public IObjRef[][] ExtractRelations(IEntityMetaData metaData, Object obj, IList <Object> relationValues)
{
RelationMember[] relationMembers = metaData.RelationMembers;
if (relationMembers.Length == 0)
{
return(ObjRef.EMPTY_ARRAY_ARRAY);
}
IValueHolderContainer vhc = (IValueHolderContainer)obj;
IObjRef[][] relations = new IObjRef[relationMembers.Length][];
IObjRefHelper objRefHelper = this.ObjRefHelper;
for (int relationIndex = relationMembers.Length; relationIndex-- > 0;)
{
RelationMember relationMember = relationMembers[relationIndex];
if (ValueHolderState.INIT != vhc.Get__State(relationIndex))
{
relations[relationIndex] = vhc.Get__ObjRefs(relationIndex);
continue;
}
Object relationValue = relationMember.GetValue(obj, false);
if (relationValue == null)
{
relations[relationIndex] = ObjRef.EMPTY_ARRAY;
continue;
}
IList <IObjRef> oris = objRefHelper.ExtractObjRefList(relationValue, null);
relations[relationIndex] = oris != null?ListUtil.ToArray <IObjRef>(oris) : null;
if (relationValues != null)
{
relationValues.Add(relationValue);
}
}
return(relations);
}
protected void EnsureInitializedRelationsIntern3(Object obj, PrefetchPath[] cachePaths, ILinkedMap <Type, PrefetchPath[]> entityTypeToPrefetchPaths,
IMap <ICacheIntern, IISet <IObjRef> > cacheToOrisToLoad, IMap <ICacheIntern, IMap <IObjRelation, bool> > cacheToOrelsToLoad,
IMap <ICacheIntern, IISet <IObjRef> > cacheToOrisLoadedHistory, IMap <ICacheIntern, IISet <IObjRelation> > cacheToOrelsLoadedHistory,
AlreadyHandledSet alreadyHandledSet, IList <PrefetchCommand> cascadeLoadItems)
{
if (obj == null)
{
return;
}
if (!alreadyHandledSet.PutIfNotExists(obj, cachePaths, true))
{
return;
}
if (obj is IndirectValueHolderRef)
{
IndirectValueHolderRef vhk = (IndirectValueHolderRef)obj;
HandleValueHolder(vhk, cachePaths, cacheToOrisToLoad, cacheToOrelsToLoad, cacheToOrisLoadedHistory, cacheToOrelsLoadedHistory,
alreadyHandledSet, cascadeLoadItems);
// Do nothing because this is only to prefetch RootCache entries
return;
}
else if (obj is DirectValueHolderRef)
{
DirectValueHolderRef vhk = (DirectValueHolderRef)obj;
if (!HandleValueHolder(vhk, cachePaths, cacheToOrisToLoad, cacheToOrelsToLoad, cacheToOrisLoadedHistory, cacheToOrelsLoadedHistory,
alreadyHandledSet, cascadeLoadItems))
{
return;
}
// force valueholder init. at this point we know that all related items are already in the cache. there will be no roundtrip
// to the server
if (vhk.Member == null)
{
obj = vhk.Vhc;
}
else
{
obj = vhk.Member.GetValue(vhk.Vhc);
}
}
if (obj == null)
{
// this check is necessary because even if we create only instances of DirectValueHolderRef in cases where there is a not initalized relation
// even then it might be possible that a concurrent thread initializes the valueholder to null (e.g. an empty to-one relation)
return;
}
if ((cachePaths == null || cachePaths.Length == 0) && entityTypeToPrefetchPaths == null)
{
return;
}
if (obj is IEnumerable)
{
var items = new List <Object>();
foreach (Object item in (IEnumerable)obj)
{
if (item == null)
{
continue;
}
items.Add(item);
}
foreach (Object item in items)
{
EnsureInitializedRelationsIntern3(item, cachePaths, entityTypeToPrefetchPaths, cacheToOrisToLoad, cacheToOrelsToLoad,
cacheToOrisLoadedHistory, cacheToOrelsLoadedHistory, alreadyHandledSet, cascadeLoadItems);
}
return;
}
IEntityMetaData metaData = ((IEntityMetaDataHolder)obj).Get__EntityMetaData();
if (cachePaths == null || cachePaths.Length == 0)
{
if (entityTypeToPrefetchPaths != null)
{
cachePaths = entityTypeToPrefetchPaths.Get(metaData.EntityType);
}
if (cachePaths == null || cachePaths.Length == 0)
{
return;
}
}
RelationMember[] relationMembers = metaData.RelationMembers;
if (relationMembers.Length == 0)
{
return;
}
IValueHolderContainer vhc = (IValueHolderContainer)obj;
for (int a = cachePaths.Length; a-- > 0;)
{
PrefetchPath path = cachePaths[a];
int relationIndex = path.memberIndex;
RelationMember member = relationMembers[relationIndex];
if (ValueHolderState.INIT != vhc.Get__State(relationIndex))
{
DirectValueHolderRef vhk = new DirectValueHolderRef(vhc, member);
EnsureInitializedRelationsIntern3(vhk, path.children, entityTypeToPrefetchPaths, cacheToOrisToLoad, cacheToOrelsToLoad, cacheToOrisLoadedHistory,
cacheToOrelsLoadedHistory, alreadyHandledSet, cascadeLoadItems);
continue;
}
Object memberValue = member.GetValue(obj);
if (memberValue == null)
{
continue;
}
EnsureInitializedRelationsIntern3(memberValue, path.children, entityTypeToPrefetchPaths, cacheToOrisToLoad, cacheToOrelsToLoad,
cacheToOrisLoadedHistory, cacheToOrelsLoadedHistory, alreadyHandledSet, cascadeLoadItems);
}
}
protected bool HandleValueHolder(DirectValueHolderRef vhr, PrefetchPath[] cachePaths, IMap <ICacheIntern, IISet <IObjRef> > cacheToOrisToLoad,
IMap <ICacheIntern, IMap <IObjRelation, bool> > cacheToOrelsToLoad, IMap <ICacheIntern, IISet <IObjRef> > cacheToOrisLoadedHistory,
IMap <ICacheIntern, IISet <IObjRelation> > cacheToOrelsLoadedHistory, AlreadyHandledSet alreadyHandledSet, IList <PrefetchCommand> cascadeLoadItems)
{
RelationMember member = vhr.Member;
bool newOriToLoad = false;
if (vhr is IndirectValueHolderRef)
{
RootCacheValue rcv = (RootCacheValue)vhr.Vhc;
ICacheIntern rootCache = ((IndirectValueHolderRef)vhr).RootCache;
IEntityMetaData metaData = EntityMetaDataProvider.GetMetaData(rcv.EntityType);
int relationIndex = metaData.GetIndexByRelation(member);
IObjRef[] rcvObjRefs = rcv.GetRelation(relationIndex);
if (rcvObjRefs == null)
{
IObjRelation self = ValueHolderContainerMixin.GetSelf(rcv, member.Name);
ISet <IObjRelation> orelsLoadedHistory = cacheToOrelsLoadedHistory.Get(rootCache);
if (orelsLoadedHistory == null || !orelsLoadedHistory.Contains(self))
{
IMap <IObjRelation, bool> orelsToLoad = cacheToOrelsToLoad.Get(rootCache);
if (orelsToLoad == null)
{
orelsToLoad = new HashMap <IObjRelation, bool>();
cacheToOrelsToLoad.Put(rootCache, orelsToLoad);
}
orelsToLoad.Put(self, vhr.ObjRefsOnly);
AddCascadeLoadItem(vhr, cachePaths, cascadeLoadItems);
}
return(false);
}
else if (!vhr.ObjRefsOnly && rcvObjRefs.Length > 0)
{
ISet <IObjRef> orisLoadedHistory = cacheToOrisLoadedHistory.Get(rootCache);
for (int b = rcvObjRefs.Length; b-- > 0;)
{
IObjRef ori = rcvObjRefs[b];
if (orisLoadedHistory != null && orisLoadedHistory.Contains(ori))
{
// Object has been tried to load before but it is obviously not in the cache
// So the load must have been failed somehow. It is assumed that the entity
// is not persisted in the database anymore (deleted before) so the ORI is illegal.
// We cleanup the ValueHolder so that future calls will not lead to
// another unnecessary roundtrip to the server
rcvObjRefs[b] = null;
continue;
}
IISet <IObjRef> orisToLoad = cacheToOrisToLoad.Get(rootCache);
if (orisToLoad == null)
{
orisToLoad = new CHashSet <IObjRef>();
cacheToOrisToLoad.Put(rootCache, orisToLoad);
}
orisToLoad.Add(ori);
newOriToLoad = true;
}
if (newOriToLoad)
{
AddCascadeLoadItem(vhr, cachePaths, cascadeLoadItems);
}
}
return(false);
}
IValueHolderContainer vhc = (IValueHolderContainer)vhr.Vhc;
int relationIndex2 = vhc.Get__EntityMetaData().GetIndexByRelationName(member.Name);
if (ValueHolderState.INIT == vhc.Get__State(relationIndex2))
{
return(true);
}
ICacheIntern cache = vhc.__TargetCache;
IObjRef[] objRefs = vhc.Get__ObjRefs(relationIndex2);
if (objRefs == null)
{
IObjRelation self = vhc.Get__Self(relationIndex2);
List <IObjRelation> orels = new List <IObjRelation>();
orels.Add(self);
IList <IObjRelationResult> orelResults = cache.GetObjRelations(orels, cache, failEarlyReturnMisses);
IObjRelationResult orelResult = orelResults[0];
if (orelResult == null)
{
ISet <IObjRelation> orelsLoadedHistory = cacheToOrelsLoadedHistory.Get(cache);
if (orelsLoadedHistory == null || !orelsLoadedHistory.Contains(self))
{
IMap <IObjRelation, bool> orelsToLoad = cacheToOrelsToLoad.Get(cache);
if (orelsToLoad == null)
{
orelsToLoad = new HashMap <IObjRelation, bool>();
cacheToOrelsToLoad.Put(cache, orelsToLoad);
}
orelsToLoad.Put(self, vhr.ObjRefsOnly);
AddCascadeLoadItem(vhr, cachePaths, cascadeLoadItems);
}
return(false);
}
objRefs = orelResult.Relations;
if (objRefs != null)
{
vhc.Set__ObjRefs(relationIndex2, objRefs);
}
}
if (!vhr.ObjRefsOnly && objRefs != null && objRefs.Length > 0)
{
IList <Object> loadedObjects = cache.GetObjects(new List <IObjRef>(objRefs), cache, failEarlyReturnMisses);
try
{
for (int b = objRefs.Length; b-- > 0;)
{
IObjRef ori = objRefs[b];
Object loadedObject = loadedObjects[b];
if (loadedObject != null)
{
continue;
}
ISet <IObjRef> orisLoadedHistory = cacheToOrisLoadedHistory.Get(cache);
if (orisLoadedHistory != null && orisLoadedHistory.Contains(ori))
{
// Object has been tried to load before but it is obviously not in the cache
// So the load must have been failed somehow. It is assumed that the entity
// is not persisted in the database anymore (deleted before) so the ORI is illegal.
// We cleanup the ValueHolder so that future calls will not lead to
// another unnecessary roundtrip to the server
objRefs[b] = null;
continue;
}
IISet <IObjRef> orisToLoad = cacheToOrisToLoad.Get(cache);
if (orisToLoad == null)
{
orisToLoad = new CHashSet <IObjRef>();
cacheToOrisToLoad.Put(cache, orisToLoad);
}
orisToLoad.Add(ori);
newOriToLoad = true;
}
}
finally
{
loadedObjects.Clear();
loadedObjects = null;
}
}
if (objRefs == null || newOriToLoad)
{
AddCascadeLoadItem(vhr, cachePaths, cascadeLoadItems);
return(false);
}
return(true);
}
protected void HandleValueHolderContainer(IValueHolderContainer vhc, RelationMember[] relationMembers, IObjRef[][] relations)
{
ICacheHelper cacheHelper = this.CacheHelper;
ICacheIntern parent = this.Parent;
IProxyHelper proxyHelper = this.ProxyHelper;
for (int relationIndex = relationMembers.Length; relationIndex-- > 0;)
{
RelationMember relationMember = relationMembers[relationIndex];
IObjRef[] relationsOfMember = relations[relationIndex];
if (!CascadeLoadMode.EAGER.Equals(relationMember.CascadeLoadMode))
{
if (ValueHolderState.INIT != vhc.Get__State(relationIndex))
{
// Update ObjRef information within the entity and do nothing else
vhc.Set__ObjRefs(relationIndex, relationsOfMember);
continue;
}
}
// We can safely access to relation if we want to
if (relationsOfMember == null)
{
// Reset value holder state because we do not know the content currently
vhc.Set__Uninitialized(relationIndex, null);
continue;
}
Object relationValue = relationMember.GetValue(vhc);
if (relationsOfMember.Length == 0)
{
if (!relationMember.IsToMany)
{
if (relationValue != null)
{
// Relation has to be flushed
relationMember.SetValue(vhc, null);
}
}
else
{
if (relationValue != null)
{
// Reuse existing collection
ListUtil.ClearList(relationValue);
}
else
{
// We have to create a new empty collection
relationValue = cacheHelper.CreateInstanceOfTargetExpectedType(relationMember.RealType, relationMember.ElementType);
relationMember.SetValue(vhc, relationValue);
}
}
continue;
}
// So we know the new content (which is not empty) and we know that the current content is already initialized
// Now we have to refresh the current content eagerly
// load entities as if we were an "eager valueholder" here
IList <Object> potentialNewItems = parent.GetObjects(new List <IObjRef>(relationsOfMember), this, CacheDirective.None);
if (OverwriteToManyRelations)
{
Object newRelationValue = cacheHelper.ConvertResultListToExpectedType(potentialNewItems, relationMember.RealType,
relationMember.ElementType);
// Set new to-many-relation, even if there has not changed anything in its item content
relationMember.SetValue(vhc, newRelationValue);
continue;
}
IList <Object> relationItems = ListUtil.AnyToList(relationValue);
bool diff = (relationItems.Count != potentialNewItems.Count);
if (!diff)
{
for (int b = potentialNewItems.Count; b-- > 0;)
{
if (!Object.ReferenceEquals(potentialNewItems[b], relationItems[b]))
{
diff = true;
break;
}
}
}
if (!diff)
{
// Nothing to do
continue;
}
if (relationValue != null && relationMember.IsToMany)
{
// Reuse existing collection
ListUtil.ClearAndFillList(relationValue, relationItems);
}
else
{
// We have to create a new empty collection or replace the to-one value
Object newRelationValue = cacheHelper.ConvertResultListToExpectedType(potentialNewItems, relationMember.RealType,
relationMember.ElementType);
relationMember.SetValue(vhc, newRelationValue);
}
}
}