Multiple Interface injection with castle windsor

Question

How can you get castle Windsor to choose the right implantation of a interface at run time when you have multiple implementations in the container.

For example lets

Answer 1

As David said, you can't, but IHandlerSelector will let you take control. Check out the tests to get an idea of how to use them: https://svn.castleproject.org/svn/castle/trunk/InversionOfControl/Castle.Windsor.Tests/HandlerSelectorsTestCase.cs

Basically, you would do something like:

public class WritenExamHandler : IHandlerSelector
    {
        public bool HasOpinionAbout(string key, Type service)
        {
            // Decision logic here
            return somethingThatWouldBeTrueToSelectWritenExam && service == typeof(IExamCalc);
        }

        public IHandler SelectHandler(string key, Type service, IHandler[] handlers)
        {
            return handlers.Where(handler => handler.ComponentModel.Implementation == typeof (WritenExam)).First();
        }
    }

and then you register it with:

container.Kernel.AddHandlerSelector(new WritenExamHandler());

This will allow you to easily deal with multi-tenency issues :)