protected virtual void RegisterInternal(OperationType operation, [NotNull] object target,
[NotNull] IOperationCallback callback, [NotNull] IDataContext context)
{
CallbackDictionary callbacks;
var viewModel = target as IViewModel;
if (viewModel != null && callback.IsSerializable)
{
lock (_locker)
{
if (!viewModel.Settings.State.TryGetData(CallbackConstant, out callbacks))
{
callbacks = new CallbackDictionary();
viewModel.Settings.State.Add(CallbackConstant, callbacks);
}
}
}
else
{
callbacks = ServiceProvider
.AttachedValueProvider
.GetOrAdd(target, CallbacksMember, (o, o1) => new CallbackDictionary(), null);
}
RegisterInternal(callbacks, operation.Id, callback);
}
private static void RegisterInternal(CallbackDictionary callbacks, string id, IOperationCallback callback)
{
//Only for debug callback
if (AlwaysSerializeCallback && callback.IsSerializable)
{
ISerializer serializer;
if (ServiceProvider.IocContainer.TryGet(out serializer))
{
var stream = serializer.Serialize(callback);
stream.Position = 0;
callback = (IOperationCallback)serializer.Deserialize(stream);
}
}
lock (callbacks)
{
List <object> list;
if (!callbacks.TryGetValue(id, out list))
{
list = new List <object>();
callbacks[id] = list;
}
list.Add(callback);
}
}
private static List <string> InvokeCallbacks <T>(CallbackDictionary dictionary, T target, Func <OperationType, object, IOperationResult> getResult, Action <T> clearDictAction)
{
List <string> invoked = null;
KeyValuePair <string, List <object> >[] keyValuePairs;
lock (dictionary)
keyValuePairs = dictionary.ToArray();
foreach (var pair in keyValuePairs)
{
var op = new OperationType(pair.Key);
var result = getResult(op, target);
if (result == null)
{
continue;
}
List <IOperationCallback> list = null;
InitializeCallbacks(dictionary, op, ref list, target, clearDictAction);
if (list == null)
{
continue;
}
foreach (var callback in list)
{
callback.Invoke(result);
}
if (invoked == null)
{
invoked = new List <string>();
}
invoked.Add(pair.Key);
}
return(invoked);
}
private static void InitializeCallbacks <T>(CallbackDictionary dictionary, OperationType type, ref List <IOperationCallback> list, T target, Action <T> clearDictAction)
{
if (dictionary == null)
{
return;
}
List <object> value;
lock (dictionary)
{
if (dictionary.TryGetValue(type.Id, out value))
{
dictionary.Remove(type.Id);
}
if (dictionary.Count == 0)
{
clearDictAction(target);
}
}
if (value == null)
{
return;
}
if (list == null)
{
list = new List <IOperationCallback>();
}
lock (value)
list.AddRange(value.Cast <IOperationCallback>());
}
private void RegisterInternal(CallbackDictionary callbacks, string id, IOperationCallback callback)
{
//Only for debug
if (AlwaysSerializeCallback && callback.IsSerializable)
{
var stream = _serializer.Serialize(callback);
stream.Position = 0;
callback = (IOperationCallback)_serializer.Deserialize(stream);
}
List <object> list;
lock (callbacks)
{
if (!callbacks.TryGetValue(id, out list))
{
list = new List <object>();
callbacks[id] = list;
}
}
lock (list)
list.Add(callback);
}