Unity 工厂注入 [英] Unity Factory Injection

问题描述

我有一个像下面这样的接口，我将它注入到统一容器中.

I have an interface like the below one which I inject into unity container.

public interface IMyInstanceFactory
{
    IEnumerable<IMyInstance> GetAll();
}

所有 IMyInstance 在运行之前都是已知的，即它们可以在引导程序中设置并且可以从 unity 中检索.我对 IMyInstanceFactory 的具体实现如下:

All IMyInstance are known before runtime i.e they can be setup within the bootstrapper and can be retrieved from unity. My concrete implementation for IMyInstanceFactory is as below:

public class MyInstanceFactory:IMyInstanceFactory
{
    IUnityContainer _container;

    public MyInstanceFactory(IUnityContainer container)
    {
        _container = container;
    }
    public IEnumerable<IMyInstance> GetAll()
    {
        return _container.ResolveAll<IMyInstance>();
    }
}

..在我的引导程序中，我做这样的事情:

..and in my bootstrapper I do something like this:

container.RegisterType<IMyInstance,MyInstance1>;
container.RegisterType<IMyInstance,MyInstance2>;
container.RegisterType<IMyInstance,MyInstance3>;
container.RegisterType<IMyInstanceFactory,MyInstanceFactory>;

这很好地解决了所有问题.但是，我不想依赖容器本身或仅为此实现 IMyInstanceFactory，有没有一种方法可以在不实现 IMyInstanceFactory 的情况下进行设置?Unity 是否为此提供了便利?

This resolves everything beautifully. However, I do not want to take a dependency on the the container as such or implement IMyInstanceFactory just for this, is there a way I can set this up without implementing IMyInstanceFactory? Does Unity provide a facility for this?

这种东西..

container.RegisterType<IMyInstanceFactory,factory=>factory.GetAll()>().IsResolvedBy(unity.ResolveAll<IMyInstance>);

我知道城堡可以做到这一点，Unity 可以做类似的事情吗?

I know castle can do this, can Unity do something similar?

推荐答案

有 Castle Windsor Typed Factory Facilities for Unity 的端口.它将生成您的接口的实现并为您执行 ResolveAll.

There is a port of the Castle Windsor Typed Factory Facilities for Unity. It will generate an implementation of your interface and do the ResolveAll for you.

您的引导代码应如下所示:

Your bootstrapping code should look something like this:

container.RegisterType<IMyInstance,MyInstance1>("1");
container.RegisterType<IMyInstance,MyInstance2>("2");
container.RegisterType<IMyInstance,MyInstance3>("3");
container.RegisterType<IMyInstanceFactory>(new TypedFactory());

对 GetAll 的调用将转换为容器调用 ResolveAll.

The call to GetAll will be translated to the container call ResolveAll.

端口遵循为 Windsor 描述的相同约定.

The port follows the same conventions described for Windsor.

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