Associations and extended objects

Question

Hi,
I'm just beginning to look at bc4j so bear with me if I ask a stupid question :-)
The thing is that I'm experimenting with simple inheritance and I cant seem to get the associations to work like I would expect. I have 3 classes (business components). Customer, Account (which in my model is an abstract superclass) and SavingsAccount. And there is an association between Account and Customer in my model implying of cause that there is an assosiation between all subclasses of Account (SavingsAccount) and Customer.
Account and SavingsAccount are in seperate tables - mabye thats where my problems lie ?
But no such associations are created automatically by the 'create database objects' command.
Is this also the experience of others here ? What it means is that my model gets 'abused' when I create the associations and I'm not too happy about that.

Answer 1

Well, then I'm stumped as to why that won't work for me. If I have the following code:
import java.util.*;
public class Test1
    private ArrayList<E extends Integer> aList;
    public Test1()
        aList = new ArrayList<Integer>();
    public void run()
        for (byte i = 0; i < 10; i++)
            Integer o = new Integer(i);
            aList.add(o);
    public ArrayList<E extends Integer> getResults()
        return aList;
}I get "> expected".
Your last piece of code shows what I will probably end up doing, as this just can't seem to work, i.e. getting each Object1 and casting it to an Object2.
What I need, is to initially build an ArrayList containing Object1s. Then my Object2 class is an extension of Object1, and therefore I else want to have that ArrayList returned, but the info I need now are Object2s. So basically build an ArrayList of Object1s, needed in that particular class, make a method that returns it, invoke that method in another class, but have that ArrayList contain Object2s instead.
While I could iterate through the elements, I will also need to return the ArrayList with Object2 elements in it from the other class, so I prefer being able to do it in one swoop, using generics, if at all possible. Which it seems not to be.
Edited by: ThemePark on May 21, 2008 2:14 PM