Registering a generic abstract class in Castle Windsor

问题

I am trying to register a type by convention, I've simplified my case in this example:

public abstract class BaseEntity{}

public class EntityA : BaseEntity{}

public class EntityB : BaseEntity{}

public abstract class BaseClass
{
    //...
}

public abstract class GenericBaseClass<T> : BaseClass where T : BaseEntity
{
    //..
}

public class ConcreteA : GenericBaseClass<EntityA>
{
    //...
}

public class ConcreteB : GenericBaseClass<EntityB>
{
    //...
}

I'm trying to find the way to register GenericBaseClass to return ConcreteA when requesting for GenericBaseClass<EntityA>. When trying to resolve this, I get an exception saying something like:

Activation error occured while trying to get instance of type GenericBaseClass`1, key ""

If I change the definition of GenericBaseClass<T> from an abstract class to an interface, this registration code works:

container.Register(AllTypes.FromAssemblyContaining<BaseClass>()
         .BasedOn(typeof(GenericBaseClass<>))
         .WithService.FirstInterface());

However, I need to use an abstract class because I need to write code inside of it. I can register manually every ConcreteX class, but it wouldn't be very helpful.

I've tried with this:

container.Register(AllTypes.FromAssemblyContaining<BaseClass>()
         .BasedOn(typeof(GenericBaseClass<>))
         .WithService.Base());

Debugging, I can see the type is not added to the container.

I am using Castle Windsor 2.6.

Thanks.

回答1:

This works:

container.Register(AllTypes.FromAssemblyContaining<ConcreteA>()
                    .BasedOn(typeof (GenericBaseClass<>))
                    .WithService.Base());

If you see types not being added to the container make sure you're scanning the right assembly (the one which contains implementation types, not the service types).

来源：https://stackoverflow.com/questions/7901937/registering-a-generic-abstract-class-in-castle-windsor

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inversion-of-control

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