public string GenerateKey(CarFlyweight flyweight)
{
var elements = new List <string>
{
flyweight.Manufacturer,
flyweight.Model,
flyweight.Color
};
return(string.Join("_", elements));
}
public CarFlyweight GetFlyweight(CarFlyweight flyweight)
{
var key = GenerateKey(flyweight);
if (_flyweights.ContainsKey(key))
{
Console.WriteLine("FlyweightFactory: Reusing existing flyweight");
return(_flyweights[key]);
}
Console.WriteLine("FlyweightFactory: Adding new flyweight");
_flyweights.Add(key, flyweight);
return(flyweight);
}
public static void Execute()
{
var factory = new FlyweightFactory(new List <CarFlyweight>
{
new CarFlyweight {
Manufacturer = "Chevrolet", Model = "Camaro", Color = "Orange"
},
new CarFlyweight {
Manufacturer = "BMW", Model = "X6", Color = "White"
},
new CarFlyweight {
Manufacturer = "Opel", Model = "Astra I", Color = "Pink"
},
new CarFlyweight {
Manufacturer = "Opel", Model = "Astra II", Color = "Blue"
},
new CarFlyweight {
Manufacturer = "BMW", Model = "X6", Color = "Orange"
}
});
factory.ListFlyweights();
var car1 = new Car
{
Owner = "John Doe",
Number = "AMS8786",
Manufacturer = "Opel",
Model = "Astra I",
Color = "Pink"
};
car1.Flyweight = factory.GetFlyweight(car1.Flyweight);
factory.ListFlyweights();
var car2 = new Car
{
Owner = "Ewa Ewowska",
Number = "AAMS886",
Manufacturer = "Opel",
Model = "Astra I",
Color = "Black"
};
car2.Flyweight = factory.GetFlyweight(car2.Flyweight);
factory.ListFlyweights();
var car3 = new Car
{
Owner = "Ewa Ewowska",
Number = "ASK99210",
Manufacturer = "Opel",
Model = "Astra I",
Color = "Black"
};
car3.Flyweight = factory.GetFlyweight(car3.Flyweight);
factory.ListFlyweights();
car2.Flyweight.Operation(car2);
car3.Flyweight.Operation(car3);
//car3.Manufacturer = "ABC";
var newFlyweight = new CarFlyweight()
{
Color = car3.Color, Manufacturer = "ABC", Model = car3.Model
};
car3.Flyweight = factory.GetFlyweight(newFlyweight);
car2.Flyweight.Operation(car2);
car3.Flyweight.Operation(car3);
}
