Re: The wisdom of the object mentors (Was: Searching OO Associations with RDBMS Persistence Models)
From: Robert Martin <unclebob_at_objectmentor.com>
Date: Tue, 20 Jun 2006 13:13:05 -0400
Message-ID: <2006062013130599097-unclebob_at_objectmentorcom>
Date: Tue, 20 Jun 2006 13:13:05 -0400
Message-ID: <2006062013130599097-unclebob_at_objectmentorcom>
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 |Received on Tue Jun 20 2006 - 19:13:05 CEST