/// <summary>
/// Resolves the last registered service with a matching name.
/// </summary>
/// <typeparam name="TInterface"></typeparam>
/// <param name="name"></param>
/// <returns></returns>
public TInterface Resolve <TInterface>(string name)
{
var interfaceType = typeof(TInterface);
var typeAndName = new TypeAndName(interfaceType, name);
Type type;
if (RegisteredTypes.TryGetValue(typeAndName, out type))
{
object lazyInstance;
if (StoredServices.TryGetValue(typeAndName, out lazyInstance) && lazyInstance.GetType() == typeof(Func <TInterface>))
{
// Lazy singletons must be invoked when called first time.
var invokedLazy = ((Func <TInterface>)lazyInstance).Invoke();
StoredServices.AddOrUpdate(typeAndName, k => invokedLazy, (k, v) => invokedLazy);
}
object instance;
if (StoredServices.TryGetValue(typeAndName, out instance))
{
// Return the stored singleton object.
return((TInterface)instance);
}
// Get the first constructor from the registered type.
var constructor = type.GetConstructors().First();
// Create a new instance and return it.
var activator = Common.Activator.GetActivator(constructor);
return((TInterface)activator());
}
return(default(TInterface));
}
/// <summary>
/// Registers an object as a singleton with a name. When Resolve is called,
/// the same object is returned.
/// </summary>
/// <param name="interfaceType"></param>
/// <param name="theObject"></param>
/// <param name="name"></param>
public void RegisterAsSingleton(Type interfaceType, object theObject, string name)
{
var typeAndName = new TypeAndName(interfaceType, name);
RegisterType(interfaceType, theObject.GetType(), name);
StoredServices.AddOrUpdate(typeAndName, k => theObject, (k, v) => theObject);
}
