private void InternalAttach(object item, bool needAttachRelations = true)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
Action <object> attachAction = (x) =>
{
var trackingEntry = GetTrackingEntry(x);
if (trackingEntry == null)
{
trackingEntry = new TrackingEntry()
{
Entity = x, EntryState = EntryState.Unchanged
};
}
trackingEntry.Entity = x;
_TrackingEntries[KeySelector(x)] = trackingEntry;
if (!trackingEntry.IsSubscribed)
{
lock (_lockObject)
{
if (!trackingEntry.IsSubscribed)
{
PopulateRelations(x);
SubscribeObjectChanges(x);
trackingEntry.IsSubscribed = true;
}
}
}
};
TraverseRelation(item, new List <object>(), attachAction, null, null, needAttachRelations, needAttachRelations);
}
private bool TryChangeState(TrackingEntry trackingEntity, EntryState newState)
{
if (trackingEntity == null)
{
throw new ArgumentNullException("trackingEntity");
}
var error = String.Format("Unable to change entity state from {0} -> {1}", trackingEntity.EntryState, newState);
bool throwError = false;
if (newState == EntryState.Modified)
{
switch (trackingEntity.EntryState)
{
case EntryState.Detached:
case EntryState.Unchanged:
trackingEntity.EntryState = EntryState.Modified;
break;
case EntryState.Added:
case EntryState.Deleted:
case EntryState.Modified:
break;
default:
throwError = true;
break;
}
}
else if (newState == EntryState.Added)
{
switch (trackingEntity.EntryState)
{
case EntryState.Detached:
case EntryState.Unchanged:
trackingEntity.EntryState = EntryState.Added;
break;
default:
throwError = true;
break;
}
}
else if (newState == EntryState.Deleted)
{
switch (trackingEntity.EntryState)
{
case EntryState.Unchanged:
case EntryState.Modified:
trackingEntity.EntryState = EntryState.Deleted;
break;
default:
throwError = true;
break;
}
}
else if (newState == EntryState.Unchanged)
{
trackingEntity.EntryState = EntryState.Unchanged;
}
if (throwError)
{
Debug.WriteLine(error);
// throw new InvalidOperationException(error);
}
return !throwError;
}
private void InternalAttach(object item, bool needAttachRelations = true)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
Action<object> attachAction = (x) =>
{
var trackingEntry = GetTrackingEntry(x);
if (trackingEntry == null)
{
trackingEntry = new TrackingEntry() { Entity = x, EntryState = EntryState.Unchanged };
}
trackingEntry.Entity = x;
_TrackingEntries[KeySelector(x)] = trackingEntry;
if (!trackingEntry.IsSubscribed)
{
lock (_lockObject)
{
if (!trackingEntry.IsSubscribed)
{
PopulateRelations(x);
SubscribeObjectChanges(x);
trackingEntry.IsSubscribed = true;
}
}
}
};
TraverseRelation(item, new List<object>(), attachAction, null, null, needAttachRelations, needAttachRelations);
}
private bool TryChangeState(TrackingEntry trackingEntity, EntryState newState)
{
if (trackingEntity == null)
{
throw new ArgumentNullException("trackingEntity");
}
var error = String.Format("Unable to change entity state from {0} -> {1}", trackingEntity.EntryState, newState);
bool throwError = false;
if (newState == EntryState.Modified)
{
switch (trackingEntity.EntryState)
{
case EntryState.Detached:
case EntryState.Unchanged:
trackingEntity.EntryState = EntryState.Modified;
break;
case EntryState.Added:
case EntryState.Deleted:
case EntryState.Modified:
break;
default:
throwError = true;
break;
}
}
else if (newState == EntryState.Added)
{
switch (trackingEntity.EntryState)
{
case EntryState.Detached:
case EntryState.Unchanged:
trackingEntity.EntryState = EntryState.Added;
break;
default:
throwError = true;
break;
}
}
else if (newState == EntryState.Deleted)
{
switch (trackingEntity.EntryState)
{
case EntryState.Unchanged:
case EntryState.Modified:
trackingEntity.EntryState = EntryState.Deleted;
break;
default:
throwError = true;
break;
}
}
else if (newState == EntryState.Unchanged)
{
trackingEntity.EntryState = EntryState.Unchanged;
}
if (throwError)
{
Debug.WriteLine(error);
// throw new InvalidOperationException(error);
}
return(!throwError);
}
