[fpc-pascal] Heterogenous list of objects

[g.marcou at chimie.u-strasbg.fr]

Hi all,

thanks for your kind and fast answer. Effectively, TObjectList is what  
I need. Thanks to Damien, I understand a bit better how it works. But  
in my case I believe  that I need to use some kind of TList of  
TObjectList. So is it possible to build a class that will have  
TObjecList member so that I will be able to use TList of this class?

For instance:

-----
TToDo=class(TList)
private
   fProducts: TObjectList;//Cheeses, Soaps, etc.
   fShops: TObjectList;//Shops, Markets, Internet,...
public
   property Products: TObjectList read fProducts write fProducts;
   property fShops: TObjectList read fShops write fShops;
   creator Create;
   destructor Destroy; override;
   procedure Clear; override;
   ...
end;
-----

I may have to say more about my project so you'll have better insight  
in my design problem. I have an XML to drive my application to do a  
set of diverse actions.

Root
|
|-action1-|-action11
|         |-action12
|
|-action2-|-action21
           |-action22

action1 and action2 shall be a TObjectList because action11,  
action12,... can be instances of different classes. Then I want  
action1 and action2 to be stored in some kind of container (I believe  
a TList).

So I call to your opinion to see if it is an acceptable design and if  
I am not mixing incompatible concepts (TList and TObjectList).

Thanks for your insight,
Gilles Marcou