Opc.Ua.Com.Server.ComDaBrowseCache.UpdateBrowseElement C# (CSharp) Method

        private bool UpdateBrowseElement(
            BrowseElement element,
            BrowseDescriptionCollection nodesToBrowse,
            BrowseResultCollection results,
            int first)
        {
            // check for a valid range within the collection.
            if (first < 0 || first >= nodesToBrowse.Count)
            {
                return false;
            }

            bool missingReferences = false;

            // process all references.
            Dictionary<string,ReferenceDescription> referencesByName = new Dictionary<string, ReferenceDescription>();
            Dictionary<string,ReferenceDescription> duplicateNames = new Dictionary<string, ReferenceDescription>();

            for (int ii = first; ii < first+2; ii++)
            {
                BrowseResult result = results[ii];

                // check for errors - rejected node id are fatal; others can be ignored.
                if (StatusCode.IsBad(result.StatusCode))
                {
                    if (result.StatusCode == StatusCodes.BadNodeIdInvalid || result.StatusCode == StatusCodes.BadNodeIdInvalid || result.StatusCode == StatusCodes.BadNodeNotInView)
                    {
                        return false;
                    }

                    missingReferences = true;
                    continue;
                }

                // eliminate duplicates and index references by browse name.
                for (int jj = 0; jj < result.References.Count; jj++)
                {
                    ReferenceDescription reference = result.References[jj];

                    // ignore off server references.
                    if (reference.NodeId == null || reference.NodeId.IsAbsolute)
                    {
                        continue;
                    }

                    // construct the browse name.
                    string browseName = m_mapper.GetLocalBrowseName(reference.BrowseName);

                    if (reference.DisplayName != null)
                    {
                        browseName = reference.DisplayName.Text;
                    }

                    // check for duplicates.
                    ReferenceDescription duplicate = null;

                    if (referencesByName.TryGetValue(browseName, out duplicate))
                    {
                        if (reference.NodeId != duplicate.NodeId)
                        {
                            duplicateNames[browseName] = duplicate;
                        }

                        continue;
                    }

                    // add to table.
                    referencesByName.Add(browseName, reference);
                }
            }

            // remove duplicates.
            foreach (string duplicateName in duplicateNames.Keys)
            {
                referencesByName.Remove(duplicateName);
            }

            // save child lookup table.
            element.ReferencesByName = referencesByName;
            element.MissingReferences = missingReferences;
            
            // update the masks.
            SetElementMasks(element);
            return true;
        }