Update factory method example

Author: nemanjarogic

.editorconfig

@@ -0,0 +1,10 @@
+namespace RestaurantManagement.Common;
+
+/// <summary>
+/// The Product declares the interface, which is common to all objects that
+/// can be produced by the creator <see cref="Restaurant"/> and its subclasses.
+/// </summary>
+public interface IMeal
+{
+    void ShowDescription();
+}

src/CreationalPatterns/FactoryMethod/RestaurantManagement/Common/IMeal.cs

@@ -1,6 +1,4 @@
-using RestaurantManagement.Meals.Common;
-
-namespace RestaurantManagement.Restaurants.Common;
+namespace RestaurantManagement.Common;
 
 /// <summary>
 /// The Creator class declares the factory method that returns new product objects.
@@ -28,4 +26,4 @@ public void OrderDailySpecial()
         var mainCourse = PrepareMainCourse();
         mainCourse.ShowDescription();
     }
-}
+}

…agement/Restaurants/Common/Restaurant.cs …estaurantManagement/Common/Restaurant.cssrc/CreationalPatterns/FactoryMethod/RestaurantManagement/Restaurants/Common/Restaurant.cs renamed to src/CreationalPatterns/FactoryMethod/RestaurantManagement/Common/Restaurant.cs src/CreationalPatterns/FactoryMethod/RestaurantManagement/Restaurants/Common/Restaurant.cs renamed to src/CreationalPatterns/FactoryMethod/RestaurantManagement/Common/Restaurant.cs

@@ -1,7 +1,7 @@
 using System.Reflection;
 using DesignPatternsLibrary.PatternExecutors;
-using RestaurantManagement.Restaurants;
-using RestaurantManagement.Restaurants.Common;
+using RestaurantManagement.Common;
+using RestaurantManagement.FastFood;
 
 namespace RestaurantManagement;
 
@@ -11,16 +11,17 @@ public class Executor : PatternExecutor
 
     public override void Execute()
     {
-        Restaurant restaurant = InitializeRestaurant();
-
+        var restaurant = InitializeRestaurant();
         restaurant.OrderDailySpecial();
     }
 
-    private Restaurant InitializeRestaurant()
+    private static Restaurant InitializeRestaurant()
     {
-        // This is usually stored within some configuration
-        var choosenType = typeof(FastFoodRestaurant).FullName;
+        // Choose between FastFoodRestaurant and VegetarianRestaurant.
+        // The choice is hardcoded here, but it's usually made through some configuration.
+        var chosenType = typeof(FastFoodRestaurant).FullName!;
 
-        return Assembly.GetExecutingAssembly().CreateInstance(choosenType) as Restaurant;
+        var restaurant = Assembly.GetExecutingAssembly().CreateInstance(chosenType) as Restaurant;
+        return restaurant!;
     }
-}
+}

src/CreationalPatterns/FactoryMethod/RestaurantManagement/Executor.cs

@@ -0,0 +1,11 @@
+using RestaurantManagement.Common;
+
+namespace RestaurantManagement.FastFood;
+
+/// <summary>
+/// Concrete creators override the base factory method so it returns a different type of product.
+/// </summary>
+public class FastFoodRestaurant : Restaurant
+{
+    public override IMeal PrepareMainCourse() => new Hamburger();
+}

src/CreationalPatterns/FactoryMethod/RestaurantManagement/FastFood/FastFoodRestaurant.cs

@@ -1,14 +1,12 @@
-using RestaurantManagement.Meals.Common;
+using RestaurantManagement.Common;
 
-namespace RestaurantManagement.Meals;
+namespace RestaurantManagement.FastFood;
 
 /// <summary>
 /// Concrete products are different implementations of the product interface <see cref="IMeal"/>.
 /// </summary>
 public class Hamburger : IMeal
 {
-    public void ShowDescription()
-    {
+    public void ShowDescription() =>
         Console.WriteLine("Hamburger - with beef meat, Worcestershire sauce and cheese.");
-    }
-}
+}

…/RestaurantManagement/Meals/Hamburger.cs …staurantManagement/FastFood/Hamburger.cssrc/CreationalPatterns/FactoryMethod/RestaurantManagement/Meals/Hamburger.cs renamed to src/CreationalPatterns/FactoryMethod/RestaurantManagement/FastFood/Hamburger.cs src/CreationalPatterns/FactoryMethod/RestaurantManagement/Meals/Hamburger.cs renamed to src/CreationalPatterns/FactoryMethod/RestaurantManagement/FastFood/Hamburger.cs

@@ -1,14 +1,12 @@
-using RestaurantManagement.Meals.Common;
+using RestaurantManagement.Common;
 
-namespace RestaurantManagement.Meals;
+namespace RestaurantManagement.Vegetarian;
 
 /// <summary>
 /// Concrete products are different implementations of the product interface <see cref="IMeal"/>.
 /// </summary>
 public class GreenSalad : IMeal
 {
-    public void ShowDescription()
-    {
+    public void ShowDescription() =>
         Console.WriteLine("Green salad - with lettuce, cucumber and green olives");
-    }
-}
+}