Structuremap Configuration with generics

Question

I have IRepository interface with which i want to use NHibernateRepository.

How do i configure it with structure map?

protected void ConfigureDependencies()
{
    ObjectFactory.Initialize(
        x =>
            {
                x.For<ILogger>().Use<Logger>();
                x.For<IRepository<T>>().Use<NHibernateRepository<T>>();
            }
        );
}

I m getting an error on T.

Try this: `x.For(typeof(IRepository<>)).Use(typeof(NHibernateRepository<>));` — Steven, Apr 16 '12 at 07:11

score 2 · Accepted Answer · answered Apr 16 '12 at 13:13

2

If you want to be able to map all closing types of IRepository<> to the corresponding closing type for NHibernateRepository<>, use:

x.For(typeof(IRepository<>)).Use(typeof(NHibernateRepository<>))

answered Apr 16 '12 at 13:13

Joshua Flanagan

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score 0 · Answer 2 · edited May 23 '17 at 11:56

0

This line is expecting a substitution for the generic parameter T:

x.For<IRepository<T>>().Use<NHibernateRepository<T>>();

That is, which type T will be stored in the repository? You've chosen the NHibernateRepository class as the implementation for IRepository, but haven't shown which internal class will be stored.

Alternatively, look at using non-generic IRepository, see here: Generic repository - IRepository<T> or IRepository

edited May 23 '17 at 11:56

Community

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answered Apr 15 '12 at 23:24

yamen

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both interface and implementations are generic, so i can use any model class. – DarthVader Apr 15 '12 at 23:26
You can absolutely, but you can't use a generic type where you have it in your code because it is undeclared in the class. Perhaps use IRepository without generics, or try dynamic as suggested by the other answers. – yamen Apr 15 '12 at 23:31

score 0 · Answer 3 · answered Apr 15 '12 at 23:24

0

Perhaps replace <T> with dynamic?

x.For<IRepository<dynamic>>().Use<NHibernateRepository<dynamic>>();

As for the second point, the Singleton / Service Locator pattern is a rather heated debate.

answered Apr 15 '12 at 23:24

Travis J

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score 0 · Answer 4 · edited Dec 10 '12 at 23:58

Have a look at this article. Basically, what you want to do is something like this:

public void ConfigureDependencies()
{
    ObjectFactory.Initialize(x => x.Scan(cfg =>
    {
        cfg.TheCallingAssembly();
        cfg.IncludeNamespaceContainingType<Logger>();
        cfg.ConnectImplementationsToTypesClosing(typeof(NHibernateRepository<>));
    }));
}

Regarding the ApplicationContext static class: if you really have a cross-cutting concern, then I see nothing really wrong with it.

Structuremap Configuration with generics

4 Answers4