Comments on: Udi’s first principle of design http://www.udidahan.com/2006/01/29/udis-first-principle-of-design/ Enterprise Development Expert & SOA Specialist Sat, 11 Feb 2012 15:16:10 -0600 http://wordpress.org/?v=2.8.4 hourly 1 By: Ralf http://www.udidahan.com/2006/01/29/udis-first-principle-of-design/comment-page-1/#comment-274 Ralf Mon, 30 Jan 2006 13:09:49 +0000 http://wp_630.weblogs.us/archives/250#comment-274 Do you really mean "any classes"? I think that´s not necessary and not feasible. Interface types are like standards: There are standards (e.g. HTTP, RSS) where decoupling is needed, e.g. between client and server software on the web. But there are no standards constraining how you structure your client/server internally. Likewise there don´t need to be interfaces between each and every class. Rather it´s necessary to identify lumps of code which can be seen as black boxes between which interfaces/contracts are necessary - but within which you can do pretty much all you like ;-) Nevertheless I´m eager to see your next rules. It´s a worthwhile undertaking trying to structure your knowledge into rules to make it more explicit, because thereby you make it easier to transfer. And you make it easier to discuss ;-) Do you really mean “any classes”? I think that´s not necessary and not feasible. Interface types are like standards: There are standards (e.g. HTTP, RSS) where decoupling is needed, e.g. between client and server software on the web. But there are no standards constraining how you structure your client/server internally.

Likewise there don´t need to be interfaces between each and every class. Rather it´s necessary to identify lumps of code which can be seen as black boxes between which interfaces/contracts are necessary – but within which you can do pretty much all you like ;-)

Nevertheless I´m eager to see your next rules. It´s a worthwhile undertaking trying to structure your knowledge into rules to make it more explicit, because thereby you make it easier to transfer. And you make it easier to discuss ;-)

]]>