public ColorScheme getColorScheme(
      long companyId, String themeId, String colorSchemeId, boolean wapTheme)
      throws SystemException {

    colorSchemeId = GetterUtil.getString(colorSchemeId);

    Theme theme = getTheme(companyId, themeId, wapTheme);

    Map<String, ColorScheme> colorSchemesMap = theme.getColorSchemesMap();

    ColorScheme colorScheme = colorSchemesMap.get(colorSchemeId);

    if (colorScheme == null) {
      List<ColorScheme> colorSchemes = theme.getColorSchemes();

      if (colorSchemes.size() > 0) {
        for (int i = (colorSchemes.size() - 1); i >= 0; i--) {
          colorScheme = colorSchemes.get(i);

          if (colorScheme.isDefaultCs()) {
            break;
          }
        }
      }
    }

    if (colorScheme == null) {
      if (wapTheme) {
        colorSchemeId = ColorSchemeImpl.getDefaultWapColorSchemeId();
      } else {
        colorSchemeId = ColorSchemeImpl.getDefaultRegularColorSchemeId();
      }
    }

    if (colorScheme == null) {
      colorScheme = ColorSchemeImpl.getNullColorScheme();
    }

    return colorScheme;
  }
  @Override
  public void run(HttpServletRequest request, HttpServletResponse response) throws ActionException {

    try {

      // Do not randomize look and feel unless the user is logged in

      ThemeDisplay themeDisplay = (ThemeDisplay) request.getAttribute(WebKeys.THEME_DISPLAY);

      if (!themeDisplay.isSignedIn()) {
        return;
      }

      // Do not randomize look and feel unless the user is accessing the
      // portal

      String requestURI = GetterUtil.getString(request.getRequestURI());

      if (!requestURI.endsWith("/portal/layout")) {
        return;
      }

      // Do not randomize look and feel unless the user is accessing a
      // personal layout

      Layout layout = themeDisplay.getLayout();

      if (layout == null) {
        return;
      }

      boolean wapTheme = BrowserSnifferUtil.isWap(request);

      List<Theme> themes =
          ThemeLocalServiceUtil.getPageThemes(
              themeDisplay.getCompanyId(),
              themeDisplay.getScopeGroupId(),
              themeDisplay.getUserId(),
              wapTheme);

      if (!themes.isEmpty()) {
        Theme theme = themes.get(RandomUtil.nextInt(themes.size()));

        List<ColorScheme> colorSchemes = theme.getColorSchemes();

        ColorScheme colorScheme = colorSchemes.get(RandomUtil.nextInt(colorSchemes.size()));

        LayoutServiceUtil.updateLookAndFeel(
            layout.getGroupId(),
            layout.isPrivateLayout(),
            layout.getPlid(),
            theme.getThemeId(),
            colorScheme.getColorSchemeId(),
            layout.getCss(),
            wapTheme);

        themeDisplay.setLookAndFeel(theme, colorScheme);

        request.setAttribute(WebKeys.THEME, theme);
        request.setAttribute(WebKeys.COLOR_SCHEME, colorScheme);
      }
    } catch (Exception e) {
      _log.error(e, e);

      throw new ActionException(e);
    }
  }