Opc.Ua.Server.CoreNodeManager.CreateObject C# (CSharp) Method

        public NodeId CreateObject(
            NodeId           parentId,
            NodeId           referenceTypeId,
            NodeId           nodeId,
            QualifiedName    browseName,
            ObjectAttributes attributes,
            ExpandedNodeId   typeDefinitionId)
        {
            try
            {
                m_lock.Enter();

                // validate browse name.
                if (QualifiedName.IsNull(browseName))
                {
                    throw ServiceResultException.Create(StatusCodes.BadBrowseNameInvalid, "BrowsName must not be empty.");
                }

                // check for null node id.
                if (NodeId.IsNull(nodeId))
                {
                    nodeId = CreateUniqueNodeId();
                }

                // check if node id exists.
                if (m_nodes.Exists(nodeId))
                {
                    throw ServiceResultException.Create(StatusCodes.BadNodeIdExists, "NodeId '{0}' already exists.", nodeId);
                }

                // find parent.
                ILocalNode parent = null;

                if (!NodeId.IsNull(parentId))
                {
                    parent = GetManagerHandle(parentId) as ILocalNode;

                    if (parent == null)
                    {
                        throw ServiceResultException.Create(StatusCodes.BadParentNodeIdInvalid, "Parent node '{0}' does not exist.", parentId);
                    }

                    // validate reference.
                    ValidateReference(parent, referenceTypeId, false, NodeClass.Object);
                }

                // find type definition.
                if (NodeId.IsNull(typeDefinitionId))
                {
                    typeDefinitionId = ObjectTypes.BaseObjectType;
                }

                IObjectType objectType = GetManagerHandle(typeDefinitionId) as IObjectType;

                if (objectType == null)
                {
                    throw ServiceResultException.Create(StatusCodes.BadTypeDefinitionInvalid, "Type definition '{0}' does not exist or is not an ObjectType.", typeDefinitionId);
                }                               

                // verify instance declarations.
                ILocalNode instanceDeclaration = FindInstanceDeclaration(parent, browseName);

                if (instanceDeclaration != null)
                {
                    if (instanceDeclaration.NodeClass != NodeClass.Object)
                    {                        
                        throw ServiceResultException.Create(
                            StatusCodes.BadNodeClassInvalid, 
                            "The type model requires that node with a browse name of {0} have a NodeClass of {1}.", 
                            browseName,
                            instanceDeclaration.NodeClass);
                    }

                    if (!m_server.TypeTree.IsTypeOf(typeDefinitionId, instanceDeclaration.TypeDefinitionId))
                    {
                        throw ServiceResultException.Create(
                            StatusCodes.BadNodeClassInvalid, 
                            "The type model requires that node have a type definition of {0}.", 
                            instanceDeclaration.TypeDefinitionId);
                    }
                }

                // get the variable.
                IObject objectd = instanceDeclaration as IObject;

                // create node.
                ObjectNode node = new ObjectNode();

                // set defaults from type definition.
                node.NodeId        = nodeId;
                node.NodeClass     = NodeClass.Object;
                node.BrowseName    = browseName;
                node.DisplayName   = browseName.Name;
                node.Description   = null;
                node.WriteMask     = 0;
                node.UserWriteMask = 0;
                node.EventNotifier = EventNotifiers.None;

                // set defaults from instance declaration.
                if (objectd != null)
                {
                    node.DisplayName   = objectd.DisplayName;
                    node.Description   = objectd.Description;
                    node.WriteMask     = (uint)objectd.WriteMask;
                    node.UserWriteMask = (uint)objectd.UserWriteMask;
                    node.EventNotifier = objectd.EventNotifier;
                }            
                      
                // update with attributes provided.
                UpdateAttributes(node, attributes);

                // EventNotifier    
                if (attributes != null && (attributes.SpecifiedAttributes & (uint)NodeAttributesMask.EventNotifier) != 0)
                {
                    node.EventNotifier = attributes.EventNotifier;
                }

                // add references with parent.
                if (parent != null)
                {
                    AddReference(parent, referenceTypeId, false, node, true);                
                }
                
                // add type definition.
                AddReference(node, ReferenceTypeIds.HasTypeDefinition, false, objectType, false);     

                // add to address space.
                AddNode(node);
                                
                // apply modelling rules.
                NodeFactory factory = new NodeFactory(m_nodes);

                IList<ILocalNode> nodesToAdd = factory.ApplyModellingRules(node, objectType.NodeId, ref m_lastId, 1);
                
                // add the nodes.
                foreach (Node nodeToAdd in nodesToAdd)
                {               
                    AddNode(nodeToAdd);
                }
                
                // find the top level parent that must be used to apply the modelling rules.
                if (instanceDeclaration != null)
                {
                    ILocalNode toplevelParent = FindTopLevelModelParent(parent);
                    
                    // add modelling rule.
                    AddReference(node, ReferenceTypeIds.HasModelParent, false, parent, true);     
                                    
                    // update the hierarchy.
                    nodesToAdd = factory.ApplyModellingRules(toplevelParent, (NodeId)toplevelParent.TypeDefinitionId, ref m_lastId, 1);
                    
                    // add the nodes.
                    foreach (Node nodeToAdd in nodesToAdd)
                    {               
                        AddNode(nodeToAdd);
                    }
                }

                // return the new node id.
                return node.NodeId;
            }
            finally
            {
                m_lock.Exit();
            } 
        }