void FLazyObjectPtr::PossiblySerializeObjectGuid(UObject *Object, FArchive& Ar)
{
if (Ar.IsSaving() || Ar.IsCountingMemory())
{
FUniqueObjectGuid Guid = GuidAnnotation.GetAnnotation(Object);
bool HasGuid = Guid.IsValid();
Ar << HasGuid;
if (HasGuid)
{
if (Ar.GetPortFlags() & PPF_DuplicateForPIE)
{
check(GPlayInEditorID != -1);
FGuid &FoundGuid = PIEGuidMap[GPlayInEditorID % MAX_PIE_INSTANCES].FindOrAdd(Guid.GetGuid());
if (!FoundGuid.IsValid())
{
Guid = FoundGuid = FGuid::NewGuid();
}
else
{
Guid = FoundGuid;
}
}
Ar << Guid;
}
}
else if (Ar.IsLoading())
{
bool HasGuid = false;
Ar << HasGuid;
if (HasGuid)
{
FUniqueObjectGuid Guid;
Ar << Guid;
// Don't try and resolve GUIDs when loading a package for diff'ing
const UPackage* Package = Object->GetOutermost();
const bool bLoadedForDiff = (Package && Package->HasAnyPackageFlags(PKG_ForDiffing));
if (!bLoadedForDiff && (!(Ar.GetPortFlags() & PPF_Duplicate) || (Ar.GetPortFlags() & PPF_DuplicateForPIE)))
{
check(!Guid.IsDefault());
UObject* OtherObject = Guid.ResolveObject();
if (OtherObject != Object) // on undo/redo, the object (potentially) already exists
{
if (OtherObject != NULL)
{
UE_CLOG(!((FApp::IsGame() || GIsPlayInEditorWorld) && Package && Package->ContainsMap()), LogUObjectGlobals, Warning, TEXT("Guid is in use by %s and %s, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE"), *OtherObject->GetFullName(), !!Object ? *Object->GetFullName() : TEXT("NULL"));
// This guid is in use, which should never happen in the editor but could happen at runtime with duplicate level loading or PIE. If so give it an invalid GUID and don't add to the annotation map.
Guid = FGuid();
}
else
{
GuidAnnotation.AddAnnotation(Object, Guid);
}
FUniqueObjectGuid::InvalidateTag();
}
}
}
}
}
FUniqueObjectGuid FUniqueObjectGuid::GetOrCreateIDForObject(const class UObject *Object)
{
check(Object);
FUniqueObjectGuid ObjectGuid(Object);
if (!ObjectGuid.IsValid())
{
ObjectGuid.Guid = FGuid::NewGuid();
GuidAnnotation.AddAnnotation(Object, ObjectGuid);
Object->MarkPackageDirty();
}
return ObjectGuid;
}
UObject *FUniqueObjectGuid::ResolveObject() const
{
return GuidAnnotation.Find(*this);
}
FUniqueObjectGuid::FUniqueObjectGuid(const class UObject* InObject)
: Guid(GuidAnnotation.GetAnnotation(InObject).Guid)
{
}
