[英]Custom construction with open generics in StructureMap
I have a typical repository interface, IRepository<T>
, and lots of concrete repositories. 我有一个典型的存储库接口IRepository<T>
,还有许多具体的存储库。 Most of the concrete repositories look like this: 大多数具体的存储库如下所示:
class ConcreteRepository<T> : IRepository<T> { .. }
These are easy to register with StructureMap: 这些很容易在StructureMap中注册:
For(typeof(IRepository<>)).Use(typeof(ConcreteRepository<>));
However, a select few of my concrete repositories look like this: 但是,我的一些具体存储库中的一部分看起来像这样:
class AbnormalRepository<T1, T2> : IRepository<T1>, IAbnormal<T2> { .. }
I still want to use these abnormal repositories as IRepository<T>
s, so for these I'm currently using special rules: 我仍然想将这些异常存储库用作IRepository<T>
,因此对于这些,我目前正在使用特殊规则:
// this sucks!
For(typeof(IRepository<Foo1>)).Use(typeof(AbnormalRepository<Foo1, Bar1>));
For(typeof(IRepository<Foo2>)).Use(typeof(AbnormalRepository<Foo2, Bar2>));
It would be nice if I could just specify a function that StructureMap could use to construct my repositories, since I know that all of my abnormal repositories implement IAbnormal<T>
. 如果我仅指定一个结构映射可用于构造我的存储库的函数,那将是很好的,因为我知道我所有的异常存储库都实现了IAbnormal<T>
。 Any ideas? 有任何想法吗?
Create a custom IRegistrationConvention and call it from within the Scan() method of your container configuration. 创建一个自定义的IRegistrationConvention并从容器配置的Scan()方法中调用它。
You can see an example of this discussed on another stackoverflow question: 您可以看到关于另一个stackoverflow问题讨论的示例:
StructureMap IRegistrationConvention to register non default naming convention? 使用StructureMap IRegistrationConvention注册非默认命名约定?
You can also see a number of IRegistrationConvention examples within the StructureMap source code itself. 您还可以在StructureMap源代码本身中看到许多IRegistrationConvention示例。
I'm not following your use case all the way, but you can use a function (lambda actually) to construct your object. 我不会一直使用您的用例,但是您可以使用一个函数(实际上是lambda)来构造您的对象。 Use either of the two overloads: 使用两个重载之一:
// lambda with no params
For<IRepository<Foo1>>().Use(() => { ... });
// context is a StructureMap SessionContext
For<IRepository<Foo1>>().Use(context => { ... });
To see what is available off SessionContext, check out http://structuremap.github.com/structuremap/UsingSessionContext.htm 要查看SessionContext可用的内容,请查看http://structuremap.github.com/structuremap/UsingSessionContext.htm
ADDED: 添加:
using System;
using NUnit.Framework;
using StructureMap;
namespace SMTest2
{
public interface IRepository<T> {}
public class AbnormalRepository<T,T2> : IRepository<T>{ }
[TestFixture]
public class TestOpenGeneric
{
private IContainer _container ;
[SetUp]
public void DescribeContainer()
{
_container = new Container(cfg =>
cfg.For(typeof (IRepository<>)).Use(ctx => new AbnormalRepository<String, int>()));
}
[Test]
public void TestItWorks()
{
var stringVector = _container.GetInstance(typeof (IRepository<>));
Assert.IsInstanceOf<AbnormalRepository<String,int>>(stringVector);
}
}
}
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