[Cs3] CS3 - Lab 8 Question

[Mikhail Nesterenko]

> Product* Factory<Product>::make(char figType, int size, char fillType, char fillChar){
>     Product *retProduct;
>     Fill *ptrToFill;
> 
>     // determine the fill type
>     if(fillType == 's'|| fillType == 'S')
>         ptrToFill = new Solid(fillChar);
>     else
>         ptrToFill = new Hollow(fillChar);
> 
>     // determine the figure type
>     if(figType == 't' || fillType == 'T')
>         retProduct = new Triangle(size, ptrToFill);
>     else
>         retProduct = new Square(size, ptrToFill);
> 
>     return retProduct;
> }

This solution defeats the purpose of the factory pattern: the
factory recognizes the type of product it manufactures. The problem
with this is that it requires a modification of this function in case
a new figure type is added.

See if you can recode this such that the abstract factory method is
unaware of the type of concrete product it produces.

 Hint: "new" may be parametrized by the template's type parameter.

Thanks,
--
Mikhail