ama-team / ruby-entity-mapper

require_relative '../type'

module AMA

  module Entity

    class Mapper

      class Type

        # A reference for parameter defined in particular type

        # Acts as a proxy, delegating method calls to whatever lies as specified

        # parameter in owner

        class Parameter < Type

          attr_reader :owner

          attr_reader :id

          # @param [AMA::Entity::Mapper::Type] owner

          # @param [Symbol] id

          def initialize(owner, id)

            @owner = owner

            @id = id

          end

          def to_s

            "Parameter (reference) type for variable type :#{id} " \

              "(declared in #{owner})"

          end

          def hash

            @owner.hash ^ @id.hash

          end

          Type.instance_methods.each do |method|

            next if method_defined?(method)

            define_method(method) do |*args|

              @owner.parameters[@id].send(method, *args)

            end

          end

        end

      end

    end

  end

end