Esempio n. 1
0
        static void Main(string[] args)
        {
            var apple = new Product("Apple", Enums.Color.Green, Enums.Size.Small);
            var tree  = new Product("Tree", Enums.Color.Green, Enums.Size.Large);
            var house = new Product("House", Enums.Color.Blue, Enums.Size.Large);

            Product[] products = { apple, tree, house };

            var pf = new ProductFilter();

            Console.WriteLine("Green products (old):");
            foreach (var p in pf.FilterByColor(products, Enums.Color.Green))
            {
                Console.WriteLine($" - {p.Name} is green");
            }

            // ^^ BEFORE

            // vv AFTER
            var bf = new BetterFilter();

            Console.WriteLine("Green products (new):");
            foreach (var p in bf.Filter(products, new ColorSpecification(Enums.Color.Green)))
            {
                Console.WriteLine($" - {p.Name} is green");
            }

            Console.WriteLine("Large products");
            foreach (var p in bf.Filter(products, new SizeSpecification(Enums.Size.Large)))
            {
                Console.WriteLine($" - {p.Name} is large");
            }

            Console.WriteLine("Large blue items");
            foreach (var p in bf.Filter(products,
                                        new AndSpecification <Product>(new ColorSpecification(Enums.Color.Blue), new SizeSpecification(Enums.Size.Large)))
                     )
            {
                Console.WriteLine($" - {p.Name} is big and blue");
            }

            Console.ReadLine();
        }
Esempio n. 2
0
        static void Main(string[] args)
        {
            var apple = new Product("Apple", Enums.Color.Green, Enums.Size.Small);
            var tree  = new Product("Tree", Enums.Color.Green, Enums.Size.Large);
            var house = new Product("Houses", Enums.Color.Blue, Enums.Size.Large);

            Product[] products =
            {
                apple,
                tree,
                house
            };

            var productFilter = new ProductFilter();

            Console.WriteLine(@"Green products (OLD): ");

            foreach (var product in productFilter.FilterByColor(products, Enums.Color.Green))
            {
                Console.WriteLine($"{product.Name} is green");
            }

            var betterFilter = new BetterFilter();

            Console.WriteLine(@"Green products (NEW): ");

            foreach (var product in betterFilter.Filter(products, new ColorSpecification(Enums.Color.Green)))
            {
                Console.WriteLine($"{product.Name} is green");
            }

            Console.WriteLine(@"Green and Small products (NEW): ");

            foreach (var product in betterFilter.Filter(products,
                                                        new AndSpecification <Product>(new ColorSpecification(Enums.Color.Green),
                                                                                       new SizeSpecification(Enums.Size.Small))))
            {
                Console.WriteLine($"{product.Name} is green and small");
            }

            Console.ReadLine();
        }
Esempio n. 3
0
        static void Main(string[] args)
        {
            Product apple = new Product("Apple", Color.Red, Size.Small);
            Product tree  = new Product("Tree", Color.Green, Size.Large);
            Product house = new Product("House", Color.Blue, Size.Huge);

            Product[] products = { apple, tree, house };

            Console.WriteLine("Green products(old)");
            ProductFilter pf = new ProductFilter();

            foreach (Product product in pf.FilterByColor(products, Color.Green))
            {
                Console.WriteLine(product);
            }

            Console.WriteLine("Green products(new)");
            ColorSpecification    greenSpecification = new ColorSpecification(Color.Green);
            BetterFilter          betterFilter       = new BetterFilter();
            IEnumerable <Product> greenProducts      = betterFilter.Filter(products, greenSpecification);

            foreach (Product product in greenProducts)
            {
                Console.WriteLine(product);
            }

            Console.WriteLine("Green and Large products");
            SizeSpecification          largeSpecification = new SizeSpecification(Size.Large);
            AndSpecification <Product> andSpecification   =
                new AndSpecification <Product>(greenSpecification, largeSpecification);

            IEnumerable <Product> andProducts = betterFilter.Filter(products, andSpecification);

            foreach (Product product in andProducts)
            {
                Console.WriteLine(product);
            }
        }