From: Joel VanderWerf <vjoel@...>
Date: 2005-04-20T04:14:41+09:00
Subject: Re: Needle and Parameterized Services

Rob Lally wrote:
> Hi,
> 
> I've been using Needle to try to create an iBatis like framework in 
> Ruby. I want register parameterized blocks but when I do this they have 
> to take the container and service point as the first two parameters. At 
> least I think they need to ... I'm hoping they don't, can anyone suggest 
> a way round it?

It's not Needle, but MinDI does have parameterized services with the 
same signature for both the service definition and invocation. See 
http://raa.ruby-lang.org/project/mindi. Example:

-----------
require 'mindi'

class SimpleContainer
   extend MinDI::Container

   string { "Hello, world\n" }

   point_at { |x,y| [x,y] }

   stuff { [string, point_at(100,200)] }
end

cont = SimpleContainer.new

p cont.stuff   # ==> ["Hello, world\n", [100, 200]]
-----------

MinDI is only about 100LOC and ruby licensed, so you can hack away...