我有以下测试
[TestFixture]
public class Test
{
public interface IMy { }
class MyClass : IMy { }
class MyClass2 : IMy { }
[Test]
public static void Go()
{
var builder = new ContainerBuilder();
builder.RegisterType<MyClass>().AsImplementedInterfaces();
builder.RegisterType<MyClass2>().AsImplementedInterfaces();
var container = builder.Build();
var resolved = container.Resolve<IMy>();
Console.WriteLine(resolved);
}
}
为什么当实现明显冲突时它不会抛出异常?如果发现这样的冲突,如何让它抛出异常?
UPDATE 带有注册检查的解决方案几乎可以,但是失败时有简单的情况:
[TestFixture]
public class Test
{
public interface IPlugin
{
}
public interface IMy
{
}
class MyClass : IMy, IPlugin
{
public void Dispose()
{
}
}
class MyClass2 : IPlugin
{
public void Dispose()
{
}
}
public class SingleRegistrationModule : Module
{
protected override void AttachToComponentRegistration(
IComponentRegistry componentRegistry,
IComponentRegistration registration)
{
foreach (var service in registration.Services)
{
var registrations = componentRegistry.RegistrationsFor(service);
if (registrations.Count() > 1)
{
throw new Exception(
"Can't register '{registration.Activator.LimitType}' as '{service}'" +
" because '{registrations.First().Activator.LimitType}' is already registered");
}
}
}
}
[Test]
public static void Go()
{
var builder = new ContainerBuilder();
builder.RegisterType<MyClass>().AsImplementedInterfaces();
builder.RegisterType<MyClass2>().AsImplementedInterfaces();
builder.RegisterModule<SingleRegistrationModule>();
var container = builder.Build();
var resolved = container.Resolve<IMy>();
Console.WriteLine(resolved);
}
}
在这种情况下,没有人解析 IInitializable,因此可以接受多个实现。此外,在某些情况下,多个实现是可以的,例如 IPluginToSomething