private static string ComputeNavigationPath(EdmNavigationSourceKind kind, ODataUri odataUri, string navigationSource)
{
bool isContained = kind == EdmNavigationSourceKind.ContainedEntitySet;
bool isUnknownEntitySet = kind == EdmNavigationSourceKind.UnknownEntitySet;
if (isUnknownEntitySet)
{
// If the navigation target is not specified, i.e., UnknownEntitySet,
// the navigation path should be null so that type name will be used
// to build the context Url.
return(null);
}
string navigationPath = null;
if (isContained && odataUri != null && odataUri.Path != null)
{
ODataPath odataPath = odataUri.Path.TrimEndingTypeSegment().TrimEndingKeySegment();
if (!(odataPath.LastSegment is NavigationPropertySegment) && !(odataPath.LastSegment is OperationSegment))
{
throw new ODataException(Strings.ODataContextUriBuilder_ODataPathInvalidForContainedElement(odataPath.ToContextUrlPathString()));
}
navigationPath = odataPath.ToContextUrlPathString();
}
return(navigationPath ?? navigationSource);
}
private void RemoveRedundantContainingPathSegments()
{
// Find the last non-contained navigation property segment:
// Collection valued: entity set
// -or-
// Single valued: singleton
// Copy over other path segments such as: not a navigation path segment, contained navigation property,
// single valued navigation property with navigation source targetting an entity set (we won't have key
// information for that navigation property.)
_segments.Reverse();
NavigationPropertySegment navigationPropertySegment = null;
List <ODataPathSegment> newSegments = new List <ODataPathSegment>();
foreach (ODataPathSegment segment in _segments)
{
navigationPropertySegment = segment as NavigationPropertySegment;
if (navigationPropertySegment != null)
{
EdmNavigationSourceKind navigationSourceKind =
navigationPropertySegment.NavigationSource.NavigationSourceKind();
if ((navigationPropertySegment.NavigationProperty.TargetMultiplicity() == EdmMultiplicity.Many &&
navigationSourceKind == EdmNavigationSourceKind.EntitySet) ||
(navigationSourceKind == EdmNavigationSourceKind.Singleton))
{
break;
}
}
newSegments.Insert(0, segment);
}
// Start the path with the navigation source of the navigation property found above.
if (navigationPropertySegment != null)
{
IEdmNavigationSource navigationSource = navigationPropertySegment.NavigationSource;
Contract.Assert(navigationSource != null);
if (navigationSource.NavigationSourceKind() == EdmNavigationSourceKind.Singleton)
{
SingletonSegment singletonSegment = new SingletonSegment((IEdmSingleton)navigationSource);
newSegments.Insert(0, singletonSegment);
}
else
{
Contract.Assert(navigationSource.NavigationSourceKind() == EdmNavigationSourceKind.EntitySet);
EntitySetSegment entitySetSegment = new EntitySetSegment((IEdmEntitySet)navigationSource);
newSegments.Insert(0, entitySetSegment);
}
}
_segments = newSegments;
}
/// <summary>
/// Create ODataContextUrlInfo from basic information
/// </summary>
/// <param name="navigationSource">Navigation source for current element.</param>\
/// <param name="expectedEntityTypeName">The expectedEntity for current element.</param>
/// <param name="isSingle">Whether target is single item.</param>
/// <param name="odataUri">The odata uri info for current query.</param>
/// <returns>The generated ODataContextUrlInfo.</returns>
internal static ODataContextUrlInfo Create(IEdmNavigationSource navigationSource, string expectedEntityTypeName, bool isSingle, ODataUri odataUri)
{
EdmNavigationSourceKind kind = navigationSource.NavigationSourceKind();
string navigationSourceEntityType = navigationSource.EntityType().FullName();
return(new ODataContextUrlInfo()
{
isContained = kind == EdmNavigationSourceKind.ContainedEntitySet,
navigationSource = navigationSource.Name,
TypeCast = navigationSourceEntityType == expectedEntityTypeName ? null : expectedEntityTypeName,
TypeName = navigationSourceEntityType,
IncludeFragmentItemSelector = isSingle && kind != EdmNavigationSourceKind.Singleton,
odataUri = odataUri
});
}
/// <summary>
/// Create ODataContextUrlInfo from basic information
/// </summary>
/// <param name="navigationSource">Navigation source for current element.</param>\
/// <param name="expectedEntityTypeName">The expectedEntity for current element.</param>
/// <param name="isSingle">Whether target is single item.</param>
/// <param name="odataUri">The odata uri info for current query.</param>
/// <param name="version">The OData Version of the response.</param>
/// <returns>The generated ODataContextUrlInfo.</returns>
internal static ODataContextUrlInfo Create(IEdmNavigationSource navigationSource, string expectedEntityTypeName, bool isSingle, ODataUri odataUri, ODataVersion version)
{
EdmNavigationSourceKind kind = navigationSource.NavigationSourceKind();
string navigationSourceEntityType = navigationSource.EntityType().FullName();
return(new ODataContextUrlInfo()
{
IsUnknownEntitySet = kind == EdmNavigationSourceKind.UnknownEntitySet,
NavigationSource = navigationSource.Name,
TypeCast = navigationSourceEntityType == expectedEntityTypeName ? null : expectedEntityTypeName,
TypeName = navigationSourceEntityType,
IncludeFragmentItemSelector = isSingle && kind != EdmNavigationSourceKind.Singleton,
NavigationPath = ComputeNavigationPath(kind, odataUri, navigationSource.Name),
ResourcePath = ComputeResourcePath(odataUri),
QueryClause = ComputeQueryClause(odataUri, version),
IsUndeclared = ComputeIfIsUndeclared(odataUri)
});
}
