Strategy pattern w/ namespaces

strategy.rb

module API
  module Vendor
    class Client
      def hello!
        puts "Vendor Client Hello!"
      end
    end

    class Helper
      def hello!
        puts "Vendor Helper Hello!"
      end
    end
  end

  module Retailer
    class Client
      def hello!
        puts "Retailer Client Hello!"
      end
    end

    class Helper
      def hello!
        puts "Retailer Helper Hello!"
      end
    end
  end

  class Doer
    attr_reader :namespace
    def initialize(namespace)
      @namespace = namespace
    end

    def do
      client.new.hello!
      helper.new.hello!
    end

    def client
      namespace::Client
    end

    def helper
      namespace::Helper
    end
  end
end

# ns = case something
#      when x
#        API::Vendor
#      when y
#        API::Retailer
#      else
#        raise "No namespace match for  #{something}"
#      end
# doer = API::Doer.new(ns)
# doer.do


doer = API::Doer.new(API::Vendor)
doer.do

puts ''

doer = API::Doer.new(API::Retailer)
doer.do

#$ ruby strategy.rb
# Vendor Client Hello!
# Vendor Helper Hello!
#
# Retailer Client Hello!
# Retailer Helper Hello!
#$