private void BuildOrderBySkipTake(OeNavigationSelectItem navigationItem, OrderByClause orderByClause, bool hasSelectItems)
        {
            while (orderByClause != null)
            {
                var propertyNode = (SingleValuePropertyAccessNode)orderByClause.Expression;
                if (propertyNode.Source is SingleNavigationNode navigationNode)
                {
                    OeNavigationSelectItem       match;
                    ExpandedNavigationSelectItem navigationSelectItem = null;
                    do
                    {
                        if ((match = navigationItem.FindHierarchyNavigationItem(navigationNode.NavigationProperty)) != null)
                        {
                            match.AddStructuralItem((IEdmStructuralProperty)propertyNode.Property, true);
                            break;
                        }

                        SelectExpandClause selectExpandClause;
                        if (navigationSelectItem == null)
                        {
                            var pathSelectItem = new PathSelectItem(new ODataSelectPath(new PropertySegment((IEdmStructuralProperty)propertyNode.Property)));
                            selectExpandClause = new SelectExpandClause(new[] { pathSelectItem }, false);
                        }
                        else
                        {
                            selectExpandClause = new SelectExpandClause(new[] { navigationSelectItem }, false);
                        }

                        var segment = new NavigationPropertySegment(navigationNode.NavigationProperty, navigationNode.NavigationSource);
                        navigationSelectItem = new ExpandedNavigationSelectItem(new ODataExpandPath(segment), navigationNode.NavigationSource, selectExpandClause);
                    }while ((navigationNode = navigationNode.Source as SingleNavigationNode) != null);

                    if (navigationSelectItem != null)
                    {
                        if (match == null)
                        {
                            match = navigationItem;
                        }

                        var selectItemTranslator = new OeSelectItemTranslator(_edmModel, true);
                        selectItemTranslator.Translate(match, navigationSelectItem);
                    }
                }
                else
                {
                    if (hasSelectItems)
                    {
                        navigationItem.AddStructuralItem((IEdmStructuralProperty)propertyNode.Property, true);
                    }
                }

                orderByClause = orderByClause.ThenBy;
            }
        }
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        public void BuildSelect(SelectExpandClause selectClause, OeMetadataLevel metadataLevel)
        {
            if (selectClause != null)
            {
                var selectItemTranslator = new OeSelectItemTranslator(_edmModel, false);
                foreach (SelectItem selectItemClause in selectClause.SelectedItems)
                {
                    selectItemTranslator.Translate(_rootNavigationItem, selectItemClause);
                }
            }

            _rootNavigationItem.AddKeyRecursive(metadataLevel != OeMetadataLevel.Full);
        }