protected function getTemplate($template)
    {
        $template = config("imagecache.templates.{$template}");

        switch (true) {
            // closure template found
            case is_callable($template):
                return $template;

            // filter template found
            case class_exists($template):
                return new $template;

            default:
                // template not found
                abort(404);
                break;
        }
    }