void ExportMetadata()
{
int DelayExport = 2000; // milliseconds
int ExportBatchSize = 1000; // After each batch is exported, the process will wait for DelayExport and resume (unless cancelled)
int CurrentBatchSize = 0;
Func <FCachedDocumentData, bool> AddElements = (FCachedDocumentData CacheData) =>
{
while (CacheData.ElementsWithoutMetadata.Count > 0)
{
if (CurrentBatchSize == ExportBatchSize)
{
// Add some delay before exporting next batch.
CurrentBatchSize = 0;
// Send metadata to DirectLink.
DatasmithScene.BuildScene(SceneName);
DatasmithDirectLink.UpdateScene(DatasmithScene);
MetadataEvent.WaitOne(DelayExport);
}
if (MetadataCancelToken.IsCancellationRequested)
{
return(false);
}
var Entry = CacheData.ElementsWithoutMetadata.Dequeue();
// Handle the case where element might be deleted in the main export path.
if (!CacheData.CachedElements.ContainsKey(Entry.Key))
{
continue;
}
Element RevitElement = CacheData.SourceDocument.GetElement(Entry.Key);
if (RevitElement == null)
{
continue;
}
FDocumentData.FBaseElementData ElementData = Entry.Value;
FDatasmithFacadeActor Actor = ElementData.ElementActor;
ElementData.ElementMetaData = new FDatasmithFacadeMetaData(Actor.GetName() + "_DATA");
ElementData.ElementMetaData.SetLabel(Actor.GetLabel());
ElementData.ElementMetaData.SetAssociatedElement(Actor);
FDocumentData.AddActorMetadata(RevitElement, ElementData.ElementMetaData);
++CurrentBatchSize;
#if DEBUG
Debug.WriteLine($"metadata batch element {CurrentBatchSize}, remain in Q {CacheData.ElementsWithoutMetadata.Count}");
#endif
}
return(true);
};
List <FCachedDocumentData> CachesToExport = new List <FCachedDocumentData>();
Action <FCachedDocumentData> GetLinkedDocuments = null;
GetLinkedDocuments = (FCachedDocumentData InParent) =>
{
CachesToExport.Add(InParent);
foreach (var Cache in InParent.LinkedDocumentsCache.Values)
{
GetLinkedDocuments(Cache);
}
};
GetLinkedDocuments(RootCache);
foreach (var Cache in CachesToExport)
{
bool Success = AddElements(Cache);
if (!Success)
{
#if DEBUG
Debug.WriteLine("metadata cancelled");
#endif
return; // Metadata export was cancelled.
}
}
if (CurrentBatchSize > 0)
{
// Send remaining chunk of metadata.
DatasmithScene.BuildScene(SceneName);
DatasmithDirectLink.UpdateScene(DatasmithScene);
}
#if DEBUG
Debug.WriteLine("metadata exported");
#endif
}
private static void AddMetadataToDatasmithActor(FDatasmithFacadeActor InDatasmithActor, RhinoSceneHierarchyNode InNode, FDatasmithFacadeScene InDatasmithScene)
{
if (!InNode.Info.bHasRhinoObject)
{
return;
}
RhinoObject NodeObject = InNode.Info.RhinoModelComponent as RhinoObject;
NameValueCollection UserStrings = NodeObject.Attributes.GetUserStrings();
if (UserStrings != null && UserStrings.Count > 0)
{
string[] Keys = UserStrings.AllKeys;
FDatasmithFacadeMetaData DatasmithMetaData = new FDatasmithFacadeMetaData(InDatasmithActor.GetName() + "_DATA");
DatasmithMetaData.SetLabel(InDatasmithActor.GetLabel());
DatasmithMetaData.SetAssociatedElement(InDatasmithActor);
for (int KeyIndex = 0; KeyIndex < Keys.Length; ++KeyIndex)
{
string CurrentKey = Keys[KeyIndex];
string EvaluatedValue = FDatasmithRhinoUtilities.EvaluateAttributeUserText(InNode, UserStrings.Get(CurrentKey));
DatasmithMetaData.AddPropertyString(CurrentKey, EvaluatedValue);
}
InDatasmithScene.AddMetaData(DatasmithMetaData);
}
}