/// <summary>
/// Will register a subscriber. Event will be recognized by "eventId" and will be attached to
/// obj
/// </summary>
/// <param name="eventId"></param>
/// <param name="obj"></param>
/// <param name="handler"></param>
public void Subscribe(string eventId, IStateObject obj, Delegate handler, out string eventSubscriptionId, bool isDynamic = false)
{
var result = String.Empty;
if (handler != null)
{
//get/created subscribed promises info
eventId = eventId.ToUpper();
var handlerSubscriptionId = UniqueIDGenerator.GetEventRelativeUniqueID(obj, eventId);
LazyBehaviours.AddDependent(obj, UniqueIDGenerator.EVENTPrefix + eventId);
var promisesInfo = PromisesInfo.CreateInstance(handlerSubscriptionId);
////subscribe handler
var eventMethodName = handler.Method.Name.ToUpper() + eventId;
eventSubscriptionId = UniqueIDGenerator.GetEventRelativeUniqueID(obj, eventMethodName);
LazyBehaviours.AddDependent(obj, UniqueIDGenerator.EVENTPrefix + eventMethodName);
promisesInfo.Add(eventMethodName);
if (isDynamic)
{
EventPromiseInfoForClient.CreateEventInstance(_stateManager, handler, obj, eventSubscriptionId, actionID: eventId);
}
else
{
EventPromiseInfo.CreateEventInstance(_stateManager, handler, obj, eventSubscriptionId);
}
#if DEBUG
Debug.Assert(_stateManager.GetObject(eventSubscriptionId) != null, "Event Subscription Failed", "Event for {0} on Object {1} failed", eventId, obj.UniqueID);
#endif
result = eventSubscriptionId;
}
eventSubscriptionId = result;
}
/// <summary>
/// Creates a reference table to an Object.
/// </summary>
/// <param name="valueObject"></param>
/// <returns></returns>
private ReferencesTable CreateObjectReferencesTable(IStateObject valueObject)
{
var new_relativeUid = UniqueIDGenerator.GetReferenceTableRelativeUniqueID(valueObject.UniqueID);
LazyBehaviours.AddDependent(valueObject, UniqueIDGenerator.REFTABLEPrefix);
ReferencesTable referencesTable = new ReferencesTable();
referencesTable.UniqueID = new_relativeUid;
referencesTable.IsReferencedObjectAnIDisposableDependencyControl = valueObject is IDisposableDependencyControl;
if (StateManager.AllBranchesAttached(valueObject))
{
//at this point we have a new pointer with an attached parent
//which means that it was born on the temp stateManager
//we cannot just do a switchunique ids because switching
//is only on the stateManager level
//we need to promote it from temp to StateManager
//to make sure that it will be persisted
_stateManager.AddNewAttachedObject(referencesTable);
}
else
{
//at this point we have a new pointer with an UNATTACHED parent
//which means both the parent and the pointer are on the temp stateManager
//we need to switchunique ids because
//they are at the stateManager level
//if the parent is promoted so will be the pointer
_stateManager.AddNewTemporaryObject(referencesTable);
}
return(referencesTable);
}
private static void ProcessStaticAdoption(IStateObject parent, IStateObject orphan)
{
//if (child is still orphan)
if (!StateManager.AllBranchesAttached(orphan))
{
//Get relative id for orphan
var orphanID = StateManager.Current.UniqueIDGenerator.GetOrphanUniqueID();
var newUniqueID = UniqueIDGenerator.GetRelativeUniqueID(parent, orphanID);
LazyBehaviours.AddDependent(parent, orphanID);
StateManager.Current.SwitchOrPromoteObject(orphan, newUniqueID, inAdoption: true);
}
}
private bool ProcessAdoption(IStateObject parent, IStateObject orphan)
{
if (!_promotedOrphans.Contains(orphan))
{
//Get relative id for orphan
var orphanID = _uniqueIdGenerator.GetOrphanUniqueID();
var newUniqueID = UniqueIDGenerator.GetRelativeUniqueID(parent, orphanID);
_stateManager.PromoteObject(orphan, newUniqueID, inAdoption: true);
LazyBehaviours.AddDependent(parent, orphanID);
_promotedOrphans.Add(orphan);
return(true);
}
return(false);
}
internal static EventPromiseInfo BuildContinuationInfo(StateManager stateManager, EventPromiseInfo promise, Delegate code, IStateObject parent = null, string promiseUniqueId = null, string actionID = "")
{
var instance = code.Target;
Type codePromiseType = instance != null?instance.GetType() : null;
string internalFieldsState = null;
//This variable holds the reference
//to the IStateObject that is closest to the promise.
//For example if we are referring to a method on a Form. The closest state object is a
//ViewModel. If the object is a DisplayClass, then we try to determine
//which was the closest IModel or IUserControl where this DisplayClass was used
IStateObject objectContainingMethod = null;
if (codePromiseType != null)
{
//For special classes it's required to register a surrogate to save the application state.
if (TypeCacheUtils.IsSpecialClass(codePromiseType))
{
PromiseUtils.RegisterSurrogateForDisplayClass(codePromiseType, code.Target);
objectContainingMethod = stateManager.surrogateManager.GetSurrogateFor(code.Target, generateIfNotFound: true);
}
else
{
var stateObject = instance as IStateObject;
if (stateObject != null)
{
objectContainingMethod = stateObject;
}
else
{
var logicView = instance as ILogicView <IViewModel>;
if (logicView != null)
{
objectContainingMethod = logicView.ViewModel;
}
}
}
}
string methodArgs = null;
var parameters = code.Method.GetParameters();
if (parameters.Length > 0)
{
StringBuilder builder = new StringBuilder();
foreach (var parameter in parameters)
{
builder.Append(parameter.ParameterType.AssemblyQualifiedNameCache());
builder.Append("|");
}
methodArgs = builder.ToString();
}
promise.DeclaringType = code.Method.DeclaringType.AssemblyQualifiedNameCache();
//promise.SetObjectContainingMethod(objectContainingMethod);
promise.TargetType = code.Target != null?code.Target.GetType().AssemblyQualifiedNameCache() : null;
promise.MethodName = code.Method.Name;
promise.ActionID = actionID;
promise.ParentId = parent != null ? parent.UniqueID :
promise.ModalUniqueId = null;
promise.MethodArgs = methodArgs;
promise.UniqueID = promiseUniqueId ??
(parent == null
? stateManager.UniqueIDGenerator.GetPromiseUniqueID()
: stateManager.UniqueIDGenerator.GetRelativeUniqueID(parent));
promise.ContinuationFields = internalFieldsState;
promise.DelegateType =
TypeCacheUtils.GetDelegateTypeBasedOnMethodParameters(code.Method).AssemblyQualifiedNameCache();
stateManager.AddNewObject(promise);
if (objectContainingMethod != null)
{
if (!StateManager.AllBranchesAttached(objectContainingMethod))
{
stateManager.AdoptionInformation.RegisterPossibleOrphan(promise, objectContainingMethod);
}
var referenceToObjectContainingMethod = new StateObjectPointerReference();
var relativeUid = UniqueIDGenerator.GetPointerRelativeUniqueID(promise, "PO");
LazyBehaviours.AddDependent(promise, UniqueIDGenerator.REFERENCEPrefix + "PO");
StateObjectPointer.AssignUniqueIdToPointer(promise, relativeUid, referenceToObjectContainingMethod);
referenceToObjectContainingMethod.Target = objectContainingMethod;
stateManager.isServerSideOnly.Add(referenceToObjectContainingMethod);
stateManager.AddNewObject(referenceToObjectContainingMethod);
stateManager.ReferencesManager.AddReference(referenceToObjectContainingMethod, objectContainingMethod);
var surrogate = objectContainingMethod as StateObjectSurrogate;
if (surrogate != null)
{
stateManager.surrogateManager.AddSurrogateReference(surrogate, referenceToObjectContainingMethod);
}
promise.SetObjectContainingMethod(referenceToObjectContainingMethod);
}
if (parent != null && objectContainingMethod != null && parent.Equals(objectContainingMethod))
{
promise.isLocalInstance = true;
}
else
if (promiseUniqueId != null && objectContainingMethod != null)
{
var parentUniqueID = StateManager.GetLastPartOfUniqueID(promise);
promise.isLocalInstance = string.Equals(parentUniqueID, objectContainingMethod.UniqueID);
}
return(promise);
}
