# Factory Method パターン
#
# Java言語で学ぶデザインパターンと同様の例題をRubyで記述した。
#
# coded by Takehiro Kaga
#

class Product
  def use
  end
end

class Factory
  def create(owner)
    p = createProduct(owner)
    registerProduct(p)
    p
  end
  def createProduct(owner)
  end
  def registerProduct(product)
  end
end

class IDCard < Product
  def initialize(owner)
    puts(owner + "のカードを作ります")
    @owner = owner
  end
  def use
    puts(@owner + "のカードを使います")
  end
  def getOwner
    @owner
  end
end

class IDCardFactory < Factory
  def initialize
    @owners = Array.new
  end
  def createProduct(owner)
    IDCard.new(owner)
  end
  def registerProduct(product)
    @owners.push(product.getOwner)
  end
  def getOwners
    @owners
  end
end

# --- Main ---- #

factory = IDCardFactory.new
card1 = factory.create("結城浩")
card2 = factory.create("とむら")
card3 = factory.create("佐藤花子")
card1.use
card2.use
card3.use