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• Strategies and discriminators in NHibernate

  I recently posted about enumeration classes , and how I like to use them as a sort of "Enumerations with behavior". Not every enumeration should be replaced with a class, but that pattern helps quite a bit when I find a lot of switch statements... Posted Aug 26 2008, 11:44 PM by bogardj with | with 9 comment(s) Filed under: Patterns, NHibernate

• Separation of Concerns by example: Part 3

  We made quite a bit of progress separating out the concerns in Part 2, but there are still some issues with our current design. Other parts in this series include: Separation of Concerns - how not to do it Separation of Concerns by example: Part 1 - Refactoring... Posted Jun 26 2008, 11:14 PM by bogardj with | with 12 comment(s) Filed under: Patterns, Refactoring, LINQ to SQL

• Unit testing MonoRail controllers - Redirects

  When developing with MonoRail , one of the common operations is to redirect to other controllers and actions. Originally, I looked at the BaseControllerTester to help test, but it required a little too much knowledge of the inner workings of MonoRail... Posted Feb 18 2008, 09:40 PM by bogardj with | with 7 comment(s) Filed under: Patterns, Testing, TDD, MonoRail

• Intention-concealing interfaces: blob parameters

  When someone is using your code, you want your code to be as explicit and easy to understand as possible. This is achieved through Intention-Revealing Interfaces. Evans describes the problems of opaque and misleading interfaces in Domain-Driven Design... Posted Nov 29 2007, 10:27 AM by bogardj with | with 1 comment(s) Filed under: Domain-Driven Design, Patterns, C#

• Specifications versus validators

  Joe posed a great question on my recent entity validation post : I question the term Validator in relation to DDD. Since the operation of the Validator seems to be a simple predicate based on business rule shouldn't the term Specification [Evans Pg227... Posted Oct 25 2007, 09:19 AM by bogardj with | with 5 comment(s) Filed under: Domain-Driven Design, Patterns

• Entity validation with visitors and extension methods

  On the Yahoo ALT.NET group , an interesting conversation sprung up around the topic of validation. Entity validation can be a tricky beast, as validation rules typically depend on the context of the operation (persistence, business rules, etc.). In complex... Posted Oct 24 2007, 10:52 AM by bogardj with | with 10 comment(s) Filed under: Patterns, C#

• Template Delegate Pattern

  This post was originally published here . I've had to use this pattern a few times, most recently in Behave# . It's similar to the Template Method pattern , but doesn't resort to using subclassing for using a template method. Instead, a delegate... Posted Aug 29 2007, 08:51 PM by bogardj with | with no comments Filed under: Patterns, C#, Refactoring