Unity auto-factory with params

Question

I'm trying to figure out the correct way to inject an auto-factory which takes params, or even if this is possible with Unity.

For example I know I can do this:

public class TestLog
{
     private Func<ILog> logFactory;

     public TestLog(Func<ILog> logFactory)
     {
          this.logFactory = logFactory;
     }
     public ILog CreateLog()
     {
         return logFactory();
     }
}

Container.RegisterType<ILog, Log>();
TestLog test = Container.Resolve<TestLog>();
ILog log = test.CreateLog();

Now what I'll like to be able to do is:

public class TestLog
{
     private Func<string, ILog> logFactory;

     public TestLog(Func<string, ILog> logFactory)
     {
          this.logFactory = logFactory;
     }
     public ILog CreateLog(string name)
     {
         return logFactory(name);
     }
}

Container.RegisterType<ILog, Log>();
TestLog test = Container.Resolve<TestLog>();
ILog log = test.CreateLog("Test Name");

Unfortunately this doesn't work. I can see how you can set up custom factories for creating instances in Unity, just can't seem to fund any clear examples for this example.

Obviously I could create my own factory but I'm looking for an elegant way to do this in Unity and with minimum code.

Answer 1

Sorry to be one of those annoying people who answer their own questions but I figured it out.

public class TestLog
{
    private Func<string, ILog> logFactory;

    public TestLog(Func<string, ILog> logFactory)
    {
         this.logFactory = logFactory;
    }
    public ILog CreateLog(string name)
    {
        return logFactory(name);
    }
}

Container.RegisterType<Func<string, ILog>>(
     new InjectionFactory(c => 
        new Func<string, ILog>(name => new Log(name))
     ));

TestLog test = Container.Resolve<TestLog>();
ILog log = test.CreateLog("Test Name");

Answer 2

The answer by @TheCodeKing works fine, but in most (possibly all?) cases could be shortened to the following:

Container.RegisterInstance<Func<string, ILog>>(name => new Log(name));

(note that I'm using RegisterInstance() instead of RegisterType())

Since the Func<> implementation is already a kind of factory there's usually no need to wrap it in a InjectionFactory. It only ensures that each resolution of the Func<string, ILog> is a new instance, and I can't really think of a scenario that requires this.