static void SOLIDOpenClosed() { var apple = new Product("Apple", Color.Green, Size.Small); var tree = new Product("Tree", Color.Green, Size.Large); var house = new Product("House", Color.Blue, Size.Large); Product[] products = { apple, tree, house }; var pf = new ProductFilter(); Console.WriteLine("Green products (old):"); foreach (var p in pf.FilterByColor(products, Color.Green)) { Console.WriteLine($" - {p.Name} is green"); } // ^^ BEFORE // vv AFTER var bf = new BetterFilter(); Console.WriteLine("Green products (new):"); foreach (var p in bf.Filter(products, new ColorSpecification(Color.Green))) { Console.WriteLine($" - {p.Name} is green"); } Console.WriteLine("Large products"); foreach (var p in bf.Filter(products, new SizeSpecification(Size.Large))) { Console.WriteLine($" - {p.Name} is large"); } Console.WriteLine("Large blue items"); foreach (var p in bf.Filter(products, new BanchOfSpecifications <Product>(new ColorSpecification(Color.Blue), new SizeSpecification(Size.Large))) ) { Console.WriteLine($" - {p.Name} is big and blue"); } }
static void Main2(string[] args) { var apple = new Product("Apple", Color.Green, Size.Small); var tree = new Product("Tree", Color.Green, Size.Large); var house = new Product("House", Color.Blue, Size.Large); Product[] products = { apple, tree, house }; var pf = new ProductFilter(); WriteLine("Green products (old):"); foreach (var p in pf.FilterByColor(products, Color.Green)) { WriteLine($" - {p.Name} is green"); } // ^^ BEFORE // vv AFTER /* var bf = new BetterFilter(); * WriteLine("Green products (new):"); * foreach (var p in bf.Filter(products, new ColorSpecification(Color.Green))) * WriteLine($" - {p.Name} is green"); * * WriteLine("Large products"); * foreach (var p in bf.Filter(products, new SizeSpecification(Size.Large))) * WriteLine($" - {p.Name} is large"); * * WriteLine("Large blue items"); * foreach (var p in bf.Filter(products, * new AndSpecification<Product>(new ColorSpecification(Color.Blue), new SizeSpecification(Size.Large))) * ) * { * WriteLine($" - {p.Name} is big and blue"); * }*/ }
static void Main(string[] args) { var apple = new Product("Apple", Color.Green, Size.Small); var tree = new Product("Tree", Color.Green, Size.Large); var house = new Product("House", Color.Blue, Size.Large); Product[] products = { apple, tree, house }; var pf = new ProductFilter(); Console.WriteLine("Green Products (old): "); foreach (var p in pf.FilterByColor(products, Color.Green)) { Console.WriteLine($"- {p.Name} is green"); } var bf = new BetterFilter(); Console.WriteLine("Green Prodcuts (new) : "); foreach (var p in bf.Filter(products, new ColorSpecification(Color.Green))) { Console.WriteLine($"- {p.Name} is green"); } }