| public static ConstructIdForComponent ( NodeState component, ushort namespaceIndex ) : Opc.Ua.NodeId | ||
| component | NodeState | The component. |
| namespaceIndex | ushort | Index of the namespace. |
| return | Opc.Ua.NodeId | |
/// <summary>
/// Creates the NodeId for the specified node.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="node">The node.</param>
/// <returns>The new NodeId.</returns>
/// <remarks>
/// This method is called by the NodeState.Create() method which initializes a Node from
/// the type model. During initialization a number of child nodes are created and need to
/// have NodeIds assigned to them. This implementation constructs NodeIds by constructing
/// strings. Other implementations could assign unique integers or Guids and save the new
/// Node in a dictionary for later lookup.
/// </remarks>
public override NodeId New(ISystemContext context, NodeState node)
{
// do not assign node id to server state nodes.
if (node is ComServerStatusState)
{
return(node.NodeId);
}
return(DaModelUtils.ConstructIdForComponent(node, NamespaceIndex));
}
/// <summary>
/// Initializes the node from the element.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="element">The element.</param>
/// <param name="namespaceIndex">Index of the namespace.</param>
public void Initialize(ISystemContext context, DaElement element, ushort namespaceIndex)
{
m_element = element;
if (element == null)
{
return;
}
this.NodeId = DaModelUtils.ConstructIdForDaElement(element.ItemId, -1, namespaceIndex);
this.BrowseName = new QualifiedName(element.Name, namespaceIndex);
this.DisplayName = new LocalizedText(element.Name);
// check if TimeZone is supported.
if (element.TimeZone != null)
{
PropertyState property = this.AddProperty <Range>(Opc.Ua.BrowseNames.LocalTime, DataTypeIds.TimeZoneDataType, ValueRanks.Scalar);
property.NodeId = DaModelUtils.ConstructIdForComponent(property, namespaceIndex);
property.Value = new Range(element.HighIR, element.LowIR);
}
// set the TypeDefinition based on the ElementType.
switch (element.ElementType)
{
case DaElementType.AnalogItem:
{
this.TypeDefinitionId = Opc.Ua.VariableTypeIds.AnalogItemType;
// EURange is always present.
PropertyState property = this.AddProperty <Range>(Opc.Ua.BrowseNames.EURange, DataTypeIds.Range, ValueRanks.Scalar);
property.NodeId = DaModelUtils.ConstructIdForComponent(property, namespaceIndex);
property.Value = new Range(element.HighEU, element.LowEU);
// check if InstrumentRange is supported.
if (element.HighIR != 0 || element.LowIR != 0)
{
property = this.AddProperty <Range>(Opc.Ua.BrowseNames.InstrumentRange, DataTypeIds.Range, ValueRanks.Scalar);
property.NodeId = DaModelUtils.ConstructIdForComponent(property, namespaceIndex);
property.Value = new Range(element.HighIR, element.LowIR);
}
// check if EngineeringUnits is supported.
if (element.EngineeringUnits != null)
{
property = this.AddProperty <EUInformation>(Opc.Ua.BrowseNames.EngineeringUnits, DataTypeIds.EUInformation, ValueRanks.Scalar);
property.NodeId = DaModelUtils.ConstructIdForComponent(property, namespaceIndex);
// use the server's namespace uri to qualify the engineering units.
string namespaceUri = context.NamespaceUris.GetString(namespaceIndex);
property.Value = new EUInformation(element.EngineeringUnits, namespaceUri);
}
break;
}
case DaElementType.DigitalItem:
{
this.TypeDefinitionId = Opc.Ua.VariableTypeIds.TwoStateDiscreteType;
// check if CloseLabel is supported.
if (element.CloseLabel != null)
{
PropertyState property = this.AddProperty <LocalizedText>(Opc.Ua.BrowseNames.TrueState, DataTypeIds.LocalizedText, ValueRanks.Scalar);
property.NodeId = DaModelUtils.ConstructIdForComponent(property, namespaceIndex);
property.Value = element.CloseLabel;
}
// check if OpenLabel is supported.
if (element.OpenLabel != null)
{
PropertyState property = this.AddProperty <LocalizedText>(Opc.Ua.BrowseNames.FalseState, DataTypeIds.LocalizedText, ValueRanks.Scalar);
property.NodeId = DaModelUtils.ConstructIdForComponent(property, namespaceIndex);
property.Value = element.OpenLabel;
}
break;
}
case DaElementType.EnumeratedItem:
{
this.TypeDefinitionId = Opc.Ua.VariableTypeIds.MultiStateDiscreteType;
// check if EuInfo is supported.
if (element.EuInfo != null)
{
PropertyState property = this.AddProperty <LocalizedText[]>(Opc.Ua.BrowseNames.EnumStrings, DataTypeIds.LocalizedText, ValueRanks.OneDimension);
property.NodeId = DaModelUtils.ConstructIdForComponent(property, namespaceIndex);
LocalizedText[] strings = new LocalizedText[element.EuInfo.Length];
for (int ii = 0; ii < strings.Length; ii++)
{
strings[ii] = element.EuInfo[ii];
}
property.Value = strings;
}
break;
}
}
if (element.Description != null)
{
this.Description = element.Description;
}
this.Value = null;
this.StatusCode = StatusCodes.BadWaitingForInitialData;
this.Timestamp = DateTime.UtcNow;
bool isArray = false;
this.DataType = ComUtils.GetDataTypeId(element.DataType, out isArray);
this.ValueRank = (isArray)?ValueRanks.OneOrMoreDimensions:ValueRanks.Scalar;
this.AccessLevel = AccessLevels.None;
if ((element.AccessRights & OpcRcw.Da.Constants.OPC_READABLE) != 0)
{
this.AccessLevel |= AccessLevels.CurrentRead;
}
if ((element.AccessRights & OpcRcw.Da.Constants.OPC_WRITEABLE) != 0)
{
this.AccessLevel |= AccessLevels.CurrentWrite;
}
this.UserAccessLevel = this.AccessLevel;
this.MinimumSamplingInterval = element.ScanRate;
}
