How to use custom injection attribute for properties when using StructureMap?
I would like to have my own injection attribute so that I am not coupling my code to a particular IOC framework. I have a custom injection attribute that my code uses to denote that a property should be injected.
public class CustomIn开发者_StackOverflow社区jectAttribute : Attribute {}
Fictitious example below...
public class Robot : IRobot
{
[CustomInject]
public ILaser Zap { get; set; }
...
}
In Ninject, you can setup an injection Heuristic to find that attribute, and inject like;
public class NinjectInjectionHeuristic : NinjectComponent, IInjectionHeuristic, INinjectComponent, IDisposable
{
public new bool ShouldInject(MemberInfo member)
{
return member.IsDefined(typeof(CustomInjectAttribute), true);
}
}
and then register the heuristic with the kernel.
Kernel.Components.Get<ISelector>().InjectionHeuristics.Add(new NinjectInjectionHeuristic());
How would I go about achieving this with StructureMap. I know StructureMap has its own SetterProperties and attributes, but I'm looking for a way to decouple from that as you can with Ninject in the above example.
Use the SetAllProperties() method in your ObjectFactory or Container configuration. For example:
new Container(x =>
{
x.SetAllProperties(by =>
{
by.Matching(prop => prop.HasAttribute<CustomInjectAttribute>());
});
});
This makes use of a handy extension method (that should be in the BCL):
public static bool HasAttribute<T>(this ICustomAttributeProvider provider) where T : Attribute
{
return provider.GetCustomAttributes(typeof (T), true).Any();
}
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