/// <summary>
/// Updates the header of a service request.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="useDefaults">if set to <c>true</c> use defaults].</param>
protected virtual void UpdateRequestHeader(IServiceRequest request, bool useDefaults)
{
lock (m_lock)
{
if (request.RequestHeader == null)
{
request.RequestHeader = new RequestHeader();
}
if (useDefaults)
{
request.RequestHeader.ReturnDiagnostics = (uint)(int)m_returnDiagnostics;
}
if (request.RequestHeader.RequestHandle == 0)
{
request.RequestHeader.RequestHandle = (uint)Utils.IncrementIdentifier(ref m_nextRequestHandle);
}
if (NodeId.IsNull(request.RequestHeader.AuthenticationToken))
{
request.RequestHeader.AuthenticationToken = m_authenticationToken;
}
request.RequestHeader.Timestamp = DateTime.UtcNow;
request.RequestHeader.AuditEntryId = CreateAuditLogEntry(request);
}
}
/// <summary>
/// Generates a unique request handle.
/// </summary>
public uint NewRequestHandle()
{
return((uint)Utils.IncrementIdentifier(ref m_nextRequestHandle));
}
/// <summary>
/// Instantiates the hierarchy.
/// </summary>
private IList <ILocalNode> InstantiateHierarchy(
ILocalNode root,
InstanceDeclarationHierarchy hierarchy,
ref long counter,
ushort namespaceIndex)
{
List <ILocalNode> nodesToAdd = new List <ILocalNode>();
List <HierarchyBrowsePath> nodesToUpdate = new List <HierarchyBrowsePath>();
// create an instance for each browse path that does not already have one.
foreach (HierarchyBrowsePath browsePath in hierarchy.BrowsePaths.Values)
{
bool updateReferences = browsePath.BrowsePath == "/";
// find the instance.
INode instance = m_nodes.Find(browsePath.InstanceId);
if (instance == null)
{
// do nothing if optional.
if (browsePath.IsOptional)
{
continue;
}
// find the declaration.
ILocalNode declaration = m_nodes.Find(browsePath.DeclarationId) as ILocalNode;
if (declaration == null)
{
continue;
}
instance = declaration;
// check the creation rule.
CreationRule creationRule = GetCreationRule(declaration.ModellingRule);
// create a new instance is the creation rule is new.
if (creationRule == CreationRule.New)
{
Node newNode = Node.Copy(declaration);
newNode.NodeId = new NodeId(Utils.IncrementIdentifier(ref counter), namespaceIndex);
instance = newNode;
nodesToAdd.Add(newNode);
updateReferences = true;
}
}
// update the browse path.
browsePath.InstanceId = instance.NodeId;
hierarchy.Instances[(NodeId)instance.NodeId] = instance;
// check if instance can be traced back to root.
if (!updateReferences)
{
continue;
}
nodesToUpdate.Add(browsePath);
}
// create the references.
foreach (HierarchyBrowsePath browsePath in nodesToUpdate)
{
if (browsePath.InstanceId != null)
{
InstantiateReferences(browsePath, hierarchy);
}
}
return(nodesToAdd);
}