public static object CreateDelegate(Type delegateType, NancyContainer nancyContainer, string serviceName)
{
var returnType = delegateType.FunctionReturnType();
var exps = new Expression[] {
Expression.Constant(serviceName),
Expression.Constant(returnType)
};
var container = Expression.Constant(nancyContainer);
var exp = Expression.Call(container, nancyContainer.GetMethod(nc => nc.Resolve(string.Empty, default(Type))), exps);
var expConvert = Expression.Convert(exp, returnType);
var g = Expression.Lambda(delegateType, expConvert).Compile();
return (object)g;
}
public IEnumerable<IRegistration> GetRegistrationsFor(NancyContainer container, Type serviceType)
{
if (serviceType != null && serviceType.IsGenericTypeDefinedBy(typeof(Func<>)))
{
var baseServiceType = serviceType.FunctionReturnType();
var baseServiceRegistrations = container.GetRegistrations(baseServiceType, null);
var newRegistrations = new List<IRegistration>();
foreach (var registration in baseServiceRegistrations)
{
var factory = FuncGenerator.CreateDelegate(serviceType, container, registration.Name);
newRegistrations.Add(new FactoryRegistration(serviceType, c => factory, registration.Name));
}
return newRegistrations.AsEnumerable();
}
return Enumerable.Empty<IRegistration>();
}
