public function dataValue()
    {
        $result = null;
        if (is_array($this->value)) {
            $this->value = $this->arrayFilterEmptyRecursive($this->value);
            $result = (!empty($this->value)) ? Convert::array2json($this->value) : $result;
        } else {
            $result = parent::dataValue();
        }

        return $result;
    }