Support Forums: Message List - A Modular Approach to Data Validation in Web Applications http://www.theserverside.com Most recent forum messages en Jive Forums Silver 5.5.30 (www.jivesoftware.com) Sun, 19 May 2013 23:32:59 -0400 Re: Validation in setters http://www.theserverside.com/discussions/thread.tss?thread_id=39627 Everything I've read is that putting validation in your domain model is fine, but only done correctly. In most cases, within series of interactions, you can't assert that your objects are valid in all context-- but are validatable. So the...]]> Tue, 23 May 2006 16:37:11 -0400 Tue, 23 May 2006 16:37:11 -0400 Tue, 23 May 2006 16:37:11 -0400 May 23, 2006 Tim Fennell 0 Exactly http://www.theserverside.com/discussions/thread.tss?thread_id=39627 Tue, 23 May 2006 10:11:37 -0400 Tue, 23 May 2006 10:11:37 -0400 Tue, 23 May 2006 10:11:37 -0400 May 23, 2006 stephendv 0 Validation in setters http://www.theserverside.com/discussions/thread.tss?thread_id=39627 Using Spring and AOP, i was able to inject business validations on service method calls. For e.g. if an action calls a service method, say saveOrder(...) and passing an object graph, the validator is configured to be called anytime a method...]]> Wed, 05 Apr 2006 14:38:33 -0400 Wed, 05 Apr 2006 14:38:33 -0400 Wed, 05 Apr 2006 14:38:33 -0400 Apr 5, 2006 FRED SAVARD 0 Validation in domain objects may not be enough http://www.theserverside.com/discussions/thread.tss?thread_id=39627 Fri, 31 Mar 2006 02:40:19 -0500 Fri, 31 Mar 2006 02:40:19 -0500 Fri, 31 Mar 2006 02:40:19 -0500 Mar 31, 2006 NinjaNils3 1 Validation in setters http://www.theserverside.com/discussions/thread.tss?thread_id=39627
Maybe I misread Derek's post, but it sounded like he was leaning on the ol' EJB Stateless patterns with DAOs / plain Data beans, and stateless functions.
Close, but replace EJB with Spring. I was thinking in terms of...]]> Wed, 29 Mar 2006 15:17:47 -0500 Wed, 29 Mar 2006 15:17:47 -0500 Wed, 29 Mar 2006 15:17:47 -0500 Mar 29, 2006 Sandy FromNY 1 Domain Rules vs. Application Rules http://www.theserverside.com/discussions/thread.tss?thread_id=39627 I don't mean to constantly plug our stuff on TSS (though it might look like that). This just seems, once more, pertinent to mention.
It's not your fault that people (including myself) are constantly wondering about ways of...]]> Wed, 29 Mar 2006 11:25:01 -0500 Wed, 29 Mar 2006 11:25:01 -0500 Wed, 29 Mar 2006 11:25:01 -0500 Mar 29, 2006 Freddy Daoud 0 Domain Rules vs. Application Rules http://www.theserverside.com/discussions/thread.tss?thread_id=39627 I'm always open to a better solution that is 1) still OO (or close), 2) maintains the separation at some point for ease of maintenance and administration, 3) allows me to chose which combinations of rules to apply in any...]]> Tue, 28 Mar 2006 17:29:59 -0500 Tue, 28 Mar 2006 17:29:59 -0500 Tue, 28 Mar 2006 17:29:59 -0500 Mar 28, 2006 gbevin 1 Validation in setters http://www.theserverside.com/discussions/thread.tss?thread_id=39627 Maybe I misread Derek's post, but it sounded like he was leaning on the ol' EJB Stateless patterns with DAOs / plain Data beans, and stateless functions.Close, but replace EJB with Spring. I was thinking in terms of an...]]> Tue, 28 Mar 2006 13:56:47 -0500 Tue, 28 Mar 2006 13:56:47 -0500 Tue, 28 Mar 2006 13:56:47 -0500 Mar 28, 2006 Derek Ward 2 Domain Rules vs. Application Rules http://www.theserverside.com/discussions/thread.tss?thread_id=39627
Domain rules are intended to fill in the gaps between real world data types and the limited data types...]]> Tue, 28 Mar 2006 13:29:47 -0500 Tue, 28 Mar 2006 13:29:47 -0500 Tue, 28 Mar 2006 13:29:47 -0500 Mar 28, 2006 William Childers 2 A Modular Approach to Data Validation in Web Applications http://www.theserverside.com/discussions/thread.tss?thread_id=39627 Tue, 28 Mar 2006 12:47:03 -0500 Tue, 28 Mar 2006 12:47:03 -0500 Tue, 28 Mar 2006 12:47:03 -0500 Mar 28, 2006 Michael Jouravlev 0 Validation in setters http://www.theserverside.com/discussions/thread.tss?thread_id=39627
- Consider date input in text field that should be put in java.util.Date property of the JavaBean. You have to validate and convert string to a Date before invoking setter.

- Validation...]]> Tue, 28 Mar 2006 11:22:30 -0500 Tue, 28 Mar 2006 11:22:30 -0500 Tue, 28 Mar 2006 11:22:30 -0500 Mar 28, 2006 Mileta Cekovic 0 Validation in setters http://www.theserverside.com/discussions/thread.tss?thread_id=39627 Fowler does not go that far.
Nor do I ;-)

I'm not advocating "loading up you're object with every application specific rules". All I'm saying is Domain Models should be more than just Data...]]> Tue, 28 Mar 2006 11:13:08 -0500 Tue, 28 Mar 2006 11:13:08 -0500 Tue, 28 Mar 2006 11:13:08 -0500 Mar 28, 2006 Mike Stanley 3 Domain Rules vs. Application Rules http://www.theserverside.com/discussions/thread.tss?thread_id=39627
I like the way you make a distinction between a rule intrinsic to a zip code and a rule that is only relevant to the application at hand. A...]]> Tue, 28 Mar 2006 10:53:17 -0500 Tue, 28 Mar 2006 10:53:17 -0500 Tue, 28 Mar 2006 10:53:17 -0500 Mar 28, 2006 Lee Meador 3 Validation in setters http://www.theserverside.com/discussions/thread.tss?thread_id=39627
What Fowler says and what is good practice is to have domain objects...]]> Tue, 28 Mar 2006 10:29:15 -0500 Tue, 28 Mar 2006 10:29:15 -0500 Tue, 28 Mar 2006 10:29:15 -0500 Mar 28, 2006 William Childers 8 Validation in setters http://www.theserverside.com/discussions/thread.tss?thread_id=39627 I've always thought that this crosses the boundary between model and business rules/services.
This statement highlights a common OO anti-pattern, the Anemic Domain Model (often times seen in J2EE apps, which encourages this...]]> Tue, 28 Mar 2006 10:08:34 -0500 Tue, 28 Mar 2006 10:08:34 -0500 Tue, 28 Mar 2006 10:08:34 -0500 Mar 28, 2006 Mike Stanley 9