private static ODataPath CreatePath(ODataPath parentPath, ODataExpandPath pathToNavigationProperty)
{
var segments = new List <ODataPathSegment>(parentPath);
segments.AddRange(pathToNavigationProperty);
return(new ODataPath(segments));
}
public void GetFirstNonTypeCastSegment_WorksForExpandPathWithPropertySegment()
{
// Arrange
EdmEntityType entityType = new EdmEntityType("NS", "Customer");
IEdmStructuralProperty property = entityType.AddStructuralProperty("Id", EdmPrimitiveTypeKind.String);
var navProperty = entityType.AddUnidirectionalNavigation(new EdmNavigationPropertyInfo
{
Name = "Nav",
Target = entityType,
TargetMultiplicity = EdmMultiplicity.One
});
EdmEntityContainer container = new EdmEntityContainer("NS", "Container");
EdmEntitySet set = new EdmEntitySet(container, "set", entityType);
NavigationPropertySegment navSegment = new NavigationPropertySegment(navProperty, set);
TypeSegment typeSegment = new TypeSegment(entityType, null);
ODataPathSegment propertySegment = new PropertySegment(property);
ODataExpandPath expandPath = new ODataExpandPath(typeSegment, propertySegment, navSegment);
// Act
IList <ODataPathSegment> remainingSegments;
ODataPathSegment firstNonTypeSegment = expandPath.GetFirstNonTypeCastSegment(out remainingSegments);
// Assert
Assert.NotNull(firstNonTypeSegment);
Assert.Same(propertySegment, firstNonTypeSegment);
Assert.NotNull(remainingSegments);
Assert.Same(navSegment, Assert.Single(remainingSegments));
}
private static IEnumerable <SelectItem> GetAutoExpandedNavigationSelectItems(
IEdmEntityType baseEntityType,
IEdmModel model,
string alreadyExpandedNavigationSourceName,
IEdmNavigationSource navigationSource,
bool isAllSelected,
bool searchDerivedTypeWhenAutoExpand)
{
var expandItems = new List <SelectItem>();
var autoExpandNavigationProperties = EdmLibHelpers.GetAutoExpandNavigationProperties(baseEntityType, model,
searchDerivedTypeWhenAutoExpand);
foreach (var navigationProperty in autoExpandNavigationProperties)
{
if (!alreadyExpandedNavigationSourceName.Equals(navigationProperty.Name))
{
IEdmEntityType entityType = navigationProperty.DeclaringEntityType();
IEdmNavigationSource currentEdmNavigationSource =
navigationSource.FindNavigationTarget(navigationProperty);
if (currentEdmNavigationSource != null)
{
List <ODataPathSegment> pathSegments = new List <ODataPathSegment>()
{
new NavigationPropertySegment(navigationProperty, currentEdmNavigationSource)
};
ODataExpandPath expandPath = new ODataExpandPath(pathSegments);
SelectExpandClause selectExpandClause = new SelectExpandClause(new List <SelectItem>(),
true);
ExpandedNavigationSelectItem item = new ExpandedNavigationSelectItem(expandPath,
currentEdmNavigationSource, selectExpandClause);
if (!currentEdmNavigationSource.EntityType().Equals(entityType))
{
IEnumerable <SelectItem> nestedSelectItems = GetAutoExpandedNavigationSelectItems(
currentEdmNavigationSource.EntityType(),
model,
alreadyExpandedNavigationSourceName,
item.NavigationSource,
true,
searchDerivedTypeWhenAutoExpand);
selectExpandClause = new SelectExpandClause(nestedSelectItems, true);
item = new ExpandedNavigationSelectItem(expandPath, currentEdmNavigationSource,
selectExpandClause);
}
expandItems.Add(item);
if (!isAllSelected)
{
PathSelectItem pathSelectItem = new PathSelectItem(
new ODataSelectPath(pathSegments));
expandItems.Add(pathSelectItem);
}
}
}
}
return(expandItems);
}
public void GetFirstNonTypeCastSegment_ExpandPath_ThrowsArgumentNull()
{
// Arrange & Act
ODataExpandPath expandPath = null;
IList <ODataPathSegment> remainingSegments;
// Assert
ExceptionAssert.ThrowsArgumentNull(() => expandPath.GetFirstNonTypeCastSegment(out remainingSegments), "expandPath");
}
private SelectExpandClause BuildSelectExpandClause(IEdmEntitySet entitySet, GraphQLSelectionSet selectionSet)
{
var selectItems = new List <SelectItem>();
foreach (ASTNode astNode in selectionSet.Selections)
{
if (astNode is GraphQLFieldSelection fieldSelection)
{
IEdmProperty edmProperty = FindEdmProperty(entitySet.EntityType(), fieldSelection.Name.Value);
if (fieldSelection.SelectionSet == null)
{
var structuralProperty = (IEdmStructuralProperty)edmProperty;
selectItems.Add(new PathSelectItem(new ODataSelectPath(new PropertySegment(structuralProperty))));
}
else
{
var navigationProperty = (IEdmNavigationProperty)edmProperty;
IEdmEntitySet parentEntitySet;
if (navigationProperty.ContainsTarget)
{
ModelBuilder.ManyToManyJoinDescription joinDescription = _edmModel.GetManyToManyJoinDescription(navigationProperty);
parentEntitySet = OeEdmClrHelper.GetEntitySet(_edmModel, joinDescription.TargetNavigationProperty);
}
else
{
parentEntitySet = OeEdmClrHelper.GetEntitySet(_edmModel, navigationProperty);
}
var expandPath = new ODataExpandPath(new NavigationPropertySegment(navigationProperty, parentEntitySet));
FilterClause filterOption = null;
if (fieldSelection.Arguments.Any())
{
filterOption = BuildFilterClause(parentEntitySet, fieldSelection);
}
SelectExpandClause childSelectExpand = BuildSelectExpandClause(parentEntitySet, fieldSelection.SelectionSet);
var expandedSelectItem = new ExpandedNavigationSelectItem(expandPath, parentEntitySet, childSelectExpand, filterOption, null, null, null, null, null, null);
selectItems.Add(expandedSelectItem);
}
}
else
{
throw new NotSupportedException("selection " + astNode.GetType().Name + " not supported");
}
}
return(new SelectExpandClause(selectItems, false));
}
/// <summary>
/// Verify the $expand path and gets the first non type cast segment in this expand path.
/// For example: $expand=NS.SubType1/abc/NS.SubType2/nav
/// => firstPropertySegment: "abc"
/// => remainingSegments: NS.SubType2/nav
/// => leadingTypeSegment: NS.SubType1
/// </summary>
/// <param name="expandPath">The input $expand path.</param>
/// <param name="remainingSegments">The remaining segments after the first non type segment.</param>
/// <returns>First non-type cast segment.</returns>
public static ODataPathSegment GetFirstNonTypeCastSegment(this ODataExpandPath expandPath,
out IList <ODataPathSegment> remainingSegments)
{
if (expandPath == null)
{
throw new ArgumentNullException(nameof(expandPath));
}
// In fact, ODataExpandPath constructor verifies the supporting segments, we add the verification here for double check.
return(GetFirstNonTypeCastSegment(expandPath,
//The middle segment should be "TypeSegment" or "PropertySegment".
m => m is PropertySegment || m is TypeSegment,
// The last segment could be "NavigationPropertySegment"
s => s is NavigationPropertySegment,
out remainingSegments));
}
private SelectExpandClause BuildSelectExpandClause(IEdmEntitySet entitySet, GraphQLSelectionSet selectionSet)
{
var selectItems = new List <SelectItem>();
foreach (ASTNode astNode in selectionSet.Selections)
{
if (astNode is GraphQLFieldSelection fieldSelection)
{
IEdmProperty edmProperty = FindEdmProperty(entitySet.EntityType(), fieldSelection.Name.Value);
if (fieldSelection.SelectionSet == null)
{
var structuralProperty = (IEdmStructuralProperty)edmProperty;
selectItems.Add(new PathSelectItem(new ODataSelectPath(new PropertySegment(structuralProperty))));
}
else
{
IEdmType edmType = edmProperty.Type.Definition;
if (edmType is IEdmCollectionType collectionType)
{
edmType = collectionType.ElementType.Definition;
}
IEdmEntitySet parentEntitySet = OeEdmClrHelper.GetEntitySet(_edmModel, edmType);
SelectExpandClause childSelectExpand = BuildSelectExpandClause(parentEntitySet, fieldSelection.SelectionSet);
var navigationProperty = (IEdmNavigationProperty)edmProperty;
IEdmEntitySet navigationSource = OeEdmClrHelper.GetEntitySet(_edmModel, navigationProperty.Type.Definition);
var expandPath = new ODataExpandPath(new NavigationPropertySegment(navigationProperty, navigationSource));
FilterClause filterOption = null;
if (fieldSelection.Arguments.Any())
{
filterOption = BuildFilterClause(parentEntitySet, fieldSelection);
}
var expandedSelectItem = new ExpandedNavigationSelectItem(expandPath, navigationSource, childSelectExpand, filterOption, null, null, null, null, null, null);
selectItems.Add(expandedSelectItem);
}
}
else
{
throw new NotSupportedException("selection " + astNode.GetType().Name + " not supported");
}
}
return(new SelectExpandClause(selectItems, false));
}
/// <summary>
/// Add sub $expand item for this include property.
/// </summary>
/// <param name="remainingSegments">The remaining segments star from this include property.</param>
/// <param name="oldRefItem">The old $expand item.</param>
public void AddSubExpandItem(IList <ODataPathSegment> remainingSegments, ExpandedReferenceSelectItem oldRefItem)
{
// remainingSegments should never be null, because at least a navigation property segment in it.
Contract.Assert(remainingSegments != null);
if (_subSelectItems == null)
{
_subSelectItems = new List <SelectItem>();
}
ODataExpandPath newPath = new ODataExpandPath(remainingSegments);
ExpandedNavigationSelectItem expandedNav = oldRefItem as ExpandedNavigationSelectItem;
if (expandedNav != null)
{
_subSelectItems.Add(new ExpandedNavigationSelectItem(newPath,
expandedNav.NavigationSource,
expandedNav.SelectAndExpand,
expandedNav.FilterOption,
expandedNav.OrderByOption,
expandedNav.TopOption,
expandedNav.SkipOption,
expandedNav.CountOption,
expandedNav.SearchOption,
expandedNav.LevelsOption,
expandedNav.ComputeOption,
expandedNav.ApplyOption));
}
else
{
_subSelectItems.Add(new ExpandedReferenceSelectItem(newPath,
oldRefItem.NavigationSource,
oldRefItem.FilterOption,
oldRefItem.OrderByOption,
oldRefItem.TopOption,
oldRefItem.SkipOption,
oldRefItem.CountOption,
oldRefItem.SearchOption,
oldRefItem.ComputeOption,
oldRefItem.ApplyOption));
}
}
public ExpandDepthAndCountValidatorTests()
{
this.emptyTree = new SelectExpandClause(new SelectItem[0], true);
var pathToMyDog = new ODataExpandPath(new NavigationPropertySegment(HardCodedTestModel.GetPersonMyDogNavProp(), HardCodedTestModel.GetDogsSet()));
this.treeWithDepth1 = new SelectExpandClause(new[] { new ExpandedNavigationSelectItem(pathToMyDog, HardCodedTestModel.GetDogsSet(), this.emptyTree) }, true);
var pathToPerson = new ODataExpandPath(new NavigationPropertySegment(HardCodedTestModel.GetDogMyPeopleNavProp(), HardCodedTestModel.GetPeopleSet()));
this.treeWithDepth2 = new SelectExpandClause(new[] { new ExpandedNavigationSelectItem(pathToPerson, HardCodedTestModel.GetPeopleSet(), this.treeWithDepth1) }, true);
var pathToLions = new ODataExpandPath(new NavigationPropertySegment(HardCodedTestModel.GetPersonMyLionsNavProp(), HardCodedTestModel.GetLionSet()));
this.treeWithWidth2 = new SelectExpandClause(new[] { new ExpandedNavigationSelectItem(pathToMyDog, HardCodedTestModel.GetDogsSet(), this.emptyTree), new ExpandedNavigationSelectItem(pathToLions, HardCodedTestModel.GetLionSet(), this.emptyTree) }, true);
this.treeWithDepthAndWidth2WithRepeatedParent = new SelectExpandClause(new[] { new ExpandedNavigationSelectItem(pathToPerson, HardCodedTestModel.GetPeopleSet(), this.treeWithWidth2) }, true);
var pathToPaintings = new ODataExpandPath(new NavigationPropertySegment(HardCodedTestModel.GetPersonMyPaintingsNavProp(), HardCodedTestModel.GetPaintingsSet()));
this.bigComplexTree = new SelectExpandClause(new[] {
new ExpandedNavigationSelectItem(pathToMyDog, HardCodedTestModel.GetDogsSet(), this.treeWithDepthAndWidth2WithRepeatedParent),
new ExpandedNavigationSelectItem(pathToLions, HardCodedTestModel.GetLionSet(), this.emptyTree),
new ExpandedNavigationSelectItem(pathToPaintings, HardCodedTestModel.GetPaintingsSet(), this.emptyTree)
}, true);
}
/// <summary>
/// Generate an expand item (and a select item for the implicit nav prop if necessary) based on an ExpandTermToken
/// </summary>
/// <param name="tokenIn">the expandTerm token to visit</param>
/// <returns>the expand item for this expand term token.</returns>
private SelectItem GenerateExpandItem(ExpandTermToken tokenIn)
{
ExceptionUtils.CheckArgumentNotNull(tokenIn, "tokenIn");
// ensure that we're always dealing with proper V4 syntax
if (tokenIn.PathToNavProp.NextToken != null && !tokenIn.PathToNavProp.IsNamespaceOrContainerQualified())
{
if (tokenIn.PathToNavProp.NextToken.Identifier != UriQueryConstants.RefSegment || tokenIn.PathToNavProp.NextToken.NextToken != null)
{
throw new ODataException(ODataErrorStrings.ExpandItemBinder_TraversingMultipleNavPropsInTheSamePath);
}
}
PathSegmentToken currentToken = tokenIn.PathToNavProp;
IEdmStructuredType currentLevelEntityType = this.EdmType;
List <ODataPathSegment> pathSoFar = new List <ODataPathSegment>();
PathSegmentToken firstNonTypeToken = currentToken;
if (currentToken.IsNamespaceOrContainerQualified())
{
pathSoFar.AddRange(SelectExpandPathBinder.FollowTypeSegments(currentToken, this.Model, this.Settings.SelectExpandLimit, this.configuration.Resolver, ref currentLevelEntityType, out firstNonTypeToken));
}
IEdmProperty edmProperty = this.configuration.Resolver.ResolveProperty(currentLevelEntityType, firstNonTypeToken.Identifier);
if (edmProperty == null)
{
throw new ODataException(ODataErrorStrings.MetadataBinder_PropertyNotDeclared(currentLevelEntityType.FullTypeName(), currentToken.Identifier));
}
IEdmNavigationProperty currentNavProp = edmProperty as IEdmNavigationProperty;
if (currentNavProp == null)
{
throw new ODataException(ODataErrorStrings.ExpandItemBinder_PropertyIsNotANavigationProperty(currentToken.Identifier, currentLevelEntityType.FullTypeName()));
}
bool isRef = false;
if (firstNonTypeToken.NextToken != null)
{
// lastly... make sure that, since we're on a NavProp, that the next token isn't null.
if (firstNonTypeToken.NextToken.Identifier == UriQueryConstants.RefSegment)
{
isRef = true;
}
else
{
throw new ODataException(ODataErrorStrings.ExpandItemBinder_TraversingMultipleNavPropsInTheSamePath);
}
}
pathSoFar.Add(new NavigationPropertySegment(currentNavProp, /*entitySet*/ null));
ODataExpandPath pathToNavProp = new ODataExpandPath(pathSoFar);
IEdmNavigationSource targetNavigationSource = null;
if (this.NavigationSource != null)
{
targetNavigationSource = this.NavigationSource.FindNavigationTarget(currentNavProp);
}
// call MetadataBinder to build the filter clause
FilterClause filterOption = null;
if (tokenIn.FilterOption != null)
{
MetadataBinder binder = this.BuildNewMetadataBinder(targetNavigationSource);
FilterBinder filterBinder = new FilterBinder(binder.Bind, binder.BindingState);
filterOption = filterBinder.BindFilter(tokenIn.FilterOption);
}
// call MetadataBinder again to build the orderby clause
OrderByClause orderbyOption = null;
if (tokenIn.OrderByOptions != null)
{
MetadataBinder binder = this.BuildNewMetadataBinder(targetNavigationSource);
OrderByBinder orderByBinder = new OrderByBinder(binder.Bind);
orderbyOption = orderByBinder.BindOrderBy(binder.BindingState, tokenIn.OrderByOptions);
}
SearchClause searchOption = null;
if (tokenIn.SearchOption != null)
{
MetadataBinder binder = this.BuildNewMetadataBinder(targetNavigationSource);
SearchBinder searchBinder = new SearchBinder(binder.Bind);
searchOption = searchBinder.BindSearch(tokenIn.SearchOption);
}
if (isRef)
{
return(new ExpandedReferenceSelectItem(pathToNavProp, targetNavigationSource, filterOption, orderbyOption, tokenIn.TopOption, tokenIn.SkipOption, tokenIn.CountQueryOption, searchOption));
}
SelectExpandClause subSelectExpand;
if (tokenIn.ExpandOption != null)
{
subSelectExpand = this.GenerateSubExpand(currentNavProp, tokenIn);
}
else
{
subSelectExpand = BuildDefaultSubExpand();
}
subSelectExpand = this.DecorateExpandWithSelect(subSelectExpand, currentNavProp, tokenIn.SelectOption);
LevelsClause levelsOption = this.ParseLevels(tokenIn.LevelsOption, currentLevelEntityType, currentNavProp);
return(new ExpandedNavigationSelectItem(pathToNavProp, targetNavigationSource, subSelectExpand, filterOption, orderbyOption, tokenIn.TopOption, tokenIn.SkipOption, tokenIn.CountQueryOption, searchOption, levelsOption));
}
/// <summary>
/// Generate an expand item based on an ExpandTermToken
/// </summary>
/// <param name="tokenIn">the expandTerm token to visit</param>
/// <returns>the expand item for this expand term token.</returns>
private ExpandedNavigationSelectItem GenerateExpandItem(ExpandTermToken tokenIn)
{
ExceptionUtils.CheckArgumentNotNull(tokenIn, "tokenIn");
// ensure that we're always dealing with a normalized tree
if (tokenIn.PathToNavProp.NextToken != null && !tokenIn.PathToNavProp.IsNamespaceOrContainerQualified())
{
throw new ODataException(ODataErrorStrings.ExpandItemBinder_TraversingANonNormalizedTree);
}
PathSegmentToken currentToken = tokenIn.PathToNavProp;
IEdmEntityType currentLevelEntityType = this.entityType;
List <ODataPathSegment> pathSoFar = new List <ODataPathSegment>();
PathSegmentToken firstNonTypeToken = currentToken;
if (currentToken.IsNamespaceOrContainerQualified())
{
pathSoFar.AddRange(SelectExpandPathBinder.FollowTypeSegments(currentToken, this.Model, this.Settings.SelectExpandLimit, ref currentLevelEntityType, out firstNonTypeToken));
}
IEdmProperty edmProperty = currentLevelEntityType.FindProperty(firstNonTypeToken.Identifier);
if (edmProperty == null)
{
throw new ODataException(ODataErrorStrings.MetadataBinder_PropertyNotDeclared(currentLevelEntityType.FullName(), currentToken.Identifier));
}
IEdmNavigationProperty currentNavProp = edmProperty as IEdmNavigationProperty;
if (currentNavProp == null)
{
// the server allowed non-navigation, non-stream properties to be expanded, but then ignored them.
if (this.Settings.UseWcfDataServicesServerBehavior && !edmProperty.Type.IsStream())
{
return(null);
}
throw new ODataException(ODataErrorStrings.ExpandItemBinder_PropertyIsNotANavigationProperty(currentToken.Identifier, currentLevelEntityType.FullName()));
}
pathSoFar.Add(new NavigationPropertySegment(currentNavProp, /*entitySet*/ null));
ODataExpandPath pathToNavProp = new ODataExpandPath(pathSoFar);
SelectExpandClause subSelectExpand;
if (tokenIn.ExpandOption != null)
{
subSelectExpand = this.GenerateSubExpand(currentNavProp, tokenIn);
}
else
{
subSelectExpand = BuildDefaultSubExpand();
}
subSelectExpand = this.DecorateExpandWithSelect(subSelectExpand, currentNavProp, tokenIn.SelectOption);
IEdmEntitySet targetEntitySet = null;
if (this.entitySet != null)
{
targetEntitySet = this.entitySet.FindNavigationTarget(currentNavProp);
}
// call MetadataBinder to build the filter clause
FilterClause filterOption = null;
if (tokenIn.FilterOption != null)
{
MetadataBinder binder = this.BuildNewMetadataBinder(targetEntitySet);
FilterBinder filterBinder = new FilterBinder(binder.Bind, binder.BindingState);
filterOption = filterBinder.BindFilter(tokenIn.FilterOption);
}
// call MetadataBinder again to build the orderby clause
OrderByClause orderbyOption = null;
if (tokenIn.OrderByOption != null)
{
MetadataBinder binder = this.BuildNewMetadataBinder(targetEntitySet);
OrderByBinder orderByBinder = new OrderByBinder(binder.Bind);
orderbyOption = orderByBinder.BindOrderBy(binder.BindingState, new OrderByToken[] { tokenIn.OrderByOption });
}
return(new ExpandedNavigationSelectItem(pathToNavProp, targetEntitySet, filterOption, orderbyOption, tokenIn.TopOption, tokenIn.SkipOption, tokenIn.InlineCountOption, subSelectExpand));
}
private void GetAutoSelectExpandItems(
IEdmEntityType baseEntityType,
IEdmModel model,
IEdmNavigationSource navigationSource,
bool isAllSelected,
ModelBoundQuerySettings modelBoundQuerySettings,
int depth,
out List <SelectItem> autoSelectItems,
out List <SelectItem> autoExpandItems)
{
autoSelectItems = new List <SelectItem>();
var autoSelectProperties = EdmLibHelpers.GetAutoSelectProperties(null,
baseEntityType, model, modelBoundQuerySettings);
foreach (var autoSelectProperty in autoSelectProperties)
{
List <ODataPathSegment> pathSegments = new List <ODataPathSegment>()
{
new PropertySegment(autoSelectProperty)
};
PathSelectItem pathSelectItem = new PathSelectItem(
new ODataSelectPath(pathSegments));
autoSelectItems.Add(pathSelectItem);
}
autoExpandItems = new List <SelectItem>();
depth--;
if (depth < 0)
{
return;
}
var autoExpandNavigationProperties = EdmLibHelpers.GetAutoExpandNavigationProperties(null, baseEntityType,
model, !isAllSelected, modelBoundQuerySettings);
foreach (var navigationProperty in autoExpandNavigationProperties)
{
IEdmNavigationSource currentEdmNavigationSource =
navigationSource.FindNavigationTarget(navigationProperty);
if (currentEdmNavigationSource != null)
{
List <ODataPathSegment> pathSegments = new List <ODataPathSegment>()
{
new NavigationPropertySegment(navigationProperty, currentEdmNavigationSource)
};
ODataExpandPath expandPath = new ODataExpandPath(pathSegments);
SelectExpandClause selectExpandClause = new SelectExpandClause(new List <SelectItem>(),
true);
ExpandedNavigationSelectItem item = new ExpandedNavigationSelectItem(expandPath,
currentEdmNavigationSource, selectExpandClause);
modelBoundQuerySettings = EdmLibHelpers.GetModelBoundQuerySettings(navigationProperty,
navigationProperty.ToEntityType(), model);
List <SelectItem> nestedSelectItems;
List <SelectItem> nestedExpandItems;
int maxExpandDepth = GetMaxExpandDepth(modelBoundQuerySettings, navigationProperty.Name);
if (maxExpandDepth != 0 && maxExpandDepth < depth)
{
depth = maxExpandDepth;
}
GetAutoSelectExpandItems(
currentEdmNavigationSource.EntityType(),
model,
item.NavigationSource,
true,
modelBoundQuerySettings,
depth,
out nestedSelectItems,
out nestedExpandItems);
selectExpandClause = new SelectExpandClause(nestedSelectItems.Concat(nestedExpandItems),
nestedSelectItems.Count == 0);
item = new ExpandedNavigationSelectItem(expandPath, currentEdmNavigationSource,
selectExpandClause);
autoExpandItems.Add(item);
if (!isAllSelected || autoSelectProperties.Count() != 0)
{
PathSelectItem pathSelectItem = new PathSelectItem(
new ODataSelectPath(pathSegments));
autoExpandItems.Add(pathSelectItem);
}
}
}
}
private void GetAutoSelectExpandItems(IEdmEntityType baseEntityType, IEdmModel model, IEdmNavigationSource navigationSource, bool isAllSelected,
ModelBoundQuerySettings modelBoundQuerySettings, int depth, out List <SelectItem> autoSelectItems, out List <SelectItem> autoExpandItems)
{
autoSelectItems = new List <SelectItem>();
autoExpandItems = new List <SelectItem>();
if (baseEntityType == null)
{
return;
}
IList <SelectModelPath> autoSelectProperties = model.GetAutoSelectPaths(baseEntityType, null, modelBoundQuerySettings);
foreach (var autoSelectProperty in autoSelectProperties)
{
ODataSelectPath odataSelectPath = BuildSelectPath(autoSelectProperty, navigationSource);
PathSelectItem pathSelectItem = new PathSelectItem(odataSelectPath);
autoSelectItems.Add(pathSelectItem);
}
depth--;
if (depth < 0)
{
return;
}
IList <ExpandModelPath> autoExpandNavigationProperties = model.GetAutoExpandPaths(baseEntityType, null, !isAllSelected, modelBoundQuerySettings);
foreach (ExpandModelPath itemPath in autoExpandNavigationProperties)
{
string navigationPath = itemPath.NavigationPropertyPath;
IEdmNavigationProperty navigationProperty = itemPath.Navigation;
IEdmNavigationSource currentEdmNavigationSource;
if (navigationPath != null)
{
currentEdmNavigationSource = navigationSource.FindNavigationTarget(navigationProperty);
}
else
{
currentEdmNavigationSource = navigationSource.FindNavigationTarget(navigationProperty, new EdmPathExpression(navigationPath));
}
if (currentEdmNavigationSource != null)
{
ODataExpandPath expandPath = BuildExpandPath(itemPath, navigationSource, currentEdmNavigationSource);
SelectExpandClause selectExpandClause = new SelectExpandClause(new List <SelectItem>(), true);
ExpandedNavigationSelectItem item = new ExpandedNavigationSelectItem(expandPath, currentEdmNavigationSource, selectExpandClause);
modelBoundQuerySettings = model.GetModelBoundQuerySettings(navigationProperty, navigationProperty.ToEntityType());
List <SelectItem> nestedSelectItems;
List <SelectItem> nestedExpandItems;
int maxExpandDepth = GetMaxExpandDepth(modelBoundQuerySettings, navigationProperty.Name);
if (maxExpandDepth != 0 && maxExpandDepth < depth)
{
depth = maxExpandDepth;
}
GetAutoSelectExpandItems(
currentEdmNavigationSource.EntityType(),
model,
item.NavigationSource,
true,
modelBoundQuerySettings,
depth,
out nestedSelectItems,
out nestedExpandItems);
selectExpandClause = new SelectExpandClause(nestedSelectItems.Concat(nestedExpandItems), nestedSelectItems.Count == 0);
item = new ExpandedNavigationSelectItem(expandPath, currentEdmNavigationSource, selectExpandClause);
autoExpandItems.Add(item);
if (!isAllSelected || autoSelectProperties.Any())
{
PathSelectItem pathSelectItem = new PathSelectItem(new ODataSelectPath(expandPath));
autoExpandItems.Add(pathSelectItem);
}
}
}
}
private void AppendExpression(ODataExpandPath path)
{
string text = path.ToContextUrlPathString();
query.Append(text);
}
/// <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;
}
}
}
}
