Factory method Ruby

Author: peterstefanov

FactoryMethod/abstract_factory.rb

@@ -0,0 +1,14 @@
+
+class AbstractFactory
+
+  @@instance = nil
+
+  def self.register(instance)
+    @@instance = instance
+  end
+
+  def self.instance
+    return @@instance
+  end
+
+end

FactoryMethod/client.rb

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+#
+# ABSTRACT FACTORY EXERCISE
+# 
+require_relative 'abstract_factory.rb'
+require_relative 'concrete_factory_normal.rb'
+require_relative 'concrete_factory_cool.rb'
+require_relative 'concrete_factory_deadly.rb'
+
+class Client 
+
+	def initialize(productType)
+
+    if productType == :normal
+       ConcreteFactoryNormal.register
+		elsif productType == :cool
+			ConcreteFactoryCool.register
+		elsif productType == :deadly
+			ConcreteFactoryDeadly.register
+		else
+			raise "Unknown product type: #{productType}"
+		end
+		@factory_product_type = AbstractFactory.instance
+
+
+		@prod_A = @factory_product_type.create_product_A
+		@prod_B = @factory_product_type.create_product_B
+		@prod_C = @factory_product_type.create_product_C
+		@prod_D = @factory_product_type.create_product_D
+	end
+
+	def foo
+		@prod_A.do_your_stuff
+		@prod_B.do_it
+		@prod_C.perform
+		@prod_D.do_cool_stuff
+	end
+
+end
+
+
+

FactoryMethod/concrete_factory_cool.rb

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+require_relative 'abstract_factory.rb'
+require_relative 'product_a_cool.rb'
+require_relative 'product_b_cool.rb'
+require_relative 'product_c_cool.rb'
+require_relative 'product_d_cool.rb'
+
+class ConcreteFactoryCool < AbstractFactory
+
+  def self.register
+    superclass.register(ConcreteFactoryCool.new)
+  end
+
+  def create_product_A
+    ProductACool.new
+  end
+
+  def create_product_B
+    ProductBCool.new
+  end
+
+  def create_product_C
+    ProductCCool.new
+  end
+
+  def create_product_D
+    ProductDCool.new
+  end
+end

FactoryMethod/concrete_factory_deadly.rb

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+require_relative 'abstract_factory.rb'
+require_relative 'product_a_deadly.rb'
+require_relative 'product_b_deadly.rb'
+require_relative 'product_c_deadly.rb'
+require_relative 'product_d_deadly.rb'
+
+class ConcreteFactoryDeadly < AbstractFactory
+
+  def self.register
+    superclass.register(ConcreteFactoryDeadly.new)
+  end
+
+  def create_product_A
+    ProductADeadly.new
+  end
+
+  def create_product_B
+    ProductBDeadly.new
+  end
+
+  def create_product_C
+    ProductCDeadly.new
+  end
+
+  def create_product_D
+    ProductDDeadly.new
+  end
+end

FactoryMethod/concrete_factory_normal.rb

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+require_relative 'abstract_factory.rb'
+require_relative 'product_a_normal.rb'
+require_relative 'product_b_normal.rb'
+require_relative 'product_c_normal.rb'
+require_relative 'product_d_normal.rb'
+
+class ConcreteFactoryNormal < AbstractFactory
+
+  def self.register
+    superclass.register(ConcreteFactoryNormal.new)
+  end
+
+  def create_product_A
+    ProductANormal.new
+  end
+
+  def create_product_B
+    ProductBNormal.new
+  end
+
+  def create_product_C
+    ProductCNormal.new
+  end
+
+  def create_product_D
+    ProductDNormal.new
+  end
+end

FactoryMethod/main.rb

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+require_relative 'client.rb'
+
+my_client = Client.new(:cool)
+my_client.foo
+

FactoryMethod/product_a.rb

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+
+class ProductA
+
+  def do_your_stuff
+    raise "Abstract method"
+  end
+
+end

FactoryMethod/product_a_cool.rb

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+require_relative 'product_a.rb'
+
+class ProductACool < ProductA
+
+  def do_your_stuff
+    puts "I'm a #{self.class.name}, doing my stuff"
+  end
+
+end

FactoryMethod/product_a_deadly.rb

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+require_relative 'product_a.rb'
+
+class ProductADeadly < ProductA
+
+  def do_your_stuff
+    puts "I'm a #{self.class.name}, doing my stuff"
+  end
+
+end

FactoryMethod/product_a_normal.rb

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+require_relative 'product_a.rb'
+
+class ProductANormal < ProductA
+
+  def do_your_stuff
+    puts "I'm a #{self.class.name}, doing my stuff"
+  end
+
+end

FactoryMethod/product_b.rb

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+
+class ProductB
+
+  def do_it
+    raise "Abstract method"
+  end
+
+end

FactoryMethod/product_b_cool.rb

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+require_relative 'product_b.rb'
+
+class ProductBCool < ProductB
+
+  def do_it
+    puts "I'm a #{self.class.name}, doing it"
+  end
+
+end

FactoryMethod/product_b_deadly.rb

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+require_relative 'product_b.rb'
+
+class ProductBDeadly < ProductB
+
+  def do_it
+    puts "I'm a #{self.class.name}, doing it"
+  end
+
+end

FactoryMethod/product_b_normal.rb

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+require_relative 'product_b.rb'
+
+class ProductBNormal < ProductB
+
+  def do_it
+    puts "I'm a #{self.class.name}, doing it"
+  end
+
+end

FactoryMethod/product_c.rb

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+
+class ProductC
+
+  def perform
+    raise "Abstract method"
+  end
+
+end

FactoryMethod/product_c_cool.rb

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+require_relative 'product_c.rb'
+
+class ProductCCool < ProductC
+
+  def perform
+    puts "I'm a #{self.class.name}, performing"
+  end
+
+end

FactoryMethod/product_c_deadly.rb

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+require_relative 'product_c.rb'
+
+class ProductCDeadly < ProductC
+
+  def perform
+    puts "I'm a #{self.class.name}, performing"
+  end
+
+end

FactoryMethod/product_c_normal.rb

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+require_relative 'product_c.rb'
+
+class ProductCNormal < ProductC
+
+  def perform
+    puts "I'm a #{self.class.name}, performing"
+  end
+
+end

FactoryMethod/product_d.rb

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+
+class ProductD
+
+  def do_cool_stuff
+    raise "Abstract method"
+  end
+
+end

FactoryMethod/product_d_cool.rb

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+require_relative 'product_d.rb'
+
+class ProductDCool < ProductD
+
+  def do_cool_stuff
+    puts "I'm a #{self.class.name}, doing a very cool stuff"
+  end
+
+end

FactoryMethod/product_d_deadly.rb

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+require_relative 'product_d.rb'
+
+class ProductDDeadly < ProductD
+
+  def do_cool_stuff
+    puts "I'm a #{self.class.name}, doing a very cool stuff"
+  end
+
+end

FactoryMethod/product_d_normal.rb

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+require_relative 'product_d.rb'
+
+class ProductDNormal < ProductD
+
+  def do_cool_stuff
+    puts "I'm a #{self.class.name}, doing a very cool stuff"
+  end
+
+end