/// <summary>
        /// Deserializes the navigation property from <paramref name="navigationLinkWrapper"/> into <paramref name="entityResource"/>.
        /// </summary>
        /// <param name="entityResource">The object into which the navigation property should be read.</param>
        /// <param name="navigationLinkWrapper">The navigation link.</param>
        /// <param name="entityType">The entity type of the entity resource.</param>
        /// <param name="readContext">The deserializer context.</param>
        public virtual void ApplyNavigationProperty(object entityResource, ODataNavigationLinkWithItems navigationLinkWrapper,
             IEdmEntityTypeReference entityType, ODataDeserializerContext readContext)
        {
            if (navigationLinkWrapper == null)
            {
                throw Error.ArgumentNull("navigationLinkWrapper");
            }

            if (entityResource == null)
            {
                throw Error.ArgumentNull("entityResource");
            }

            IEdmNavigationProperty navigationProperty = entityType.FindProperty(navigationLinkWrapper.NavigationLink.Name) as IEdmNavigationProperty;
            if (navigationProperty == null)
            {
                throw new ODataException(
                    Error.Format(SRResources.NavigationPropertyNotfound, navigationLinkWrapper.NavigationLink.Name, entityType.FullName()));
            }

            foreach (ODataItemBase childItem in navigationLinkWrapper.NestedItems)
            {
                ODataEntityReferenceLinkBase entityReferenceLink = childItem as ODataEntityReferenceLinkBase;
                if (entityReferenceLink != null)
                {
                    // ignore links.
                    continue;
                }

                ODataFeedWithEntries feed = childItem as ODataFeedWithEntries;
                if (feed != null)
                {
                    ApplyFeedInNavigationProperty(navigationProperty, entityResource, feed, readContext);
                    continue;
                }

                // It must be entry by now.
                ODataEntryWithNavigationLinks entry = (ODataEntryWithNavigationLinks)childItem;
                if (entry != null)
                {
                    ApplyEntryInNavigationProperty(navigationProperty, entityResource, entry, readContext);
                }
            }
        }
        /// <summary>
        /// Reads an ODataFeed or an ODataItem from the reader.
        /// </summary>
        /// <param name="reader">The OData reader to read from.</param>
        /// <returns>The read feed or entry.</returns>
        public static ODataItemBase ReadEntryOrFeed(ODataReader reader)
        {
            if (reader == null)
            {
                throw Error.ArgumentNull("odataReader");
            }

            ODataItemBase topLevelItem = null;
            Stack<ODataItemBase> itemsStack = new Stack<ODataItemBase>();

            while (reader.Read())
            {
                switch (reader.State)
                {
                    case ODataReaderState.EntryStart:
                        ODataEntry entry = (ODataEntry)reader.Item;
                        ODataEntryWithNavigationLinks entryWrapper = null;
                        if (entry != null)
                        {
                            entryWrapper = new ODataEntryWithNavigationLinks(entry);
                        }

                        if (itemsStack.Count == 0)
                        {
                            Contract.Assert(entry != null, "The top-level entry can never be null.");
                            topLevelItem = entryWrapper;
                        }
                        else
                        {
                            ODataItemBase parentItem = itemsStack.Peek();
                            ODataFeedWithEntries parentFeed = parentItem as ODataFeedWithEntries;
                            if (parentFeed != null)
                            {
                                parentFeed.Entries.Add(entryWrapper);
                            }
                            else
                            {
                                ODataNavigationLinkWithItems parentNavigationLink = (ODataNavigationLinkWithItems)parentItem;
                                Contract.Assert(parentNavigationLink.NavigationLink.IsCollection == false, "Only singleton navigation properties can contain entry as their child.");
                                Contract.Assert(parentNavigationLink.NestedItems.Count == 0, "Each navigation property can contain only one entry as its direct child.");
                                parentNavigationLink.NestedItems.Add(entryWrapper);
                            }
                        }
                        itemsStack.Push(entryWrapper);
                        break;

                    case ODataReaderState.EntryEnd:
                        Contract.Assert(itemsStack.Count > 0 && (reader.Item == null || itemsStack.Peek().Item == reader.Item), "The entry which is ending should be on the top of the items stack.");
                        itemsStack.Pop();
                        break;

                    case ODataReaderState.NavigationLinkStart:
                        ODataNavigationLink navigationLink = (ODataNavigationLink)reader.Item;
                        Contract.Assert(navigationLink != null, "Navigation link should never be null.");

                        ODataNavigationLinkWithItems navigationLinkWrapper = new ODataNavigationLinkWithItems(navigationLink);
                        Contract.Assert(itemsStack.Count > 0, "Navigation link can't appear as top-level item.");
                        {
                            ODataEntryWithNavigationLinks parentEntry = (ODataEntryWithNavigationLinks)itemsStack.Peek();
                            parentEntry.NavigationLinks.Add(navigationLinkWrapper);
                        }

                        itemsStack.Push(navigationLinkWrapper);
                        break;

                    case ODataReaderState.NavigationLinkEnd:
                        Contract.Assert(itemsStack.Count > 0 && itemsStack.Peek().Item == reader.Item, "The navigation link which is ending should be on the top of the items stack.");
                        itemsStack.Pop();
                        break;

                    case ODataReaderState.FeedStart:
                        ODataFeed feed = (ODataFeed)reader.Item;
                        Contract.Assert(feed != null, "Feed should never be null.");

                        ODataFeedWithEntries feedWrapper = new ODataFeedWithEntries(feed);
                        if (itemsStack.Count > 0)
                        {
                            ODataNavigationLinkWithItems parentNavigationLink = (ODataNavigationLinkWithItems)itemsStack.Peek();
                            Contract.Assert(parentNavigationLink != null, "this has to be an inner feed. inner feeds always have a navigation link.");
                            Contract.Assert(parentNavigationLink.NavigationLink.IsCollection == true, "Only collection navigation properties can contain feed as their child.");
                            parentNavigationLink.NestedItems.Add(feedWrapper);
                        }
                        else
                        {
                            topLevelItem = feedWrapper;
                        }

                        itemsStack.Push(feedWrapper);
                        break;

                    case ODataReaderState.FeedEnd:
                        Contract.Assert(itemsStack.Count > 0 && itemsStack.Peek().Item == reader.Item, "The feed which is ending should be on the top of the items stack.");
                        itemsStack.Pop();
                        break;

                    case ODataReaderState.EntityReferenceLink:
                        ODataEntityReferenceLink entityReferenceLink = (ODataEntityReferenceLink)reader.Item;
                        Contract.Assert(entityReferenceLink != null, "Entity reference link should never be null.");
                        ODataEntityReferenceLinkBase entityReferenceLinkWrapper = new ODataEntityReferenceLinkBase(entityReferenceLink);

                        Contract.Assert(itemsStack.Count > 0, "Entity reference link should never be reported as top-level item.");
                        {
                            ODataNavigationLinkWithItems parentNavigationLink = (ODataNavigationLinkWithItems)itemsStack.Peek();
                            parentNavigationLink.NestedItems.Add(entityReferenceLinkWrapper);
                        }

                        break;

                    default:
                        Contract.Assert(false, "We should never get here, it means the ODataReader reported a wrong state.");
                        break;
                }
            }

            Contract.Assert(reader.State == ODataReaderState.Completed, "We should have consumed all of the input by now.");
            Contract.Assert(topLevelItem != null, "A top level entry or feed should have been read by now.");
            return topLevelItem;
        }
        public void ApplyNavigationProperty_UsesThePropertyAlias_ForFeed()
        {
            // Arrange
            CustomersModelWithInheritance model = new CustomersModelWithInheritance();
            model.Model.SetAnnotationValue(model.Customer, new ClrTypeAnnotation(typeof(Customer)));
            model.Model.SetAnnotationValue(model.Order, new ClrTypeAnnotation(typeof(Order)));
            model.Model.SetAnnotationValue(
                model.Customer.FindProperty("Orders"),
                new ClrPropertyInfoAnnotation(typeof(Customer).GetProperty("AliasedOrders")));
            ODataFeedWithEntries feedWrapper = new ODataFeedWithEntries(new ODataFeed());
            feedWrapper.Entries.Add(new ODataEntryWithNavigationLinks(
                new ODataEntry { Properties = new[] { new ODataProperty { Name = "ID", Value = 42 } } }));

            Customer customer = new Customer();
            ODataNavigationLinkWithItems navLink =
                new ODataNavigationLinkWithItems(new ODataNavigationLink { Name = "Orders" });
            navLink.NestedItems.Add(feedWrapper);

            ODataDeserializerContext context = new ODataDeserializerContext { Model = model.Model };

            // Act
            new ODataEntityDeserializer(_deserializerProvider)
                .ApplyNavigationProperty(customer, navLink, model.Customer.AsReference(), context);

            // Assert
            Assert.Equal(1, customer.AliasedOrders.Count());
            Assert.Equal(42, customer.AliasedOrders[0].ID);
        }
        public void ApplyNavigationProperty_UsesThePropertyAlias_ForEntry()
        {
            // Arrange
            CustomersModelWithInheritance model = new CustomersModelWithInheritance();
            model.Model.SetAnnotationValue(model.Customer, new ClrTypeAnnotation(typeof(Customer)));
            model.Model.SetAnnotationValue(model.Order, new ClrTypeAnnotation(typeof(Order)));
            model.Model.SetAnnotationValue(
                model.Order.FindProperty("Customer"),
                new ClrPropertyInfoAnnotation(typeof(Order).GetProperty("AliasedCustomer")));
            ODataEntry entry = new ODataEntry { Properties = new[] { new ODataProperty { Name = "ID", Value = 42 } } };

            Order order = new Order();
            ODataNavigationLinkWithItems navLink =
                new ODataNavigationLinkWithItems(new ODataNavigationLink { Name = "Customer" });
            navLink.NestedItems.Add(new ODataEntryWithNavigationLinks(entry));

            ODataDeserializerContext context = new ODataDeserializerContext { Model = model.Model };

            // Act
            new ODataEntityDeserializer(_deserializerProvider)
                .ApplyNavigationProperty(order, navLink, model.Order.AsReference(), context);

            // Assert
            Assert.Equal(order.AliasedCustomer.ID, 42);
        }
        public void ApplyNavigationProperty_Calls_ReadInlineOnEntry()
        {
            // Arrange
            Mock<ODataEdmTypeDeserializer> supplierDeserializer = new Mock<ODataEdmTypeDeserializer>(ODataPayloadKind.Feed);
            Mock<ODataDeserializerProvider> deserializerProvider = new Mock<ODataDeserializerProvider>();
            var deserializer = new ODataEntityDeserializer(deserializerProvider.Object);
            ODataNavigationLinkWithItems navigationLink = new ODataNavigationLinkWithItems(new ODataNavigationLink { Name = "Supplier" });
            navigationLink.NestedItems.Add(new ODataEntryWithNavigationLinks(new ODataEntry()));

            Product product = new Product();
            Supplier supplier = new Supplier { ID = 42 };

            deserializerProvider.Setup(d => d.GetEdmTypeDeserializer(It.IsAny<IEdmTypeReference>())).Returns(supplierDeserializer.Object);
            supplierDeserializer
                .Setup(d => d.ReadInline(navigationLink.NestedItems[0], _productEdmType.FindNavigationProperty("Supplier").Type, _readContext))
                .Returns(supplier).Verifiable();

            // Act
            deserializer.ApplyNavigationProperty(product, navigationLink, _productEdmType, _readContext);

            // Assert
            supplierDeserializer.Verify();
            Assert.Equal(supplier, product.Supplier);
        }
        public void ApplyNavigationProperty_Calls_ReadInlineOnFeed()
        {
            // Arrange
            IEdmCollectionTypeReference productsType = new EdmCollectionTypeReference(new EdmCollectionType(_productEdmType));
            Mock<ODataEdmTypeDeserializer> productsDeserializer = new Mock<ODataEdmTypeDeserializer>(ODataPayloadKind.Feed);
            Mock<ODataDeserializerProvider> deserializerProvider = new Mock<ODataDeserializerProvider>();
            var deserializer = new ODataEntityDeserializer(deserializerProvider.Object);
            ODataNavigationLinkWithItems navigationLink = new ODataNavigationLinkWithItems(new ODataNavigationLink { Name = "Products" });
            navigationLink.NestedItems.Add(new ODataFeedWithEntries(new ODataFeed()));

            Supplier supplier = new Supplier();
            IEnumerable products = new[] { new Product { ID = 42 } };

            deserializerProvider.Setup(d => d.GetEdmTypeDeserializer(It.IsAny<IEdmTypeReference>())).Returns(productsDeserializer.Object);
            productsDeserializer
                .Setup(d => d.ReadInline(navigationLink.NestedItems[0], _supplierEdmType.FindNavigationProperty("Products").Type, _readContext))
                .Returns(products).Verifiable();

            // Act
            deserializer.ApplyNavigationProperty(supplier, navigationLink, _supplierEdmType, _readContext);

            // Assert
            productsDeserializer.Verify();
            Assert.Equal(1, supplier.Products.Count());
            Assert.Equal(42, supplier.Products.First().ID);
        }
        public void ApplyNavigationProperty_ThrowsODataException_WhenPatchingCollectionNavigationProperty()
        {
            var deserializer = new ODataEntityDeserializer(_deserializerProvider);
            ODataNavigationLinkWithItems navigationLink = new ODataNavigationLinkWithItems(new ODataNavigationLink { Name = "Products" });
            navigationLink.NestedItems.Add(new ODataFeedWithEntries(new ODataFeed()));
            _readContext.ResourceType = typeof(Delta<Supplier>);

            Assert.Throws<ODataException>(
                () => deserializer.ApplyNavigationProperty(42, navigationLink, _supplierEdmType, _readContext),
                "Cannot apply PATCH to navigation property 'Products' on entity type 'ODataDemo.Supplier'.");
        }
        public void ApplyNavigationProperty_ThrowsODataException_NavigationPropertyNotfound()
        {
            var deserializer = new ODataEntityDeserializer(_deserializerProvider);
            ODataNavigationLinkWithItems navigationLink = new ODataNavigationLinkWithItems(new ODataNavigationLink { Name = "SomeProperty" });

            Assert.Throws<ODataException>(
                () => deserializer.ApplyNavigationProperty(42, navigationLink, _productEdmType, _readContext),
                "Cannot find navigation property 'SomeProperty' on the entity type 'ODataDemo.Product'.");
        }
 public void ApplyNavigationProperty_ThrowsArgumentNull_EntityResource()
 {
     var deserializer = new ODataEntityDeserializer(_deserializerProvider);
     ODataNavigationLinkWithItems navigationLink = new ODataNavigationLinkWithItems(new ODataNavigationLink());
     Assert.ThrowsArgumentNull(
         () => deserializer.ApplyNavigationProperty(entityResource: null, navigationLinkWrapper: navigationLink,
             entityType: _productEdmType, readContext: _readContext),
         "entityResource");
 }