Mega Code Archive
Automatically Initializing Mixed-In Modules
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class Class
def included_modules
@included_modules ||= []
end
alias_method :old_new, :new
def new(*args, &block)
obj = old_new(*args, &block)
self.included_modules.each do |mod|
mod.initialize if mod.respond_to?(:initialize)
end
obj
end
end
module Initializable
def self.included(mod)
mod.extend ClassMethods
end
module ClassMethods
def included(mod)
if mod.class != Module #in case Initializeable is mixed-into a class
puts "Adding #{self} to #{mod}'s included_modules" if $DEBUG
mod.included_modules << self
end
end
end
end
module A
include Initializable
def self.initialize
puts "A's initialized."
end
end
module B
include Initializable
def self.initialize
puts "B's initialized."
end
end
class BothAAndB
include A
include B
end
both = BothAAndB.new
# A's initialized.
# B's initialized.
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