/// <summary>
/// Validates that the parsed context URI from the payload is consistent with the expected
/// collection item type when reading collection payloads.
/// </summary>
/// <param name="contextUriParseResult">The parse result of the context URI from the payload.</param>
/// <param name="expectedItemTypeReference">The expected item type of the collection items.</param>
/// <returns>The actual item type of the collection items.</returns>
internal static IEdmTypeReference ValidateCollectionContextUriAndGetPayloadItemTypeReference(
ODataJsonLightContextUriParseResult contextUriParseResult,
IEdmTypeReference expectedItemTypeReference)
{
if (contextUriParseResult == null || contextUriParseResult.EdmType == null)
{
return expectedItemTypeReference;
}
Debug.Assert(contextUriParseResult.EdmType is IEdmCollectionType, "contextUriParseResult.EdmType is IEdmCollectionType");
IEdmCollectionType actualCollectionType = (IEdmCollectionType)contextUriParseResult.EdmType;
if (expectedItemTypeReference != null)
{
// We allow co-variance in collection types (e.g., expecting the item type of Geography from a payload of Collection(GeographyPoint).
if (!expectedItemTypeReference.IsAssignableFrom(actualCollectionType.ElementType))
{
throw new ODataException(OData.Core.Strings.ReaderValidationUtils_ContextUriDoesNotReferTypeAssignableToExpectedType(
UriUtils.UriToString(contextUriParseResult.ContextUri),
actualCollectionType.ElementType.ODataFullName(),
expectedItemTypeReference.ODataFullName()));
}
}
return actualCollectionType.ElementType;
}
