private static void SerializeFields(StateManager stateManager, object instance, ref IStateObject viewModel, BinaryWriter writer, Type logicObjectType, IList <FieldInfo> fieldList, string fieldPrefix = "")
{
var formatter = new BinaryFormatter();
foreach (var field in fieldList)
{
#if DEBUG
Trace.WriteLine(string.Format("Serializing promise field {0}.{1}", fieldPrefix, field.Name));
#endif
var objValue = field.GetValue(instance);
if (objValue == null)
{
continue; //We do not need to save null fields
}
///The delegate can be an instance method. We are looking to determine if there is a reference to the "this instance"
if (IsThisTheThisField(stateManager, instance, field, logicObjectType, objValue, writer, fieldPrefix, ref viewModel))
{
continue;
}
if (field.Name.Contains("locals"))
{
var parentSurrogate = stateManager.surrogateManager.GetSurrogateFor(instance, generateIfNotFound: false);
if (parentSurrogate == null)
{
throw new InvalidOperationException("A parent surrogate is needed");
}
var localsSurrogate = stateManager.surrogateManager.GetSurrogateFor(objValue, generateIfNotFound: false);
if (localsSurrogate == null) //There was not a previous surrogate!! Ok we need a lastminute one
{
throw new Exception("Invalid condition. Surrogate dependency should have been reported previously");
//RegisterSurrogateForDisplayClass(field.FieldType, objValue,parentSurrogate.UniqueID);
//localsSurrogate = stateManager.surrogateManager.GetSurrogateFor(objValue, generateIfNotFound: true, parentSurrogate: parentSurrogate.UniqueID);
//stateManager.surrogateManager.AddSurrogateReference(localsSurrogate, parentSurrogate.UniqueID);
}
writer.Write(field.Name);
writer.Write(localsSurrogate.UniqueID);
continue;
}
//If we have a value we need to serialize
//We will write the fieldName + Value
bool isSerializable = false;
if (objValue is IStateObject || IsInterfaceThatMightBeAnStateObject(objValue))
{
//For IStateObject only the UniqueID is needed for the other we would use the ISerialize
var value = (IStateObject)objValue;
//If this field is not the this then we are goint to save its value
writer.Write(fieldPrefix + field.Name);
var orphanHolder = stateManager.AdoptionInformation.GetOrphanHolder(instance, value, field.Name);
if (orphanHolder == null)
{
writer.Write(value.UniqueID);
}
else
{
writer.Write(orphanHolder.UniqueID);
}
}
else if (objValue is ILogicWithViewModel <IStateObject> )
{
var value = (ILogicWithViewModel <IStateObject>)objValue;
Debug.Assert(value.ViewModel != null);
writer.Write(fieldPrefix + field.Name);
writer.Write(value.ViewModel.UniqueID);
}
else if ((isSerializable = (field.FieldType.IsSerializable || objValue.GetType().IsSerializable)) && objValue is MulticastDelegate)
{
SerializeDelegate(stateManager, instance, writer, fieldPrefix, field, objValue);
}
else if (SurrogatesDirectory.IsSurrogateRegistered(field.FieldType))
{
var surrogate = stateManager.surrogateManager.GetSurrogateFor(objValue, generateIfNotFound: true);
if (surrogate == null)
{
// Something is wrong here, throw an exception
throw new InvalidOperationException("Error getting the surrogate for field " + field.Name + " with type " + field.FieldType.FullName + " inside object of type " + instance.GetType().FullName);
}
var parentSurrogate = stateManager.surrogateManager.GetSurrogateFor(instance, generateIfNotFound: false);
stateManager.surrogateManager.AddSurrogateReference(surrogate, parentSurrogate);
writer.Write(field.Name);
writer.Write(surrogate.UniqueID);
}
else if (isSerializable)
{
writer.Write(fieldPrefix + field.Name);
formatter.Serialize(writer.BaseStream, objValue);
}
else
{
throw new NotSupportedException("Error serializing field " + field.Name + " with type " + field.FieldType.FullName + " inside object of type " + instance.GetType().FullName);
}
}
}
public IList <IStateObject[]> ExtractOrphansWithQualifiedParents()
{
List <IStateObject[]> result = new List <IStateObject[]>();
foreach (var orphan in orphanInformationTables.orphanToParentCandidates)
{
if (orphan.Key is IDependentViewModel)
{
var parentList = orphan.Value;
IStateObject firstNonVisualParentCandidate = null;;
IStateObject firstVisualParentCandidate = null;
foreach (var parent in parentList)
{
if (StateManager.AllBranchesAttached(parent))
{
if (parent is IModel || parent is IDependentModel || parent is IStateObjectSurrogate)
{
firstNonVisualParentCandidate = parent;
continue;
}
if (parent is IViewModel || parent is IDependentViewModel)
{
firstVisualParentCandidate = parent;
break;
}
}
}
if (firstVisualParentCandidate != null)
{
result.Add(new[] { orphan.Key, firstVisualParentCandidate });
}
else if (firstNonVisualParentCandidate != null)
{
result.Add(new[] { orphan.Key, firstNonVisualParentCandidate });
}
}
else
{
var parentList = orphan.Value;
foreach (var parent in parentList)
{
if (StateManager.AllBranchesAttached(parent))
{
result.Add(new[] { orphan.Key, parent });
break;
}
}
}
}
foreach (var pairs in result)
{
orphanInformationTables.orphanToParentCandidates.Remove(pairs[0]);
}
if (result.Count > 0)
{
//We sort this list to make sure that children adoptions occur before parent adoptions
result.Sort((x, y) => {
if (x == null)
{
return(-1);
}
if (y == null)
{
return(1);
}
return(CompareOrphans(x[0], y[0]));
});
}
return(result);
}
public static void StaticAdopt(IStateObject parent, IStateObject orphan)
{
var referencesManager = StateManager.Current.ReferencesManager;
//We will try to adopt the parent of an object if it has references, thats why first we need to calculate the parents with References.
var orphansStack = new List <IStateObject>();
//Candidates Stack.
var candidatesStack = new List <IStateObject>();
if (!StateManager.AllBranchesAttached(orphan))
{
//Let's try to calculate the posible parent of the orphan.
var orphanCandidate = referencesManager.GetCandidateForAdoption(orphan, isHandlingOrphans: true);
var isOphanCandidateAGoodCandidate = false;
var isParentAGoodCandidate = false;
if (orphanCandidate is IViewModel || orphanCandidate is IDependentViewModel)
{
isOphanCandidateAGoodCandidate = true;
}
if (parent is IViewModel || parent is IDependentViewModel)
{
isParentAGoodCandidate = true;
}
//The first and maybe the only element in the Stack is the Orphan, but
//only if has a valid adoption candidate.
if (orphanCandidate != null)
{
orphansStack.Add(orphan);
//We will always prefer the candidate coming from the ReferencesManager
if (isOphanCandidateAGoodCandidate)
{
candidatesStack.Add(orphanCandidate);
}
//If neither both possible candidates is not a good candidates, we will also prefer the one coming from the references manager.
else if (!isParentAGoodCandidate && !isOphanCandidateAGoodCandidate)
{
candidatesStack.Add(orphanCandidate);
}
//This is the lowest preference
else
{
candidatesStack.Add(parent);
}
}
else
//The adoption won't continue because the orphan doesn't have any valid candidate for adoption.
{
ProcessStaticAdoption(parent, orphan);
return;
}
var orphanParent = StateManager.Current.GetParentEx(orphan);
while (orphanParent != null)
{
//If the parent has References, then we add it to the orphans Stack.
if (referencesManager.HasReferences(orphanParent))
{
var parentCandidate = referencesManager.GetCandidateForAdoption(orphanParent);
if (parentCandidate != null)
{
orphansStack.Add(orphanParent);
candidatesStack.Add(parentCandidate);
}
}
orphanParent = StateManager.Current.GetParentEx(orphanParent);
}
//From the candidates in the Tree let's get the best one.
IStateObject currCandidate = candidatesStack[candidatesStack.Count - 1];
//for (int i = candidatesStack.Count - 1; i >= 0; i--)
//{
// //Only if the paren't element is not visual let's try to find a better candidate.
// if (candidatesStack[i] is IViewModel || candidatesStack[i] is IDependentViewModel)
// {
// currCandidate = candidatesStack[i];
// break;
// }
//}
var orphanToAdopt = orphansStack[orphansStack.Count - 1];
ProcessStaticAdoption(currCandidate, orphanToAdopt);
}
}
private void Adopt(IStateObject parent, IStateObject orphan)
{
var referencesManager = _stateManager.ReferencesManager;
//We will try to adopt the parent of an object if it has references, thats why first we need to calculate the parents with References.
var orphansStack = new List <IStateObject>();
//Candidates Stack.
var candidatesStack = new List <IStateObject>();
if (!StateManager.AllBranchesAttached(orphan))
{
//Let's try to calculate the posible parent of the orphan.
var orphanCandidate = referencesManager.GetCandidateForAdoption(orphan, isHandlingOrphans: true);
var isOphanCandidateAGoodCandidate = false;
var isParentAGoodCandidate = false;
if (orphanCandidate is IViewModel || orphanCandidate is IDependentViewModel)
{
isOphanCandidateAGoodCandidate = true;
}
if (parent is IViewModel || parent is IDependentViewModel)
{
isParentAGoodCandidate = true;
}
//The first and maybe the only element in the Stack is the Orphan, but
//only if has a valid adoption candidate.
if (orphanCandidate != null)
{
orphansStack.Add(orphan);
//We will always prefer the candidate coming from the ReferencesManager
if (isOphanCandidateAGoodCandidate)
{
candidatesStack.Add(orphanCandidate);
}
//If neither both possible candidates is not a good candidates, we will also prefer the one coming from the references manager.
else if (!isParentAGoodCandidate && !isOphanCandidateAGoodCandidate)
{
candidatesStack.Add(orphanCandidate);
}
//This is the lowest preference
else
{
candidatesStack.Add(parent);
}
}
else
//The adoption won't continue because the orphan doesn't have any valid candidate for adoption.
{
ProcessAdoption(parent, orphan);
return;
}
IStateObject orphanParent;
var orphanParentIterator = orphanParent = _stateManager.GetParentEx(orphan);
HashSet <IStateObject> visitedParents = new HashSet <IStateObject>();
//Cyclyc referernces are causing infinite loops.
while (orphanParentIterator != null && !visitedParents.Contains(orphanParentIterator))
{
//If the parent has References, then we add it to the orphans Stack.
if (referencesManager.HasReferences(orphanParentIterator))
{
var parentCandidate = referencesManager.GetCandidateForAdoption(orphanParentIterator, isHandlingOrphans: true);
if (parentCandidate != null)
{
orphansStack.Add(orphanParentIterator);
candidatesStack.Add(parentCandidate);
}
}
visitedParents.Add(orphanParentIterator);
orphanParentIterator = _stateManager.GetParentEx(orphanParentIterator);
}
//From the candidates in the Tree let's get the best one.
IStateObject currCandidate = candidatesStack[candidatesStack.Count - 1];
var orphanToAdopt = orphansStack[orphansStack.Count - 1];
ProcessAdoption(currCandidate, orphanToAdopt);
}
}
public int Compare(OrphanInfoEntry x, OrphanInfoEntry y)
{
var xUid = x.Parent.UniqueID;
var yUid = y.Parent.UniqueID;
if (StateManager.IsAttached(x.Parent))
{
if (StateManager.IsAttached(y.Parent))
{
if (x.Godparent == null && y.Godparent == null)
{
if (xUid.Length > yUid.Length)
{
return(1);
}
if (xUid.Length < yUid.Length)
{
return(-1);
}
return(0);
}
if (x.Godparent == null)
{
return(-1);
}
if (y.Godparent == null)
{
return(1);
}
if (x.Godparent.UniqueID.Length > y.Godparent.UniqueID.Length)
{
return(1);
}
if (x.Godparent.UniqueID.Length < y.Godparent.UniqueID.Length)
{
return(-1);
}
return(0);
}
return(-1);
}
if (!StateManager.IsAttached(y.Parent))
{
if (x.Godparent == null)
{
return(1);
}
if (y.Godparent == null)
{
return(-1);
}
if (x.Godparent.UniqueID.Length > y.Godparent.UniqueID.Length)
{
return(1);
}
if (x.Godparent.UniqueID.Length < y.Godparent.UniqueID.Length)
{
return(-1);
}
return(0);
}
return(1);
}
private static void InitializeObject(StateManager stateManager, IIocContainer container, ILogic logic, object[] parameters, Type logicType, bool isRecoveredFromStorage, IIocContainerFlags flags)
{
var isNewLogic = true;
bool autoWired = false;
bool isNoView = false;
//Was this an ILogicView<T>
if (logic is ILogicView <IViewModel> )
{
IViewModel viewModel = null;
isNoView = (flags & IIocContainerFlags.NoView) == IIocContainerFlags.NoView;
//Do we need to create a view for this logic object???
if (isNoView)
{
isNewLogic = false;
}
else
{
PropertyInfo viewModelProp = logicType.Property("ViewModel"); //This type is fix but arbitrary
//Is there a view parameter? it should be the first one. If not we will consider that is a constructor parameter
if (parameters != null && parameters.Length > 0 && parameters[0] is IViewModel)
{
viewModel = (IViewModel)parameters[0];
//In case we are providing aditional parameter it determines if the logic instance is new
//this case can't be determine within the this method so it needs to be passed as an aditional value in the parameters
isNewLogic = parameters.Length > 1 ? (bool)parameters[1] : false;
}
else
{ //Ok. We still dont have a view so we need to create one. We require the property to get the actual PropertyType of the logic
viewModel = (IViewModel)container.Resolve(viewModelProp.PropertyType);
try
{
ViewManager.Instance.Events.Suspend();
viewModel.Build(container);
}
finally
{
ViewManager.Instance.Events.Resume();
}
}
viewModelProp.SetValue(logic, viewModel, null);
if (!isRecoveredFromStorage)
{
autoWired = true;
ViewManager.Instance.Events.AutoWireEvents(logic);
}
}
}
// lets inject the container
if (logic is ICreatesObjects)
{
((ICreatesObjects)logic).Container = container;
}
if (logic is IInteractsWithView)
{
((IInteractsWithView)logic).ViewManager = ViewManager.Instance;
}
if (!isRecoveredFromStorage)
{
// lets inject all IViewModel properties
if (logic is IStateObject)
{
InitializeObject(stateManager, container, (IStateObject)logic, parameters, logicType, flags);
//Only Visual objects need autowire.
if (!autoWired && logic is IDependentViewModel)
{
ViewManager.Instance.Events.AutoWireEvents(logic);
}
}
if (isNewLogic)
{
if ((flags & IIocContainerFlags.ExtraLean) != IIocContainerFlags.ExtraLean)
{
InitializationHelpers.CallInitializeCommon(logic, logicType);
}
//First we check to avoid unnecessary calls to GetInitMethod
if (logic is IInitializable && !isRecoveredFromStorage && !isNoView && ((flags & IIocContainerFlags.Lean) != IIocContainerFlags.Lean))
{
//Get Init must be done on the instance type, because logicType might refer to an interface
InitializationHelpers.CallInitMethod((IInitializable)logic, parameters);
}
}
}
else
{
var dict = logic as IObservableDictionaryEntries;
if (dict != null)
{
dict.Initialize(stateManager, stateManager.ReferencesManager, stateManager.surrogateManager);
}
}
}
