newClass.setDescription(getElementByName(classNode, EL_DESCRIPTION).getTextContent());
    newClass.setIcon(getElementByName(classNode, EL_ICON).getTextContent());

    // parse all variables declared in the corresponding specification
    if (newClass.getComponentType().hasSpec()) {
      final String newClassName = newClass.getName();
      try {
        switch (RuntimeProperties.getSpecParserKind()) {
          case REGEXP:
            {
              ClassList classList = new ClassList();
              SpecParser.parseSpecClass(newClassName, getWorkingDir(), classList);
              newClass.setSpecFields(classList.getType(newClassName).getFields());
              break;
            }
          case ANTLR:
            {
              if (specificationLoader == null) {
                specificationLoader =
                    new SpecificationLoader(new PackageSpecSourceProvider(_package), null);
              }
              final AnnotatedClass annotatedClass =
                  specificationLoader.getSpecification(newClassName);
              newClass.setSpecFields(annotatedClass.getFields());
              break;
            }
          default:
            throw new IllegalStateException("Undefined specification language parser");
        }
      } catch (SpecParseException e) {
        final String msg = "Unable to parse the specification of class " + newClassName;
        logger.error(msg, e);
        collector.collectDiagnostic(msg + "\nReason: " + e.getMessage() + "\nLine: " + e.getLine());
      }
    }

    // Graphics
    Element grNode = getElementByName(classNode, EL_GRAPHICS);
    newClass.addGraphics(
        getGraphicsParser().parse(grNode/*, newClass.getComponentType() == ComponentType.REL*/ ));

    Element painter;
    if ((painter = getElementByName(grNode, EL_PAINTER)) != null) {
      newClass.setPainterName(painter.getTextContent());
    }

    // Ports
    NodeList ports = classNode.getElementsByTagName(EL_PORT);
    for (int i = 0; i < ports.getLength(); i++) {
      parsePort(newClass, (Element) ports.item(i));
    }

    // Fields
    NodeList fields = classNode.getElementsByTagName(EL_FIELD);
    for (int i = 0; i < fields.getLength(); i++) {
      parseField(newClass, (Element) fields.item(i));
    }

    return newClass;
  }