如何从堆栈框架中获取通用参数的类型? [英] How do you get the type of generic argument from the stackframe?

问题描述

我们应该通过工厂实例化我们的实体，因为它们在客户端和服务器上的设置不同.我想确保是这种情况，但无法完全正常工作.

We are supposed to instantiate our entities through a factory since they are set up differently on the client and server. I want to make sure this is the case but cant quite get it to work.

public interface IEntityFactory
{
    TEntity Create<TEntity>() where TEntity : new();
}

public abstract class Entity
{
    protected Entity()
    {
        VerifyEntityIsCreatedThroughFactory();
    }

    [Conditional("DEBUG")]
    private void VerifyEntityIsCreatedThroughFactory()
    {
        foreach (var methodBase in new StackTrace().GetFrames().Select(x => x.GetMethod()))
        {
            if (!typeof(IEntityFactory).IsAssignableFrom(methodBase.DeclaringType)
                || methodBase.Name != "Create")
                continue;

            // The generic type is TEnitiy but I want the provided type!
            if (methodBase.GetGenericArguments()[0] != GetType())
                Debug.Fail(string.Format("Use factory when creating {0}.", GetType().Name));
        }
    }
}

推荐答案

是否可以从结构上而不是在运行时解决?您可以将实体和工厂隔离在不同的程序集中，然后为实体构造函数指定internal作用域，以便仅工厂可以调用它们吗?

Is possible to address this structurally instead of at runtime? Can you segregate your entities and the factory in a different assembly, then give the entity constructors internal scoping so that only the factory is able to invoke them?

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