Can I write this? Or how to do it?

Can I write this? Or how to do it?

I have a database reader which uses generics and declared like this: IDatabaseReader

Now, based on a parameter I can call the reader for different .

var
readerCustomer: IDatabaseReader;
readerAddress: IDatabaseReader;

begin
readerCustomer:=TDatabaseReader.Create;
readerAddress:=TDatabaseReader.Create;
end;


Instead of declaring the readers I tried to do something along these lines:

var
reader: IDatabaseReader;
readObject: TObject;
begin
if param=Customers then
readObject:=@TCustomers; <---????
reader:=TDatabaseReader<@readObject>.Create; <---????
end;

Would something like this be possible? Or, perhaps, with RTTI?

Thanks