protected void ApplyRelationUpdateItem(IObjRefContainer entity, IRelationUpdateItem rui, bool isUpdate,
IEntityMetaData metaData, IList <DirectValueHolderRef> toPrefetch, List <IObjRef> toFetchFromCache, bool checkBaseState,
IList <IBackgroundWorkerDelegate> runnables)
{
IObjRefHelper objRefHelper = this.ObjRefHelper;
String memberName = rui.MemberName;
int relationIndex = metaData.GetIndexByRelationName(memberName);
RelationMember relationMember = metaData.RelationMembers[relationIndex];
IObjRef[] existingORIs;
if (entity.Is__Initialized(relationIndex))
{
existingORIs = ListUtil.ToArray(ObjRefHelper.ExtractObjRefList(relationMember.GetValue(entity), null));
}
else
{
existingORIs = entity.Get__ObjRefs(relationIndex);
if (existingORIs == null)
{
toPrefetch.Add(new DirectValueHolderRef(entity, relationMember, true));
runnables.Add(new IBackgroundWorkerDelegate(delegate()
{
ApplyRelationUpdateItem(entity, rui, isUpdate, metaData, toPrefetch, toFetchFromCache, checkBaseState, runnables);
}));
return;
}
}
IObjRef[] addedORIs = rui.AddedORIs;
IObjRef[] removedORIs = rui.RemovedORIs;
IObjRef[] newORIs;
if (existingORIs.Length == 0)
{
if (checkBaseState && removedORIs != null)
{
throw new Exception("Removing from empty member");
}
newORIs = addedORIs != null ? (IObjRef[])addedORIs.Clone() : ObjRef.EMPTY_ARRAY;
for (int a = newORIs.Length; a-- > 0;)
{
newORIs[a] = CloneObjRef(newORIs[a], false);
}
}
else
{
// Set to efficiently remove entries
LinkedHashSet <IObjRef> existingORIsSet = new LinkedHashSet <IObjRef>(existingORIs);
if (removedORIs != null)
{
foreach (IObjRef removedORI in removedORIs)
{
IObjRef clonedObjRef = CloneObjRef(removedORI, false);
if (existingORIsSet.Remove(clonedObjRef) || !checkBaseState)
{
continue;
}
throw OptimisticLockUtil.ThrowModified(objRefHelper.EntityToObjRef(entity), null, entity);
}
}
if (addedORIs != null)
{
foreach (IObjRef addedORI in addedORIs)
{
IObjRef clonedObjRef = CloneObjRef(addedORI, false);
if (existingORIsSet.Add(clonedObjRef) || !checkBaseState)
{
continue;
}
throw OptimisticLockUtil.ThrowModified(objRefHelper.EntityToObjRef(entity), null, entity);
}
}
if (existingORIsSet.Count == 0)
{
newORIs = ObjRef.EMPTY_ARRAY;
}
else
{
newORIs = existingORIsSet.ToArray();
}
}
if (!entity.Is__Initialized(relationIndex))
{
entity.Set__ObjRefs(relationIndex, newORIs);
return;
}
toFetchFromCache.AddRange(newORIs);
runnables.Add(new IBackgroundWorkerDelegate(delegate()
{
ICache stateCache = cloneStateTL.Value.incrementalState.GetStateCache();
IList <Object> objects = stateCache.GetObjects(newORIs, CacheDirective.FailEarly);
Object value;
if (relationMember.IsToMany)
{
// To-many relation
Object coll = ListUtil.CreateObservableCollectionOfType(relationMember.RealType, objects.Count);
ListUtil.FillList(coll, objects);
value = coll;
}
else
{
// To-one relation
value = objects.Count > 0 ? objects[0] : null;
}
relationMember.SetValue(entity, value);
}));
}