Re: Subject and Observer Interfaces
| From: | Sebastian Bergmann | Date: | Tue, 13 Sep 2005 05:35:38 +0000 |
| Subject: | Re: Subject and Observer Interfaces | ||
| References: | 1 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-18810@lists.php.net to get a copy of this message | ||
Jeff Moore schrieb:
> The problem with the Observer interface is that any class implementing
> it is only capable of receiving one kind of notification (update) and
> there is no capability to send any additional information.
>
> The problem with the Subject interface is that it can also only support
> one kind of observer.
You can extend the interfaces
interface MySubject extends Subject {
}
interface MyObserver extends Observer {
}
and adapt them to your needs while retaining the possibility to use them
with other code that only knows about the original Subject and Observer
interfaces.
--
Sebastian Bergmann http://www.sebastian-bergmann.de/
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