Exemplo de Abstract Factory
Código
// entry point da aplicacao. Aqui temos 3 tipos de transporte
class Program
{
static void Main(string[] args)
{
if (args.Length == 0)
{
Console.WriteLine("Usage: dotnet run <transport-type>");
Console.WriteLine("Available types: road, sea, air");
return;
}
string transportType = args[0].ToLower();
Logistics logistics = transportType switch
{
"road" => new RoadLogistics(),
"sea" => new SeaLogistics(),
"air" => new AirLogistics(),
_ => throw new ArgumentException($"Unknown transport type: {transportType}. Use 'road', 'sea', or 'air'.")
};
Console.WriteLine($"App: Launched with {transportType.ToUpper()} logistics.");
Console.WriteLine(logistics.PlanDelivery());
}
}
// classe abstrata de logistica que define que cada um dos tipos vai fazer a criacao de um transporte e para todos eles temos um plano de entrega default que so retorna uma string com o modal definido
abstract class Logistics
{
public abstract ITransport CreateTransport();
public string PlanDelivery()
{
var transport = CreateTransport();
var result = "Logistics: Delivery planned using " + transport.Deliver();
return result;
}
}
// implementacoes da abstracao
class RoadLogistics : Logistics
{
public override ITransport CreateTransport()
{
return new Truck();
}
}
class SeaLogistics : Logistics
{
public override ITransport CreateTransport()
{
return new Ship();
}
}
class AirLogistics : Logistics
{
public override ITransport CreateTransport()
{
return new Plane();
}
}
public interface ITransport
{
string Deliver();
}
class Truck : ITransport
{
public string Deliver()
{
return "Truck - Delivering by land in a container";
}
}
class Ship : ITransport
{
public string Deliver()
{
return "Ship - Delivering by sea in a cargo hold";
}
}
class Plane : ITransport
{
public string Deliver()
{
return "Plane - Delivering by air with express service";
}
}