multiple classes question

[Marcelo Barbudas]

Hi.

I need to create a class "Getter" that exposes a method "retrieve"
implemented differently depending on what backend is chosen.

The public API could be something like:
getter = Getter.newbackend => "DB")
getter.retrieve (where retrieve is implemented in a separate module or
class called DB)

What's the best way to design such a class/module structure?

-M.

 

[Steve Klabnik]

[Note: parts of this message were removed to make it a legal post.]

This is known as the strategy pattern:
http://en.wikipedia.org/wiki/Strategy_pattern

Googling around for 'ruby strategy pattern' turns up some interesting
things, like this: http://tangleofwire.net/the-strategy-pattern-in-ruby