Object Design Question

[YuenLian Wu]

Hi All,

I have an Object Model Design question and would like to brainstorm with you guys.

Users can View/Add/Delete a list of Security Instrument(with unique key) from GUI. I would like to construct an Object Model so that it will perform a diff action between Retrieved List and Modified List of Instrument Objects once user hit the save button from GUI, and the Model should return how many records that I should delete/insert or Do Nothing. For example, the list might contain Google, CITI and Microsoft originally, and then the user modified the list so that CITI was removed and GE was added.
What's the best way to implement such Data Model ? Should I override the Comparable Object and Implement my diff logc in there ?

Please let me know you thoughts, thanks.


Cheers,


Transistor

[Jeanne Boyarsky]

YuenLian,
Is that comparison logic the logic you would always use? If so, your approach sounds good. (I'd implement equals and hashCode for consistency.) If not, you would be better to use a Comparator that you pass into the list/map for one time use.

I notice you are in the performance forum and not the design forum. I'll move this for you.