From: Carlos <angus@...>
Date: 2004-11-21T10:20:29+09:00
Subject: Re: Inner Class Relationship

[James Edward Gray II <james@grayproductions.net>, 2004-11-21 01.22 CET]
> Even if I separate the two classes, my questions remain unchanged:  
> What's a good way to allow one type of object to send private-ish 
> messages to another type of object?
> 
> As for details:  My outer class is a server.  My inner class is a 
> connection for that server.  When a connection ends, I need a way to 
> notify the Server object to remove it from it's maintenance list.  
> That's the message I'm wanting to hide from the outside world.

This is a little contrived, and maybe the best option is to just use a
public method.

class Outer
	def remove x
		puts "removing #{x}"
	end
	private :remove
	
	def initialize
		@exportable_private_methods = {
			"remove" => lambda {|x| remove x}
		}
	end
	
	class Inner
		def initialize outer_methods
			@outer_methods = outer_methods
		end
		
		def run
			puts "running"
			@outer_methods["remove"].call(self)
		end
	end
	
	def run
		Inner.new(@exportable_private_methods).run
	end
end

Outer.new.run

# =>
running
removing #<Outer::Inner:0x402bc2c8>