Component delegation experiment

DirtyDelegation.rb

class Component
	
	attr_accessor :property, :another_property
	
end

class Entity
	
	def initialize()
		@components = {};
	end
	
	def add_component(name, comp)
		
		raise "Component already exists." unless @components[name].nil?
		@components[name] = comp
		
		@components[name].public_methods(false).each do |method|
			
			str = %Q{
				def #{method}(*args, &block)
					@components["#{name}"].__send__(:#{method}, *args, &block)
				end
			}
			
			instance_eval(str, __FILE__, __LINE__)
			
		end
		
	end
	
	def remove_component(name)
		
		return if @components[name].nil?
		
		str = %Q{
			class << self
				#{@components[name].public_methods(false).map{|x| "remove_method :#{x}"}.join(";")}
			end
		}
		
		instance_eval(str, __FILE__, __LINE__)
		
		removed_component = @components[name]
		
		@components[name] = nil
		
		return removed_component
		
	end

	
end

entity = Entity.new()
p "Entity methods init: #{entity.public_methods(false)}"

comp = Component.new()

p "Component methods: #{comp.public_methods(false)}"

entity.add_component("comp", comp);

p "Entity methods post: #{entity.public_methods(false)}"

entity.property = "test"

p "Entity property value: #{entity.property}"

entity.remove_component("comp")

p "Entity methods after removing comp: #{entity.public_methods(false)}"