Re: Design Question

[Norman Palardy <npalardy@great-white-software.com>]

On 30-Oct-08, at 8:53 AM, Sam Rowlands wrote:

> Is there a way to create a class.parent without having a property on  
> the class?
> For instance say I have a class called Engine, then I have an array  
> of Valve classes. The array is a property of Engine.
> Engine.Valves()
>
> However now I want the valve to communicate with the Engine, to  
> notify the engine when it fails, do I create a property on the valve  
> class called parent and set that to be my engine, or is there some  
> fancy trick I can use to probe the valve and figure it out?

sounds like a valve should have a way to notify anything that is  
monitoring it
and an engine could notify things that are observing it as well

check out the Observer pattern



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