public static void Initialize()
{
if (_key == null)
{
_key = new SingletonKey();
}
}
/// <summary>
/// Unregisters a singleton instance of a type.
/// </summary>
/// <param name="Object">Singleton object instance.</param>
/// <param name="Arguments">Any constructor arguments associated with the object instance.</param>
/// <returns>If the instance was found and removed.</returns>
public static bool Unregister(object Object, params object[] Arguments)
{
SingletonKey Key = new SingletonKey(Object.GetType(), Arguments);
lock (instances)
{
return(instances.Remove(Key));
}
}
/// <summary>
/// Checks if a singleton type (with optional associated arguments) is registered.
/// </summary>
/// <param name="Type">Singleton type</param>
/// <param name="Arguments">Any constructor arguments associated with the type.</param>
/// <returns>If such a singleton type is registered.</returns>
public static bool IsRegistered(Type Type, params object[] Arguments)
{
SingletonKey Key = new SingletonKey(Type, Arguments);
lock (instances)
{
return(instances.ContainsKey(Key));
}
}
public static T Get <T>(object key, bool throwExceptionIfNotFind = false)
{
var res = Get(SingletonKey.GetKey <T>(key));
if (res != null)
{
return((T)res);
}
if (throwExceptionIfNotFind)
{
throw new KeyNotFoundException("No se ha encontrado el objecto de tipo '" + typeof(T).Name + " con la clave '" + (key ?? "null") + "'.");
}
return(default(T));
}
/// <summary>
/// Registers a singleton instance of a type.
/// </summary>
/// <param name="Object">Singleton objcet instance.</param>
/// <param name="Arguments">Any constructor arguments associated with the object instance.</param>
public static void Register(object Object, params object[] Arguments)
{
SingletonKey Key = new SingletonKey(Object.GetType(), Arguments);
lock (instances)
{
if (instances.ContainsKey(Key))
{
throw new InvalidOperationException("Singleton already registered.");
}
instances[Key] = Object;
}
}
private static void Add <T>(T objectInstance, SingletonKey key)
{
if (Instance.objects.ContainsKey(key))
{
throw new ArgumentException("No se puede agregar el objeto porque la combinación clave/tipo esta en uso");
}
Instance.objects.Add(key, objectInstance);
foreach (var sub in Instance.subscriptions)
{
if (sub.Type == ((object)objectInstance).GetType() && sub.Key == key)
{
sub.Invoke(default(T), objectInstance, SingletonAction.Add);
}
}
}
//public static bool Set(Type type, object key, object substitute) { return Set(SingletonKey.GetKey(type, key), substitute); }
private static bool Set <T>(SingletonKey key, T substitute)
{
if (Instance.objects.ContainsKey(key))
{
var previous = (T)Instance.objects[key];
Instance.objects[key] = substitute;
foreach (var sub in Instance.subscriptions)
{
if (sub.Type == substitute.GetType() && sub.Key == key)
{
sub.Invoke(previous, substitute, SingletonAction.Set);
}
}
return(true);
}
return(false);
}
/// <summary>
/// Returns an instance of the type <paramref name="Type"/>.
/// </summary>
/// <param name="Type">Type of objects to return.</param>
/// <param name="Arguments">Constructor arguments.</param>
/// <returns>Instance of <paramref name="Type"/>.</returns>
public object Instantiate(Type Type, params object[] Arguments)
{
SingletonKey Key = new SingletonKey(Type, Arguments);
lock (instances)
{
if (instances.TryGetValue(Key, out object Object))
{
return(Object);
}
Object = Activator.CreateInstance(Type, Arguments);
instances[Key] = Object;
return(Object);
}
}
private static bool Remove <T>(SingletonKey key)
{
if (!Instance.objects.ContainsKey(key))
{
return(false);
}
var obj = Instance.objects[key];
var res = Instance.objects.Remove(key);
if (!res)
{
return(false);
}
foreach (var sub in Instance.subscriptions.Where(sub => sub.Type == obj.GetType() && sub.Key == key))
{
sub.Invoke(obj, default(T), SingletonAction.Remove);
}
return(true);
}
/// <summary>
/// Returns an instance of the type <paramref name="Type"/>.
/// </summary>
/// <param name="ReturnNullIfFail">If null should be returned instead for throwing exceptions.</param>
/// <param name="Type">Type of objects to return.</param>
/// <param name="Arguments">Constructor arguments.</param>
/// <returns>Instance of <paramref name="Type"/>.</returns>
public object Instantiate(bool ReturnNullIfFail, Type Type, params object[] Arguments)
{
SingletonKey Key = new SingletonKey(Type, Arguments);
object Object;
lock (instances)
{
if (instances.TryGetValue(Key, out Object))
{
return(Object);
}
}
Object = Types.Create(ReturnNullIfFail, Type, Arguments);
if (Object is null)
{
return(null);
}
lock (instances)
{
if (instances.TryGetValue(Key, out object Object2))
{
if (Object is IDisposable Disposable)
{
Disposable.Dispose();
}
return(Object2);
}
instances[Key] = Object;
}
return(Object);
}
private static object Get(SingletonKey key)
{
return(Instance.objects.ContainsKey(key) ? Instance.objects[key] : null);
}
protected MySingleton(SingletonKey key) : base(key)
{
}
public static bool Set <T>(T substitute)
{
return(Set <T>(SingletonKey.GetKey <T>(), substitute));
}
protected Singleton(SingletonKey key)
{
}
public static bool Contains <T>()
{
return(Contains <T>(SingletonKey.GetKey <T>()));
}
private static bool Contains <T>(SingletonKey key)
{
return(Instance.objects.ContainsKey(key));
}
public static void Add <T>(T objectInstance, object key)
{
Add(objectInstance, SingletonKey.GetKey <T>(key));
}
public static void Add <T>() where T : new()
{
Add(new T(), SingletonKey.GetKey <T>());
}
private static void Subscribe <T>(Action <SingletonSubscriptionArgs <T> > changeAction, SingletonKey key, bool raiseAddIfAlreadyAdded = true)
{
Instance.subscriptions.Add(new SubscriptionItem {
Type = typeof(T), Key = key, Action = changeAction
});
if (raiseAddIfAlreadyAdded && Instance.objects.ContainsKey(key))
{
changeAction(new SingletonSubscriptionArgs <T>(default(T), (T)Instance.objects[key], SingletonAction.Add));
}
}
public static void Subscribe <T>(Action <SingletonSubscriptionArgs <T> > changeAction, object key, bool raiseAddIfAlreadyAdded = true)
{
Subscribe <T>(changeAction, SingletonKey.GetKey <T>(key));
}
public static bool Remove <T>(object key)
{
return(Remove <T>(SingletonKey.GetKey <T>(key)));
}
public static bool Set <T>(T substitute, object key)
{
return(Set <T>(SingletonKey.GetKey <T>(key), substitute));
}
public static bool Remove <T>()
{
return(Remove <T>(SingletonKey.GetKey <T>()));
}
public static bool Contains <T>(object key)
{
return(Contains <T>(SingletonKey.GetKey <T>(key)));
}
