| public AddSelectClause ( Opc.Ua.NodeId eventTypeId, Opc.Ua.QualifiedName propertyName ) : void | ||
| eventTypeId | Opc.Ua.NodeId | |
| propertyName | Opc.Ua.QualifiedName | |
| return | void | |
public Result <DataResponse> GetEventData(OpcUAQuery query, NodeId startNodeId, Opc.Ua.EventFilter eventFilter)
{
var nodeCache = _nodeCacheFactory.Create(_session);
eventFilter.AddSelectClause(ObjectTypeIds.BaseEventType, "SourceNode");
eventFilter.AddSelectClause(ObjectTypeIds.BaseEventType, "EventType");
var eventFilterValues = GetEventFilterValues(startNodeId, eventFilter);
if (eventFilterValues == null)
{
var monitorItem = AddMonitorItem(startNodeId, eventFilter);
eventFilterValues = new EventFilterValues(monitorItem, query, eventFilter);
if (!TryAddEventFilterValues(startNodeId, eventFilterValues))
{
RemoveMonitorItem(monitorItem);
eventFilterValues = null;
}
}
lock (_eventData)
{
if (eventFilterValues == null)
{
eventFilterValues = GetEventFilterValues(startNodeId, eventFilter);
}
if (eventFilterValues != null)
{
return(_eventDataResponse.CreateEventSubscriptionDataResponse(eventFilterValues.Values.Values, query, nodeCache));
}
}
return(new Result <DataResponse>(StatusCodes.BadUnexpectedError, ""));
}
internal static Opc.Ua.EventFilter GetEventFilter(OpcUAQuery query, NamespaceTable namespaceTable)
{
var eventFilter = new Opc.Ua.EventFilter();
if (query.eventQuery?.eventColumns != null)
{
foreach (var column in query.eventQuery.eventColumns)
{
var bp = Converter.GetBrowsePath(column.browsePath, namespaceTable);
var path = SimpleAttributeOperand.Format(bp);
eventFilter.AddSelectClause(ObjectTypes.BaseEventType, path, Attributes.Value);
}
}
if (query.eventQuery?.eventFilters != null)
{
for (int i = 0; i < query.eventQuery.eventFilters.Length; i++)
{
var filter = query.eventQuery.eventFilters[i];
eventFilter.WhereClause.Push(filter.oper, GetOperands(filter, namespaceTable));
}
}
return(eventFilter);
}
