public function addValidator($columnName, $name, $classname, $value, $message)
    {
        if (false !== ($pos = strpos($columnName, '.'))) {
            $columnName = substr($columnName, $pos + 1);
        }

        $col = $this->getColumn($columnName);
        if ($col !== null) {
            $validator = new ValidatorMap($col);
            $validator->setName($name);
            $validator->setClass($classname);
            $validator->setValue($value);
            $validator->setMessage($message);
            $col->addValidator($validator);
        }
    }