static void Main(string[] args)
{
var apple = new Product("Apple", Color.Green, Size.Small, Price.Cheap);
var tree = new Product("Tree", Color.Green, Size.Large, Price.Affordable);
var house = new Product("House", Color.Blue, Size.Large, Price.Expensive);
var car = new Product("Car", Color.Red, Size.Large, Price.Expensive);
Product[] products = { apple, tree, house, car };
var pf = new ProductFilter();
WriteLine("Green products (old):");
foreach (var p in pf.FilterByColor(products, Color.Green))
{
WriteLine($" - {p.Name} is green");
}
// ^^ BEFORE
// vv AFTER
// using the better filter// filter takes array of products and color specification as green as argument.
// loop over each product and return the Name of product that matches that specific color Green
var bf = new BetterFilter();
WriteLine("Green products (new):");
foreach (var p in bf.Filter(products, new ColorSpecification(Color.Green)))
{
WriteLine($" - {p.Name} is green");
}
WriteLine("Large products");
foreach (var p in bf.Filter(products, new SizeSpecification(Size.Large)))
{
WriteLine($" - {p.Name} is large");
}
// using the
WriteLine("Large blue, expensive items");
foreach (var p in bf.Filter(products,
new AndSpecification <Product>(new ColorSpecification(Color.Blue), new SizeSpecification(Size.Large), new PriceSpecification(Price.Expensive))))
{
WriteLine($" - {p.Name} is big, blue and expensive");
}
}
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();
}
