On Tuesday, Feb 18, 2003, at 03:38 US/Eastern, <[EMAIL PROTECTED]> wrote:
Hello,
I want to implement a qualified M:N mapping.
As explained in tutorial 3, I have created an association class.
My problem is how to retrieve (or store) info with this association class between the two classes?
Is it possible to have a "packages" attribute in the Workstation class and simply call the method "getPackages" to retrieve all the packages in a workstation?
How can I do that?
Here is the class-diagram:
class Package
-------------
int packageID; (PK)
Sring packageName;
String packageType;
Collection packageWorkstations
classs Workstation
------------------
int workstationID; (PK)
String workstationName;
String workstationType;
Collection packageWorkstations;
class Package_Workstation
-------------------------
int packageID; (PK)
int workstationID; (PK)
int rule_order;
Package package;
Workstation workstation;
There is a M:N relationship between Package and Workstation. The Package_Workstation class is the association class. The relationship is qualified with the field "rule_order".
Thanks for your help
Sylvain
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R -- Robert S. Sfeir Senior Java Engineer National Institutes of Health Center for Information Technology Department of Enterprise Custom Applications [EMAIL PROTECTED]
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