I’m not sure how my mind works or why it thinks of these things. Maybe
I’m thinking of work too much. Thing is, I’ve had to explain this
“Navigation Service” class that we’re working on more times than I care
to count. (The Navigation Service is a class that helps in providing
navigational menus, breadcrumb trails, and other navigational artifacts
by maintaining an object hierarchy representing the site… basically.)
So I was on the way home last night and decided it might be described
best by Adam Sandler’s “Cajun
Presenter: The Navigation Service provides an object-oriented view
of the site map, related links, and quick links for a site. You can
use it to display, for example, a tree-view of the available pages for
Cajun Man: Hierarchical presenta-shawn.
Presenter: The Navigation Service is accessed through a property
available in the base page class. You could cache an instance of the
Navigation Service class and then access that cached instance through
the property on the page.
Cajun Man: Single-tawn.
Presenter: When getting a reference to the Navigation Service,
you don’t actually create the instance directly. Instead, call the
static “GetNavigationService” method and it will get an instance for
Cajun Man: Factory crea-shawn.
Presenter: What the Navigation Service does is it takes the
navigation.config file and reads it into an object model based on the
Cajun Man: XML deserializa-shawn.
Presenter: Then it does some manual processing to make the
objects just a little bit “smarter” than that, filling in calculated
values and such.
Cajun Man: Initializa-shawn.
Presenter: If you have a bunch of, for example, “Item” elements
in the “Site,” those will come out in the Navigation Service as a…
Cajun Man: Strongly-typed collec-shawn.
Presenter: Right. And if there are no elements in a collection,
you end up with…
Cajun Man: Empty collec-shawn.
Presenter: Well, no… actually you get a null value, though the
Navigation Service could be updated to make any null collections be
empty collections. That way you could just iterate over the collection
rather than having to check for null all the time.
Cajun Man: No NullReferenceExcep-shawn.
…that’s as far as I got before I made it home and my train of thought
was lost, but I think you see how it goes. While I’m nowhere near as
funny as Adam Sandler, maybe I can use this to explain (in a memorable
fashion) how this thing works. Heh.