/// <summary> /// Build the $select item, it maybe $select=complex/abc, $select=abc, $select=nav, etc. /// </summary> /// <param name="pathSelectItem">The expanded reference select item.</param> /// <param name="currentLevelPropertiesInclude">The current properties to include at current level.</param> /// <param name="structuralTypeInfo">The structural type properties.</param> private void BuildSelectItem(PathSelectItem pathSelectItem, IDictionary <IEdmStructuralProperty, SelectExpandIncludedProperty> currentLevelPropertiesInclude, EdmStructuralTypeInfo structuralTypeInfo) { Contract.Assert(pathSelectItem != null && pathSelectItem.SelectedPath != null); Contract.Assert(currentLevelPropertiesInclude != null); Contract.Assert(structuralTypeInfo != null); // Verify and process the $select=abc/xyz/.... ODataSelectPath selectPath = pathSelectItem.SelectedPath; IList <ODataPathSegment> remainingSegments; ODataPathSegment segment = selectPath.GetFirstNonTypeCastSegment(out remainingSegments); PropertySegment firstPropertySegment = segment as PropertySegment; if (firstPropertySegment != null) { if (structuralTypeInfo.IsStructuralPropertyDefined(firstPropertySegment.Property)) { // $select=abc/xyz/... SelectExpandIncludedProperty newPropertySelectItem; if (!currentLevelPropertiesInclude.TryGetValue(firstPropertySegment.Property, out newPropertySelectItem)) { newPropertySelectItem = new SelectExpandIncludedProperty(firstPropertySegment); currentLevelPropertiesInclude[firstPropertySegment.Property] = newPropertySelectItem; } newPropertySelectItem.AddSubSelectItem(remainingSegments, pathSelectItem); } return; } // If the first segment is not a property segment, // that segment must be the last segment, so the remainging segments should be null. Contract.Assert(remainingSegments == null); NavigationPropertySegment navigationSegment = segment as NavigationPropertySegment; if (navigationSegment != null) { // for example: $select=NavigationProperty or $select=NS.VipCustomer/VipNav if (structuralTypeInfo.IsNavigationPropertyDefined(navigationSegment.NavigationProperty)) { if (SelectedNavigationProperties == null) { SelectedNavigationProperties = new HashSet <IEdmNavigationProperty>(); } SelectedNavigationProperties.Add(navigationSegment.NavigationProperty); } return; } OperationSegment operationSegment = segment as OperationSegment; if (operationSegment != null) { // for example: $select=NS.Operation, or, $select=NS.VipCustomer/NS.Operation AddOperations(operationSegment, structuralTypeInfo.AllActions, structuralTypeInfo.AllFunctions); return; } DynamicPathSegment dynamicPathSegment = segment as DynamicPathSegment; if (dynamicPathSegment != null) { if (SelectedDynamicProperties == null) { SelectedDynamicProperties = new HashSet <string>(); } SelectedDynamicProperties.Add(dynamicPathSegment.Identifier); return; } // In fact, we should never be here, because it's verified above throw new ODataException(Error.Format(SRResources.SelectionTypeNotSupported, segment.GetType().Name)); }
/// <summary> /// Build the $expand item, it maybe $expand=nav, $expand=complex/nav, $expand=nav/$ref, etc. /// </summary> /// <param name="expandReferenceItem">The expanded reference select item.</param> /// <param name="currentLevelPropertiesInclude">The current properties to include at current level.</param> /// <param name="structuralTypeInfo">The structural type properties.</param> private void BuildExpandItem(ExpandedReferenceSelectItem expandReferenceItem, IDictionary <IEdmStructuralProperty, SelectExpandIncludedProperty> currentLevelPropertiesInclude, EdmStructuralTypeInfo structuralTypeInfo) { Contract.Assert(expandReferenceItem != null && expandReferenceItem.PathToNavigationProperty != null); Contract.Assert(currentLevelPropertiesInclude != null); Contract.Assert(structuralTypeInfo != null); // Verify and process the $expand=abc/xyz/nav. ODataExpandPath expandPath = expandReferenceItem.PathToNavigationProperty; IList <ODataPathSegment> remainingSegments; ODataPathSegment segment = expandPath.GetFirstNonTypeCastSegment(out remainingSegments); PropertySegment firstPropertySegment = segment as PropertySegment; if (firstPropertySegment != null) { // for example: $expand=abc/xyz/nav, the remaining segment can't be null // because at least the last navigation property segment is there. Contract.Assert(remainingSegments != null); if (structuralTypeInfo.IsStructuralPropertyDefined(firstPropertySegment.Property)) { SelectExpandIncludedProperty newPropertySelectItem; if (!currentLevelPropertiesInclude.TryGetValue(firstPropertySegment.Property, out newPropertySelectItem)) { newPropertySelectItem = new SelectExpandIncludedProperty(firstPropertySegment); currentLevelPropertiesInclude[firstPropertySegment.Property] = newPropertySelectItem; } newPropertySelectItem.AddSubExpandItem(remainingSegments, expandReferenceItem); } } else { // for example: $expand=nav, or $expand=NS.SubType/nav, the navigation property segment should be the last segment. // So, the remaining segments should be null. Contract.Assert(remainingSegments == null); NavigationPropertySegment firstNavigationSegment = segment as NavigationPropertySegment; Contract.Assert(firstNavigationSegment != null); if (structuralTypeInfo.IsNavigationPropertyDefined(firstNavigationSegment.NavigationProperty)) { // It's not allowed to have mulitple navigation expanded or referenced. // for example: "$expand=nav($top=2),nav($skip=3)" is not allowed and will be merged (or throw exception) at ODL side. ExpandedNavigationSelectItem expanded = expandReferenceItem as ExpandedNavigationSelectItem; if (expanded != null) { if (ExpandedProperties == null) { ExpandedProperties = new Dictionary <IEdmNavigationProperty, ExpandedNavigationSelectItem>(); } ExpandedProperties[firstNavigationSegment.NavigationProperty] = expanded; } else { // $expand=..../nav/$ref if (ReferencedProperties == null) { ReferencedProperties = new Dictionary <IEdmNavigationProperty, ExpandedReferenceSelectItem>(); } ReferencedProperties[firstNavigationSegment.NavigationProperty] = expandReferenceItem; } } } }