/**
* Returns a pointer to the duplicate of a given object, creating the duplicate object if necessary.
*
* @param Object the object to find a duplicate for
*
* @return a pointer to the duplicate of the specified object
*/
UObject* FDuplicateDataWriter::GetDuplicatedObject(UObject* Object, bool bCreateIfMissing)
{
UObject* Result = NULL;
if (IsValid(Object))
{
// Check for an existing duplicate of the object.
FDuplicatedObject DupObjectInfo = DuplicatedObjectAnnotation.GetAnnotation( Object );
if( !DupObjectInfo.IsDefault() )
{
Result = DupObjectInfo.DuplicatedObject;
}
else if (bCreateIfMissing)
{
// Check to see if the object's outer is being duplicated.
UObject* DupOuter = GetDuplicatedObject(Object->GetOuter());
if(DupOuter != NULL)
{
// The object's outer is being duplicated, create a duplicate of this object.
UObject* NewEmptyDuplicate = StaticConstructObject_Internal(Object->GetClass(), DupOuter, Object->GetFName(),
ApplyFlags | Object->GetMaskedFlags(FlagMask),
ApplyInternalFlags | (Object->GetInternalFlags() & InternalFlagMask),
Object->GetArchetype(), true, InstanceGraph);
Result = AddDuplicate(Object, NewEmptyDuplicate);
}
}
}
return Result;
}
FArchive& FDuplicateDataReader::operator<<( UObject*& Object )
{
UObject* SourceObject = Object;
Serialize(&SourceObject,sizeof(UObject*));
FDuplicatedObject ObjectInfo = SourceObject ? DuplicatedObjectAnnotation.GetAnnotation(SourceObject) : FDuplicatedObject();
if( !ObjectInfo.IsDefault() )
{
Object = ObjectInfo.DuplicatedObject;
}
else
{
Object = SourceObject;
}
return *this;
}
/**
* Places a new duplicate in the DuplicatedObjects map as well as the UnserializedObjects list
*
* @param SourceObject the original version of the object
* @param DuplicateObject the copy of the object
*
* @return a pointer to the copy of the object
*/
UObject* FDuplicateDataWriter::AddDuplicate(UObject* SourceObject,UObject* DupObject)
{
if ( DupObject && !DupObject->IsTemplate() )
{
// Make sure the duplicated object is prepared to postload
DupObject->SetFlags(RF_NeedPostLoad|RF_NeedPostLoadSubobjects);
}
// Check for an existing duplicate of the object; if found, use that one instead of creating a new one.
FDuplicatedObject Info = DuplicatedObjectAnnotation.GetAnnotation( SourceObject );
if ( Info.IsDefault() )
{
DuplicatedObjectAnnotation.AddAnnotation( SourceObject, FDuplicatedObject( DupObject ) );
}
else
{
Info.DuplicatedObject = DupObject;
}
UnserializedObjects.Add(SourceObject);
return DupObject;
}
