public function init(ServletConfigInterface $servletConfig)
    {

        // pre-initialize the X-POWERED-BY header
        $this->poweredBy = get_class($this);

        // pre-initialize the possible DHTML template paths
        $this->webappPath = $servletConfig->getWebappPath();
        $this->appBase = $servletConfig->getServletContext()->getAppBase();
        $this->baseDirectory = $servletConfig->getServletContext()->getBaseDirectory();
    }