lib/prezzo/composable.rb in prezzo-0.4.0 vs lib/prezzo/composable.rb in prezzo-0.4.1

@@ -7,15 +7,27 @@
     end
 
     module ClassMethods
       def composed_by(options)
         options.each do |name, klass|
-          options[name] = klass
+          components << name
 
           define_method(name) do
-            options[name].new(context).calculate
+            cached_components[name] ||= klass.new(context)
+
+            cached_components[name].calculate
           end
         end
       end
+
+      def components
+        @components ||= []
+      end
+    end
+
+    private
+
+    def cached_components
+      @cached_components ||= {}
     end
   end
 end