Ejemplo de como quitar un switch y sustituirlo por una factoria:
public void ProcessCustomer(CustomerMessage message)
{
switch (message.CustomerCategory)
{
case Category.Gold:
ProcessGoldCustomer(message);
break;
case Category.Silver:
ProcessSilverCustomer(message);
break;
case Category.Bronze:
ProcessBronzeCustomer(message);
break;
}
}
Ejemplo con factoría:
public interface ICustomerProcessor
{
void Process(CustomerMessage message);
}
public class GoldCustomerProcessor : ICustomerProcessor {...}
public class SilverCustomerProcessor : ICustomerProcessor {...}
public class BronzeCustomerProcessor : ICustomerProcessor {...}
public class CustomerProcessorFactory
{
public ICustomerProcessor Create(Category category) {
switch (category) {
case Category.Gold:
return new GoldCustomerProcessor();
}
...
}
}
public void ProcessCustomer(CustomerMessage message)
{
var factory = new CustomerProcessorFactory();
var processor = factory.Create(message.CustomerCategory);
processor.Process(message);
}
Ejemplo patrón Tester/Doer:
public interface ICustomerProcessor
{
bool CanProcess(CustomerMessage message);
void Process(CustomerMessage message);
}
public class GoldCustomerProcessor : ICustomerProcessor
{
public bool CanProcess(CustomerMessage message)
{
return message.CustomerCategory == Category.Gold;
}
public void Process(CustomerMessage message) {...}
}
public class SilverCustomerProcessor : ICustomerProcessor {...}
public class BronzeCustomerProcessor : ICustomerProcessor {...}
public void ProcessCustomer(CustomerMessage message)
{
var processor = this.processors.Single(x => x.CanProcess(message));
processor.Process(message);
}
