如何使用Unity解决工厂问题

Question

我目前有以下代码来创建两个工厂。

//Composition Root
ICatalogFilterRepository catalogFilterRepositoryRedis = new RedisCatalogFilterRepository();
ICatalogFilterRepository catalogFilterRepositorySql = new SqlCatalogFilterRepository();

IFilterCreatorService filterCreatorServiceRedis = new FilterCreatorService(catalogFilterRepositoryRedis);
IFilterCreatorService filterCreatorServiceSql = new FilterCreatorService(catalogFilterRepositorySql);
IFilterCreatorServiceFactory filterCreatorServiceFactory = new FilterCreatorServiceFactory(filterCreatorServiceRedis, filterCreatorServiceSql);

ICatalogService catalogServiceCs = new CommerceServerWsService();
ICatalogService catalogServiceRedis = new CatalogService(catalogFilterRepositoryRedis);
ICatalogService catalogServiceSql = new CatalogService(catalogFilterRepositorySql);
ICatalogServiceFactory commerceServerCatalogServiceFactory = new CatalogServiceFactory(catalogServiceCs, catalogServiceRedis, catalogServiceSql);

现在我想使用Unity，所以我在Unity上面注册如下：

//Configure the Unity container.
IUnityContainer myContainer = new UnityContainer()
    .RegisterType<ICatalogFilterRepository, RedisCatalogFilterRepository>("Redis")
    .RegisterType<ICatalogFilterRepository, SqlCatalogFilterRepository>("Sql")
    .RegisterType<IFilterCreatorService, FilterCreatorService>()
    .RegisterType<IFilterCreatorServiceFactory, FilterCreatorServiceFactory>()
    .RegisterType<ICatalogService, CommerceServerWsService>()
    .RegisterType<ICatalogService, CatalogService>()
    .RegisterType<ICatalogServiceFactory, CatalogServiceFactory>();

IFilterCreatorServiceFactory filterCreatorServiceFactory = myContainer.Resolve<IFilterCreatorServiceFactory>();
ICatalogServiceFactory commerceServerCatalogServiceFactory = myContainer.Resolve<ICatalogServiceFactory>();

但它不起作用。我得到一个例外。在某种程度上，我需要告诉Unity在工厂构造函数中注入哪些具体类。是否使用覆盖？请帮我解决这个问题。 FilterCreatorServiceFactory：

public class FilterCreatorServiceFactory : IFilterCreatorServiceFactory
{
    private readonly IFilterCreatorService _filterCreatorServiceRedis;
    private readonly IFilterCreatorService _filterCreatorServiceSql;

    public FilterCreatorServiceFactory(IFilterCreatorService filterCreatorServiceRedis, IFilterCreatorService filterCreatorServiceSql)
    {
        if (filterCreatorServiceRedis == null)
            throw new ArgumentNullException("filterCreatorServiceRedis");

        if (filterCreatorServiceSql == null)
            throw new ArgumentNullException("filterCreatorServiceSql");


        _filterCreatorServiceRedis = filterCreatorServiceRedis;
        _filterCreatorServiceSql = filterCreatorServiceSql;
    }

    public IFilterCreatorService Create(string filterRepositoryName)
    {
        if (filterRepositoryName == "Redis")
            return _filterCreatorServiceRedis;

        if (filterRepositoryName == "Sql")
            return _filterCreatorServiceSql;

        throw new Exception("filterRepositoryName " + filterRepositoryName + " is not valid");
    }
}