Module: Composite::ClassMethods

Defined in:
lib/composite.rb

Overview

Internal module to extend class that includes this module. This trick of getting around the fact that module methods aren’t inherited when a module is included is from: wiki.rubyonrails.org/rails/pages/SimpleAccessControlExample

Instance Method Summary collapse

Instance Method Details

#part(*parts, &block) ⇒ Object

Metaprogramming keyword to define ‘part’ instance variables that automatically call compose/decompose on access.



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# File 'lib/composite.rb', line 23

def part (*parts, &block)
  parts.each do |aPart|
    set_method = (aPart.to_s+'=').to_sym
    get_method = aPart.to_sym
    instance = ('@'+aPart.to_s).to_sym
    send :define_method, get_method do ||
      decompose
      instance_variable_get instance
    end
    send :define_method, set_method do |a|
      decompose
      #call.block
      instance_variable_set instance, a
      compose
    end
  end
end