public function getConfigParam($name, $default = null)
    {
        $this->init();

        if (isset($this->_aConfigParams[$name])) {
            $value = $this->_aConfigParams[$name];
        } elseif (isset($this->$name)) {
            $value = $this->$name;
        } else {
            $value = $default;
        }

        return $value;
    }