Question

也许甚至不可能，但这是我的需要。
我有一个密钥映射器的通用实现，还有一个能够生成此类映射器的Factory类

public class KeyMapperFactory 
{
    IKeyMapper<TInternalKey, TExternalKey> GetMapper<TInternalKey, TExternalKey>(MapperConfig config)
}

现在，我希望在应用程序中具有“说清楚”的界面，因此我可以在应用程序中像这样创建另一个空界面

public interface IMapCompanyToPayrollCompany : IKeyMapper<CompanyId, PayrollCompanyId>
{
}

我是否有机会以这种（错误的）方式使用CastleWindsor创建IMapCompanyToPayrollCompany的“即时”实现？

var mapperConfig = MapperConfig {
...
};
var keyMapperFactory = new KeyMapperFactory();
var container = new WindsorContainer();

container.Register(
    Component
        .For<IMapCompanyToPayrollCompany>()
        .UsingFactoryMethod(kernel => (IMapCompanyToPayrollCompany)keyMapperFactory.GetMapper<CompanyId, PayrollCompanyId>(mapperConfig)
);

Answer 1

我使用Castle的DynamicProxies找到了解决方案

// I developed an extension method on the IWindsorContainer
public static void RegisterMapper<TSpeakingInterface, TInternal, TExternal>(this IWindsorContainer container, MapperConfig config) 
    where TSpeakingInterface : IKeyMapper<TInternal, TExternal>
{
    container.Register(
        Component
            .For<IMapCompanyToPayrollCompany>()
            .UsingFactoryMethod(() => {
                var generator = new ProxyGenerator(); // <--Documentation recommend this to be a Singleton for performance and memory reason ... 
                var keyMapperFactory = new KeyMapperFactory();
                var mapper = keyMapperFactory.GetMapper<TInternal, TExternal>(config);
                var interceptor = new KeyMapperInterceptor<TInternal, TExternal>(mapper);

                // see: https://github.com/castleproject/Windsor/issues/224
                var nullProxy = generator.CreateInterfaceProxyWithoutTarget<TSpeakingInterface>();
                return generator.CreateInterfaceProxyWithTarget(nullProxy, interceptor);
            })
    );
}

// Now I can register a mapper this way:
var container = new WindsorContainer();
var config = new MapperConfig {
    [...] // mapper config stuff here
}
container.RegisterMapper<IMapCompanyToPayrollCompany, CompanyId, PayrollCompanyId>(config);

拦截器很简单

public class KeyMapperInterceptor<TInternal, TExternal> : IInterceptor
{
   private readonly IKeyMapper<TInternal, TExternal> realMapper;

   public KeyMapperInterceptor(IKeyMapper<TInternal, TExternal> realMapper)
   {
       this.realMapper = realMapper;
   }

    public void Intercept(IInvocation invocation)
    {
       // We simply call the corresponding method on the realMapper
       var method = invocation.Method;
       invocation.ReturnValue = method.Invoke(realMapper, invocation.Arguments);
    }
}

...并且有效！当然，IMapCompanyToPayrollCompany中不允许使用其他方法或属性，因为拦截器将尝试在不了解任何内容的“ realMapper”上执行/访问它们！

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1 个答案: