Re: The wisdom of the object mentors (Was: Searching OO Associations with RDBMS Persistence Models)

On 2006-06-13 08:30:53 -0400, "x" <x_at_not-exists.org> said:

> You can isolate SQL and its functionality in a module, but the interface
> will still be dependent of the functionality of SQL if you want to benefit
> from it, I guess.

True, but the interface will only depend on the abstract nature of the SQL functionality. Thus:

Employee* getEmployee(int empId);

I can certainly implement this with SQL, but I could implement it any of a number of different ways too. The caller does not need to know that I am using SQL.

-- 
Robert C. Martin (Uncle Bob)  | email: unclebob_at_objectmentor.com
Object Mentor Inc.            | blog:  www.butunclebob.com
The Agile Transition Experts  | web:   www.objectmentor.com
800-338-6716                  |