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();
}
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();
}
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);
}
}