/**
* To invoke the callback.
* [Note: Do not call this function from your application, it is used internally]
*
* @param $instance
* @param string $function
* @param HttpRequest/HttpResponse $param
* @throws InvalidOperation
*/
protected function InvokeCallBack($instance, $function, $param)
{
try {
if ($function) {
if ($instance) {
$class = new ReflectionClass(get_class($instance));
$method = $class->getMethod($function);
$method->Invoke($instance, $param);
} else {
$func = new ReflectionFunction($function);
$func->Invoke($param);
}
}
} catch (ReflectionException $exception) {
throw new InvalidOperation($exception->getMessage());
}
}
