/// <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 = ModelUtils.ConstructIdForDaElement(element.ItemId, -1, namespaceIndex);
this.BrowseName = new QualifiedName(element.Name, namespaceIndex);
this.DisplayName = new LocalizedText(element.Name);
}
/// <summary>
/// Initializes the node from the element.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="itemId">The item id.</param>
/// <param name="property">The property.</param>
/// <param name="namespaceIndex">Index of the namespace.</param>
public void Initialize(ISystemContext context, string itemId, DaProperty property, ushort namespaceIndex)
{
m_itemId = itemId;
m_property = property;
if (property == null)
{
return;
}
this.NodeId = ModelUtils.ConstructIdForDaElement(m_itemId, property.PropertyId, namespaceIndex);
this.BrowseName = new QualifiedName(property.Name, namespaceIndex);
this.DisplayName = new LocalizedText(property.Name);
this.TypeDefinitionId = Opc.Ua.VariableTypeIds.PropertyType;
this.Value = null;
this.StatusCode = StatusCodes.BadWaitingForInitialData;
this.Timestamp = DateTime.UtcNow;
bool isArray = false;
this.DataType = ComUtils.GetDataTypeId(property.DataType, out isArray);
this.ValueRank = (isArray)?ValueRanks.OneOrMoreDimensions:ValueRanks.Scalar;
this.ArrayDimensions = null;
// assume that properties with item ids are writeable. the server may still reject the write.
if (String.IsNullOrEmpty(property.ItemId))
{
this.AccessLevel = AccessLevels.CurrentRead;
}
else
{
this.AccessLevel = AccessLevels.CurrentReadOrWrite;
}
this.UserAccessLevel = this.AccessLevel;
this.MinimumSamplingInterval = MinimumSamplingIntervals.Indeterminate;
this.Historizing = false;
// add a reference to the parent node.
NodeId parentNodeId = ModelUtils.ConstructIdForDaElement(itemId, -1, namespaceIndex);
this.AddReference(ReferenceTypeIds.HasProperty, true, parentNodeId);
}
/// <summary>
/// Returns the next child.
/// </summary>
private NodeStateReference NextChild(Stage stage)
{
ComDaClientManager system = (ComDaClientManager)this.SystemContext.SystemHandle;
ComDaClient client = system.SelectClient((ServerSystemContext)SystemContext);
DaElement element = null;
if (stage == Stage.Children)
{
if (m_browser == null)
{
return(null);
}
element = m_browser.Next();
if (element == null)
{
return(null);
}
// construct the node.
NodeState node = ModelUtils.ConstructElement(SystemContext, element, m_namespaceIndex);
// return the reference.
return(new NodeStateReference(ReferenceTypeIds.Organizes, false, node));
}
if (stage == Stage.Properties)
{
if (m_properties == null)
{
return(null);
}
for (int ii = m_position; ii < m_properties.Length; ii++)
{
if (m_properties[ii].PropertyId <= PropertyIds.TimeZone)
{
continue;
}
m_position = ii + 1;
// construct the node.
NodeState node = ModelUtils.ConstructProperty(SystemContext, m_itemId, m_properties[ii], m_namespaceIndex);
// return the reference.
return(new NodeStateReference(ReferenceTypeIds.HasProperty, false, node));
}
// all done.
return(null);
}
if (stage == Stage.Parents)
{
if (m_parentId != null)
{
NodeId parentId = ModelUtils.ConstructIdForDaElement(m_parentId, -1, m_namespaceIndex);
m_parentId = null;
return(new NodeStateReference(ReferenceTypeIds.Organizes, true, parentId));
}
}
return(null);
}
/// <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 = ModelUtils.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.TimeZone, DataTypeIds.TimeZoneDataType, ValueRanks.Scalar);
property.NodeId = ModelUtils.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 = ModelUtils.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 = ModelUtils.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 = ModelUtils.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;
this.EnumStrings = new PropertyState <LocalizedText[]>(this);
// check if CloseLabel is supported.
if (element.CloseLabel != null)
{
PropertyState property = this.AddProperty <LocalizedText>(Opc.Ua.BrowseNames.TrueState, DataTypeIds.LocalizedText, ValueRanks.Scalar);
property.NodeId = ModelUtils.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 = ModelUtils.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 = ModelUtils.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;
}