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