Mixins is a powerfull feature that enables developers to add new logic/properties to an object by automatically implementing interfaces. Aspect containing a mixin will create members in target similar to interface’s and proxy them back to the aspect.
Consider scnerio where you want to add a property to a target:
public class Target
{
public void Do() {}
}
For this you need to create an interface that describes features you want to add:
public interface IHaveProperty
{
string Data { get; set; }
}
then we will create an aspect:
[Aspect(Scope.Global)]
[Injection(typeof(MyAspect))]
[Mixin(typeof(IHaveProperty))]
public class MyAspect: Attribute, IHaveProperty
{
public string Data { get; set; }
}
And finally if apply this new aspect-attribute to Target will make look like (after compilation):
[MyAspect]
public class Target : IHaveProperty
{
string IHaveProperty.Data
{
get
{
return ((IHaveProperty)My1Aspect.__a$_instance).Data;
}
set
{
((IHaveProperty)My1Aspect.__a$_instance).Data = value;
}
}
public void Do()
{
}
}
Note that it isn’t necessary to apply aspect to Target class itself, it is enough to apply it any member, like this:
public class Target
{
[MyAspect]
public void Do() {}
}