protected override void SetOperations()

in src/Microsoft.OpenApi.OData.Reader/PathItem/RefPathItemHandler.cs [36:92]
44 lines of code
13 McCabe index (conditional complexity)

        protected override void SetOperations(OpenApiPathItem item)
        {
            IEdmEntitySet entitySet = NavigationSource as IEdmEntitySet;
            IEdmVocabularyAnnotatable target = entitySet;
            if (target == null)
            {
                target = NavigationSource as IEdmSingleton;
            }

            string navigationPropertyPath = String.Join("/",
                Path.Segments.Where(s => !(s is ODataKeySegment || s is ODataNavigationSourceSegment)).Select(e => e.Identifier));

            NavigationRestrictionsType navigation = Context.Model.GetRecord<NavigationRestrictionsType>(target, CapabilitiesConstants.NavigationRestrictions);
            NavigationPropertyRestriction restriction = navigation?.RestrictedProperties?.FirstOrDefault(r => r.NavigationProperty == navigationPropertyPath);

            // verify using individual first
            if (restriction != null && restriction.Navigability != null && restriction.Navigability.Value == NavigationType.None)
            {
                return;
            }

            if (restriction == null || restriction.Navigability == null)
            {
                // if the individual has not navigability setting, use the global navigability setting
                if (navigation != null && navigation.Navigability != null && navigation.Navigability.Value == NavigationType.None)
                {
                    // Default navigability for all navigation properties of the annotation target.
                    // Individual navigation properties can override this value via `RestrictedProperties/Navigability`.
                    return;
                }
            }

            // So far, we only consider the non-containment
            Debug.Assert(!NavigationProperty.ContainsTarget);

            // Create the ref
            if (NavigationProperty.TargetMultiplicity() == EdmMultiplicity.Many)
            {
                ODataSegment penultimateSegment = Path.Segments.Reverse().Skip(1).First();
                if (penultimateSegment is ODataKeySegment)
                {
                    // Collection-valued: DELETE ~/entityset/{key}/collection-valued-Nav/{key}/$ref
                    AddDeleteOperation(item, restriction);
                }
                else
                {
                    AddReadOperation(item, restriction);
                    AddInsertOperation(item, restriction);
                }
            }
            else
            {
                AddReadOperation(item, restriction);
                AddUpdateOperation(item, restriction);
                AddDeleteOperation(item, restriction);
            }
        }