Comments on: Programming with Exceptions: some thoughts.
http://kristofmattei.be/2009/11/10/programming-with-exceptions-some-thoughts/
A blog on my experiences in programming, school, and life!Sat, 24 Jul 2010 01:26:58 +0000hourly1http://wordpress.org/?v=3.0By: whoami
http://kristofmattei.be/2009/11/10/programming-with-exceptions-some-thoughts/comment-page-1/#comment-2199
whoamiFri, 08 Jan 2010 20:35:48 +0000http://kristofmattei.be/2009/11/10/programming-with-exceptions-some-thoughts/#comment-2199Hmm...
When you <strong>expect</strong> that the given Id exists, and you did not find a Product for that Id: throw an exception.
When it is very possible that a Product cannot be found given the (user) input, return null, and handle it elsewhere.
(For instance when they (user) search on a business-key (like an invoice number for instance), it is possible that the user makes a typing error, so, I would not throw an exception in such a case, since it is not exceptional that a user makes an error).
And, I think the naming convention of HawVer makes it quite self-explaining as well.Hmm…
When you expect that the given Id exists, and you did not find a Product for that Id: throw an exception.
When it is very possible that a Product cannot be found given the (user) input, return null, and handle it elsewhere.
(For instance when they (user) search on a business-key (like an invoice number for instance), it is possible that the user makes a typing error, so, I would not throw an exception in such a case, since it is not exceptional that a user makes an error).
And, I think the naming convention of HawVer makes it quite self-explaining as well.
]]>By: HawVer
http://kristofmattei.be/2009/11/10/programming-with-exceptions-some-thoughts/comment-page-1/#comment-2084
HawVerMon, 30 Nov 2009 14:40:06 +0000http://kristofmattei.be/2009/11/10/programming-with-exceptions-some-thoughts/#comment-2084I'd say FindProductById returns null and GetProduct throws an InvalidArgumentException. That's how most of the collection classes in .Net works. Then how to use GetProduct without breaking our execution:
if (ContainsProduct(id))
Product p = GetProduct(id);I’d say FindProductById returns null and GetProduct throws an InvalidArgumentException. That’s how most of the collection classes in .Net works. Then how to use GetProduct without breaking our execution:
if (ContainsProduct(id))
Product p = GetProduct(id);