Opc.Ua.Com.Server.ComDaBrowseCache.PrepareBrowseElementReadRequest C# (CSharp) Метод

        private int PrepareBrowseElementReadRequest(
            NodeId nodeId,
            Dictionary<string, ReferenceDescription> childrenByName,
            ReadValueIdCollection nodesToRead,
            NodeClass nodeClass,
            bool onlyEssentialProperties)
        {
            int index = nodesToRead.Count;

            ReadValueId nodeToRead = new ReadValueId();

            if (nodeClass == NodeClass.Unspecified)
            {
                nodeToRead.NodeId = nodeId;
                nodeToRead.AttributeId = Attributes.NodeClass;
                nodesToRead.Add(nodeToRead);

                nodeToRead = new ReadValueId();
                nodeToRead.NodeId = nodeId;
                nodeToRead.AttributeId = Attributes.BrowseName;
                nodesToRead.Add(nodeToRead);

                nodeToRead = new ReadValueId();
                nodeToRead.NodeId = nodeId;
                nodeToRead.AttributeId = Attributes.DisplayName;
                nodesToRead.Add(nodeToRead);
            }

            if (!onlyEssentialProperties)
            {
                nodeToRead = new ReadValueId();
                nodeToRead.NodeId = nodeId;
                nodeToRead.AttributeId = Attributes.Description;
                nodesToRead.Add(nodeToRead);
            }

            // nothing more to fetch for objects.
            if (nodeClass == NodeClass.Object)
            {
                return index;
            }

            nodeToRead = new ReadValueId();
            nodeToRead.NodeId = nodeId;
            nodeToRead.AttributeId = Attributes.DataType;
            nodesToRead.Add(nodeToRead);

            nodeToRead = new ReadValueId();
            nodeToRead.NodeId = nodeId;
            nodeToRead.AttributeId = Attributes.ValueRank;
            nodesToRead.Add(nodeToRead);

            if (!onlyEssentialProperties)
            {
                nodeToRead = new ReadValueId();
                nodeToRead.NodeId = nodeId;
                nodeToRead.AttributeId = Attributes.MinimumSamplingInterval;
                nodesToRead.Add(nodeToRead);

                nodeToRead = new ReadValueId();
                nodeToRead.NodeId = nodeId;
                nodeToRead.AttributeId = Attributes.UserAccessLevel;
                nodesToRead.Add(nodeToRead);

                nodeToRead = new ReadValueId();
                nodeToRead.NodeId = nodeId;
                nodeToRead.AttributeId = Attributes.Value;
                nodesToRead.Add(nodeToRead);

                ReferenceDescription property = null;

                if (childrenByName.TryGetValue(Opc.Ua.BrowseNames.EURange, out property))
                {
                    nodeToRead = new ReadValueId();
                    nodeToRead.NodeId = (NodeId)property.NodeId;
                    nodeToRead.AttributeId = Attributes.Value;
                    nodeToRead.Handle = Opc.Ua.BrowseNames.EURange;
                    nodesToRead.Add(nodeToRead);
                }

                if (childrenByName.TryGetValue(Opc.Ua.BrowseNames.InstrumentRange, out property))
                {
                    nodeToRead = new ReadValueId();
                    nodeToRead.NodeId = (NodeId)property.NodeId;
                    nodeToRead.AttributeId = Attributes.Value;
                    nodeToRead.Handle = Opc.Ua.BrowseNames.InstrumentRange;
                    nodesToRead.Add(nodeToRead);
                }

                if (childrenByName.TryGetValue(Opc.Ua.BrowseNames.EngineeringUnits, out property))
                {
                    nodeToRead = new ReadValueId();
                    nodeToRead.NodeId = (NodeId)property.NodeId;
                    nodeToRead.AttributeId = Attributes.Value;
                    nodeToRead.Handle = Opc.Ua.BrowseNames.EngineeringUnits;
                    nodesToRead.Add(nodeToRead);
                }

                if (childrenByName.TryGetValue(Opc.Ua.BrowseNames.EnumStrings, out property))
                {
                    nodeToRead = new ReadValueId();
                    nodeToRead.NodeId = (NodeId)property.NodeId;
                    nodeToRead.AttributeId = Attributes.Value;
                    nodeToRead.Handle = Opc.Ua.BrowseNames.EnumStrings;
                    nodesToRead.Add(nodeToRead);
                }

                if (childrenByName.TryGetValue(Opc.Ua.BrowseNames.TrueState, out property))
                {
                    nodeToRead = new ReadValueId();
                    nodeToRead.NodeId = (NodeId)property.NodeId;
                    nodeToRead.AttributeId = Attributes.Value;
                    nodeToRead.Handle = Opc.Ua.BrowseNames.TrueState;
                    nodesToRead.Add(nodeToRead);
                }

                if (childrenByName.TryGetValue(Opc.Ua.BrowseNames.FalseState, out property))
                {
                    nodeToRead = new ReadValueId();
                    nodeToRead.NodeId = (NodeId)property.NodeId;
                    nodeToRead.AttributeId = Attributes.Value;
                    nodeToRead.Handle = Opc.Ua.BrowseNames.FalseState;
                    nodesToRead.Add(nodeToRead);
                }

                if (childrenByName.TryGetValue(Opc.Ua.BrowseNames.LocalTime, out property))
                {
                    nodeToRead = new ReadValueId();
                    nodeToRead.NodeId = (NodeId)property.NodeId;
                    nodeToRead.AttributeId = Attributes.Value;
                    nodeToRead.Handle = Opc.Ua.BrowseNames.LocalTime;
                    nodesToRead.Add(nodeToRead);
                }
            }

            return index;
        }