public static bool IsNull(ExpandedNodeId?nodeId)
{
return((nodeId == null) || NodeId.IsNull(nodeId.NodeId));
}
/// <summary>
/// Initializes a new instance of the <see cref="MonitoredItemCollection"/> class.
/// Attributes found in the given subscription are added to the collection.
/// </summary>
/// <param name="subscription">the instance that will be inspected for [MonitoredItem] attributes.</param>
public MonitoredItemCollection(object subscription)
{
var typeInfo = subscription.GetType().GetTypeInfo();
foreach (var propertyInfo in typeInfo.DeclaredProperties)
{
var itemAttribute = propertyInfo.GetCustomAttribute <MonitoredItemAttribute>();
if (itemAttribute == null || string.IsNullOrEmpty(itemAttribute.NodeId))
{
continue;
}
MonitoringFilter filter = null;
if (itemAttribute.AttributeId == AttributeIds.Value && (itemAttribute.DataChangeTrigger != DataChangeTrigger.StatusValue || itemAttribute.DeadbandType != DeadbandType.None))
{
filter = new DataChangeFilter()
{
Trigger = itemAttribute.DataChangeTrigger, DeadbandType = (uint)itemAttribute.DeadbandType, DeadbandValue = itemAttribute.DeadbandValue
};
}
var propType = propertyInfo.PropertyType;
if (propType == typeof(DataValue))
{
this.Add(new DataValueMonitoredItem(
property: propertyInfo,
nodeId: NodeId.Parse(itemAttribute.NodeId),
indexRange: itemAttribute.IndexRange,
attributeId: itemAttribute.AttributeId,
samplingInterval: itemAttribute.SamplingInterval,
filter: filter,
queueSize: itemAttribute.QueueSize,
discardOldest: itemAttribute.DiscardOldest));
continue;
}
if (propType == typeof(ObservableQueue <DataValue>))
{
this.Add(new DataValueQueueMonitoredItem(
property: propertyInfo,
nodeId: NodeId.Parse(itemAttribute.NodeId),
indexRange: itemAttribute.IndexRange,
attributeId: itemAttribute.AttributeId,
samplingInterval: itemAttribute.SamplingInterval,
filter: filter,
queueSize: itemAttribute.QueueSize,
discardOldest: itemAttribute.DiscardOldest));
continue;
}
if (propType == typeof(BaseEvent) || propType.GetTypeInfo().IsSubclassOf(typeof(BaseEvent)))
{
this.Add(new EventMonitoredItem(
property: propertyInfo,
nodeId: NodeId.Parse(itemAttribute.NodeId),
indexRange: itemAttribute.IndexRange,
attributeId: itemAttribute.AttributeId,
samplingInterval: itemAttribute.SamplingInterval,
filter: new EventFilter()
{
SelectClauses = EventHelper.GetSelectClauses(propType)
},
queueSize: itemAttribute.QueueSize,
discardOldest: itemAttribute.DiscardOldest));
continue;
}
if (propType.IsConstructedGenericType && propType.GetGenericTypeDefinition() == typeof(ObservableQueue <>))
{
var elemType = propType.GenericTypeArguments[0];
if (elemType == typeof(BaseEvent) || elemType.GetTypeInfo().IsSubclassOf(typeof(BaseEvent)))
{
this.Add((MonitoredItemBase)Activator.CreateInstance(
typeof(EventQueueMonitoredItem <>).MakeGenericType(elemType),
propertyInfo,
NodeId.Parse(itemAttribute.NodeId),
itemAttribute.AttributeId,
itemAttribute.IndexRange,
MonitoringMode.Reporting,
itemAttribute.SamplingInterval,
new EventFilter()
{
SelectClauses = EventHelper.GetSelectClauses(elemType)
},
itemAttribute.QueueSize,
itemAttribute.DiscardOldest));
continue;
}
}
this.Add(new ValueMonitoredItem(
property: propertyInfo,
nodeId: NodeId.Parse(itemAttribute.NodeId),
indexRange: itemAttribute.IndexRange,
attributeId: itemAttribute.AttributeId,
samplingInterval: itemAttribute.SamplingInterval,
filter: filter,
queueSize: itemAttribute.QueueSize,
discardOldest: itemAttribute.DiscardOldest));
}
}
public ExpandedNodeId(NodeId identifier, string?namespaceUri = null, uint serverIndex = 0)
{
this.NodeId = identifier;
this.NamespaceUri = namespaceUri;
this.ServerIndex = serverIndex;
}
public Variant(NodeId value)
{
this.Value = value;
this.Type = VariantType.NodeId;
this.ArrayDimensions = null;
}
