Opc.Ua.Com.Server.ComAeUtils.CollectInstanceDeclarations C# (CSharp) Method

        public static void CollectInstanceDeclarations(
            Session session,
            ComNamespaceMapper mapper,
            NodeId typeId,
            AeEventAttribute parent,
            List<AeEventAttribute> instances,
            IDictionary<string, AeEventAttribute> map)
        {
            // find the children.
            BrowseDescription nodeToBrowse = new BrowseDescription();

            if (parent == null)
            {
                nodeToBrowse.NodeId = typeId;
            }
            else
            {
                nodeToBrowse.NodeId = parent.NodeId;
            }

            nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
            nodeToBrowse.ReferenceTypeId = ReferenceTypeIds.HasChild;
            nodeToBrowse.IncludeSubtypes = true;
            nodeToBrowse.NodeClassMask = (uint)(NodeClass.Object | NodeClass.Variable);
            nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;

            // ignore any browsing errors.
            ReferenceDescriptionCollection references = Browse(session, nodeToBrowse, false);

            if (references == null)
            {
                return;
            }

            // process the children.
            List<NodeId> nodeIds = new List<NodeId>();
            List<AeEventAttribute> children = new List<AeEventAttribute>();

            for (int ii = 0; ii < references.Count; ii++)
            {
                ReferenceDescription reference = references[ii];

                if (reference.NodeId.IsAbsolute)
                {
                    continue;
                }

                // create a new declaration.
                AeEventAttribute child = new AeEventAttribute();

                child.RootTypeId = typeId;
                child.NodeId = (NodeId)reference.NodeId;
                child.BrowseName = reference.BrowseName;
                child.NodeClass = reference.NodeClass;

                if (!LocalizedText.IsNullOrEmpty(reference.DisplayName))
                {
                    child.DisplayName = reference.DisplayName.Text;
                }
                else
                {
                    child.DisplayName = reference.BrowseName.Name;
                }

                if (parent != null)
                {
                    child.BrowsePath = new QualifiedNameCollection(parent.BrowsePath);
                    child.BrowsePathDisplayText = Utils.Format("{0}/{1}", parent.BrowsePathDisplayText, mapper.GetLocalBrowseName(reference.BrowseName));
                    child.DisplayPath = Utils.Format("{0}/{1}", parent.DisplayPath, reference.DisplayName);
                }
                else
                {
                    child.BrowsePath = new QualifiedNameCollection();
                    child.BrowsePathDisplayText = Utils.Format("{0}", reference.BrowseName);
                    child.DisplayPath = Utils.Format("{0}", reference.DisplayName);
                }

                child.BrowsePath.Add(reference.BrowseName);

                // check if reading an overridden declaration.
                AeEventAttribute overriden = null;

                if (map.TryGetValue(child.BrowsePathDisplayText, out overriden))
                {
                    child.OverriddenDeclaration = overriden;
                }

                map[child.BrowsePathDisplayText] = child;

                // add to list.
                children.Add(child);
                nodeIds.Add(child.NodeId);
            }

            // check if nothing more to do.
            if (children.Count == 0)
            {
                return;
            }

            // find the modelling rules.
            List<NodeId> modellingRules = FindTargetOfReference(session, nodeIds, Opc.Ua.ReferenceTypeIds.HasModellingRule, false);

            if (modellingRules != null)
            {
                for (int ii = 0; ii < nodeIds.Count; ii++)
                {
                    children[ii].ModellingRule = modellingRules[ii];

                    // if the modelling rule is null then the instance is not part of the type declaration.
                    if (NodeId.IsNull(modellingRules[ii]))
                    {
                        map.Remove(children[ii].BrowsePathDisplayText);
                    }
                }
            }

            // update the descriptions.
            UpdateInstanceDescriptions(session, children, false);

            // recusively collect instance declarations for the tree below.
            for (int ii = 0; ii < children.Count; ii++)
            {
                if (!NodeId.IsNull(children[ii].ModellingRule))
                {
                    instances.Add(children[ii]);
                    CollectInstanceDeclarations(session, mapper, typeId, children[ii], instances, map);
                }
            }
        }

        /// <summary>
        /// Recursively populates the event types table.
        /// </summary>
        private void IndexTypesFromServer(NodeId baseTypeId, int eventType)
        {
            // check if event type needs to be revised.
            if (baseTypeId == Opc.Ua.ObjectTypeIds.ConditionType)
            {
                eventType = OpcRcw.Ae.Constants.CONDITION_EVENT;
            }

            else if (baseTypeId == Opc.Ua.ObjectTypeIds.AuditEventType)
            {
                eventType = OpcRcw.Ae.Constants.TRACKING_EVENT;
            }

            else if (baseTypeId == Opc.Ua.ObjectTypeIds.BaseEventType)
            {
                eventType = OpcRcw.Ae.Constants.SIMPLE_EVENT;
            }

            // browse for subtypes.
            BrowseDescription nodeToBrowse = new BrowseDescription();

            nodeToBrowse.NodeId          = baseTypeId;
            nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
            nodeToBrowse.ReferenceTypeId = Opc.Ua.ReferenceTypeIds.HasSubtype;
            nodeToBrowse.IncludeSubtypes = false;
            nodeToBrowse.NodeClassMask   = (uint)NodeClass.ObjectType;
            nodeToBrowse.ResultMask      = (uint)(BrowseResultMask.BrowseName | BrowseResultMask.DisplayName | BrowseResultMask.NodeClass);

            ReferenceDescriptionCollection references = ComAeUtils.Browse(
                m_session,
                nodeToBrowse,
                false);

            for (int ii = 0; ii < references.Count; ii++)
            {
                // these types have t
                if (references[ii].NodeId.IsAbsolute)
                {
                    continue;
                }

                NodeId typeId = (NodeId)references[ii].NodeId;

                if (!m_eventTypes.ContainsKey(typeId))
                {
                    // collection the instances declared by the type.
                    List <AeEventAttribute> declarations      = new List <AeEventAttribute>();
                    Dictionary <string, AeEventAttribute> map = new Dictionary <string, AeEventAttribute>();

                    ComAeUtils.CollectInstanceDeclarations(
                        m_session,
                        this,
                        (NodeId)references[ii].NodeId,
                        null,
                        declarations,
                        map);

                    AeEventCategory declaration = new AeEventCategory();
                    declaration.TypeId               = (NodeId)references[ii].NodeId;
                    declaration.SuperTypeId          = baseTypeId;
                    declaration.EventType            = eventType;
                    declaration.Description          = (LocalizedText.IsNullOrEmpty(references[ii].DisplayName)) ? references[ii].BrowseName.Name : references[ii].DisplayName.Text;
                    declaration.Attributes           = declarations;
                    m_eventTypes[declaration.TypeId] = declaration;
                }

                // recursively look for subtypes.
                IndexTypesFromServer(typeId, eventType);
            }
        }