Question

使用祖先类：

abstract class MyOpenGenericAncestor<T, TOptions>

和后代类：

class MyPartiallyClosedDescendant<T> : MyOpenGenericAncestor<T, MyConcreteOptionsType>

我希望能够使用MyOpenGenericAncestor解析MyPartiallyClosedDescendant，例如：

MyOpenGenericAncestor<T, TOptions> ResolveGeneric<T, TOptions>(TOptions options)
{
    // assume options are used for stuff
    return _container.Resolve<MyOpenGenericAncestor<T, TOptions>();
}

有没有办法实现这个目标？在此代码的当前实现中，注册如下：

var assemblyFilter = new AssemblyFilter("C:\\thePath\", "MyStuff.*.dll");
var myTypes = Classes
    .FromAssemblyInDirectory(assemblyFilter)
    .BasedOn(typeof(MyOpenGenericAncestor<,>))
    .WithServiceBase()
    .LifestyleTransient();

container.Register(myTypes);

通过此注册，MyPartiallyClosedDescendant被注册为组件，但调用ResolveGeneric（myConcreateOptionsInstance）会导致Castle.MicroKernel.ComponentNotFoundException，并显示没有找到支持服务MyOpenGenericAncestor`2 [MyConcreateTType，MyConcreateOptionsType]的组件的消息。获得该异常是有道理的，但有没有办法通过请求祖先来注册和/或解决后代？

Answer 1

在Castle中，为此目的有IGenericImplementationMatchingStrategy。不幸的是我不确定如何在常规注册中使用它，所以至少这个......

public class MyOpenGenericAncestorMatchingStrategy : IGenericImplementationMatchingStrategy
{
    public Type[] GetGenericArguments(ComponentModel model, CreationContext context)
    {
        return new[] { context.GenericArguments[1] };
    }
}

container.Register(Component.For(typeof(MyOpenGenericAncestor<,>))
.ImplementedBy(typeof(MyPartiallyClosedDescendant<>), new MyOpenGenericAncestorMatchingStrategy()));

使用Castle Windsor的开放式通用祖先类型注册/解析部分关闭的通用后代

1 个答案: