static void Main(string[] args)
{
var apple = new Product("Apple", Color.Red, Size.Small);
var tree = new Product("Tree", Color.Green, Size.Large);
var house = new Product("House", Color.Blue, Size.Large);
Product[] products = new[] { apple, tree, house };
var pf = new ProductFilter();
Console.WriteLine("Green products (old)");
foreach (var p in pf.FilterBySize(products, Size.Large))
{
Console.WriteLine($"- {p.Name} is is {Size.Large} ");
}
var bf = new BetterFilter();
Console.WriteLine("Green Products");
foreach (var p in bf.Filter(products, new ColorSpecification(Color.Green)))
{
Console.WriteLine($" - {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($"- {p.Name} is big and blue");
}
Console.ReadKey();
}
static void Main(string[] args)
{
var apple = new Product("Apple", Color.Green, Size.Small); // creating new product 💫
var tree = new Product("Tree", Color.Green, Size.Large);
var house = new Product("House", Color.Blue, Size.Huge);
Product[] products = { apple, tree, house };
var productFilter = new ProductFilter();
Console.WriteLine($"Green products (old): ");
foreach (var p in productFilter.FilterByColor(products, Color.Green))
{
Console.WriteLine($" - {p.Name} is green.");
}
// now using better filter
var betterFilter = new BetterFilter();
Console.WriteLine("Green products (new): ");
foreach (var p in betterFilter.Filter(products, new ColorSpecification(Color.Green)))
{
Console.WriteLine($" - {p.Name} is green.");
}
Console.WriteLine("Large Blue Items : ");
foreach (var p in betterFilter.Filter(products,
new AddSpecification <Product>(new ColorSpecification(Color.Blue), new SizeFilter(Size.Huge))))
{
Console.WriteLine($" - {p.Name} is big & blue.");
}
Console.ReadKey();
}