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Factory.dib
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Factory.dib
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#!markdown
# Assembly data type - Generic Factory
#!csharp
public interface IMachine { string Name {get;} }
public class Car: IMachine { public string Name => "Car"; }
public class Truck: IMachine { public string Name => "Truck"; }
public class UnknownMachine: IMachine { public string Name => "Unknown"; }
public class SportCar: IMachine { public string Name => "Ferrari"; }
public class MachineFactory
{
Dictionary<string, Type> machines;
public MachineFactory() => LoadTypesICanReturn();
public IMachine CreateInstance(string description)
{
Type t = GetTypeToCreate(description) ?? typeof(UnknownMachine);
return Activator.CreateInstance(t) as IMachine;
}
private Type GetTypeToCreate(string machineName)
{
return machines.FirstOrDefault(m => m.Key.Contains(machineName)).Value;
}
private void LoadTypesICanReturn()
{
machines = new Dictionary<string, Type>();
var machineInterfaceType = typeof(IMachine);
Type[] typesInThisAssembly = System.Reflection.Assembly.GetExecutingAssembly().GetTypes();
foreach (Type type in typesInThisAssembly)
{
if (type.GetInterfaces().Any(i => i.Name == machineInterfaceType.Name))
{
machines.Add(type.Name.ToLower(), type);
}
}
}
}
var factory = new MachineFactory();
var machine = factory.CreateInstance("car");
display(machine.Name);
machine = factory.CreateInstance("truck");
display(machine.Name);
machine = factory.CreateInstance("FuturisticCar");
display(machine.Name);
machine = factory.CreateInstance("sport");
display(machine.Name);