public static bool IsOrInheritsFrom(this IEdmType thisType, IEdmType otherType)
{
if (thisType == null || otherType == null)
{
return(false);
}
else
{
if (!thisType.IsEquivalentTo(otherType))
{
EdmTypeKind typeKind = thisType.TypeKind;
if (typeKind != otherType.TypeKind || typeKind != EdmTypeKind.Entity && typeKind != EdmTypeKind.Complex && typeKind != EdmTypeKind.Row)
{
return(false);
}
else
{
return(thisType.IsOrInheritsFrom(otherType));
}
}
else
{
return(true);
}
}
}
/// <summary>
/// Parses the next OData path segment following an entity collection.
/// </summary>
/// <param name="model">The model to use for path parsing.</param>
/// <param name="previous">The previous path segment.</param>
/// <param name="previousEdmType">The EDM type of the OData path up to the previous segment.</param>
/// <param name="segment">The value of the segment to parse.</param>
/// <returns>A parsed representation of the segment.</returns>
protected virtual ODataPathSegment ParseAtEntityCollection(IEdmModel model, ODataPathSegment previous, IEdmType previousEdmType, string segment)
{
if (previous == null)
{
throw Error.ArgumentNull("previous");
}
if (String.IsNullOrEmpty(segment))
{
throw Error.Argument(SRResources.SegmentNullOrEmpty);
}
if (previousEdmType == null)
{
throw Error.InvalidOperation(SRResources.PreviousSegmentEdmTypeCannotBeNull);
}
IEdmCollectionType collectionType = previousEdmType as IEdmCollectionType;
if (collectionType == null)
{
throw Error.Argument(SRResources.PreviousSegmentMustBeEntityCollectionType, previousEdmType);
}
IEdmEntityType elementType = collectionType.ElementType.Definition as IEdmEntityType;
if (elementType == null)
{
throw Error.Argument(SRResources.PreviousSegmentMustBeEntityCollectionType, previousEdmType);
}
// look for keys first.
if (segment.StartsWith("(", StringComparison.Ordinal) && segment.EndsWith(")", StringComparison.Ordinal))
{
Contract.Assert(segment.Length >= 2);
string value = segment.Substring(1, segment.Length - 2);
return(new KeyValuePathSegment(value));
}
// next look for casts
IEdmEntityType castType = model.FindDeclaredType(segment) as IEdmEntityType;
if (castType != null)
{
IEdmType previousElementType = collectionType.ElementType.Definition;
if (!castType.IsOrInheritsFrom(previousElementType) && !previousElementType.IsOrInheritsFrom(castType))
{
throw new ODataException(Error.Format(SRResources.InvalidCastInPath, castType, previousElementType));
}
return(new CastPathSegment(castType));
}
// now look for bindable actions
IEdmEntityContainer container = ExtractEntityContainer(model);
IEdmFunctionImport procedure = container.FunctionImports().FindBindableAction(collectionType, segment);
if (procedure != null)
{
return(new ActionPathSegment(procedure));
}
throw new ODataException(Error.Format(SRResources.NoActionFoundForCollection, segment, collectionType.ElementType));
}
/// <summary>
/// Check whether the parent and child are properly related types
/// </summary>
/// <param name="parentType">the parent type</param>
/// <param name="childType">the child type</param>
/// <exception cref="ODataException">Throws if the two types are not related.</exception>
public static void CheckRelatedTo(IEdmType parentType, IEdmType childType)
{
IEdmEntityType childEntityType = childType as IEdmEntityType;
if (!childEntityType.IsOrInheritsFrom(parentType) && !parentType.IsOrInheritsFrom(childEntityType))
{
// If the parentType is an open property, parentType will be null and can't have an ODataFullName.
string parentTypeName = (parentType != null) ? parentType.ODataFullName() : "<null>";
throw new ODataException(OData.Strings.MetadataBinder_HierarchyNotFollowed(childEntityType.FullName(), parentTypeName));
}
}
/// <summary>
/// Throws if the type is not related to the type of the given set.
/// </summary>
/// <param name="type">Type to check.</param>
/// <param name="secondType">Second type, which should be related to the first type.</param>
/// <param name="segmentName">The segment that is checking this.</param>
public static void ThrowIfTypesUnrelated(IEdmType type, IEdmType secondType, string segmentName)
{
ExceptionUtils.CheckArgumentNotNull(type, "type");
ExceptionUtils.CheckArgumentNotNull(secondType, "secondType");
IEdmType unwrappedType = type;
IEdmCollectionType collectionType = type as IEdmCollectionType;
if (collectionType != null)
{
unwrappedType = collectionType.ElementType.Definition;
}
if (!unwrappedType.IsOrInheritsFrom(secondType) && !secondType.IsOrInheritsFrom(unwrappedType))
{
throw new ODataException(ODataErrorStrings.PathParser_TypeMustBeRelatedToSet(type, secondType, segmentName));
}
}
private static bool TestTypeMatch(this IEdmType expressionType, IEdmType assertedType, EdmLocation location, bool matchExactly, out IEnumerable <EdmError> discoveredErrors)
{
if (matchExactly)
{
if (!expressionType.IsEquivalentTo(assertedType))
{
discoveredErrors = new EdmError[] { new EdmError(location, EdmErrorCode.ExpressionNotValidForTheAssertedType, Edm.Strings.EdmModel_Validator_Semantic_ExpressionNotValidForTheAssertedType) };
return(false);
}
}
else
{
// A bad type matches anything (so as to avoid generating spurious errors).
if (expressionType.TypeKind == EdmTypeKind.None || expressionType.IsBad())
{
discoveredErrors = Enumerable.Empty <EdmError>();
return(true);
}
if (expressionType.TypeKind == EdmTypeKind.Primitive && assertedType.TypeKind == EdmTypeKind.Primitive)
{
IEdmPrimitiveType primitiveExpressionType = expressionType as IEdmPrimitiveType;
IEdmPrimitiveType primitiveAssertedType = assertedType as IEdmPrimitiveType;
if (!primitiveExpressionType.PrimitiveKind.PromotesTo(primitiveAssertedType.PrimitiveKind))
{
discoveredErrors = new EdmError[] { new EdmError(location, EdmErrorCode.ExpressionPrimitiveKindNotValidForAssertedType, Edm.Strings.EdmModel_Validator_Semantic_ExpressionPrimitiveKindCannotPromoteToAssertedType(expressionType.ToTraceString(), assertedType.ToTraceString())) };
return(false);
}
}
else
{
if (!expressionType.IsOrInheritsFrom(assertedType))
{
discoveredErrors = new EdmError[] { new EdmError(location, EdmErrorCode.ExpressionNotValidForTheAssertedType, Edm.Strings.EdmModel_Validator_Semantic_ExpressionNotValidForTheAssertedType) };
return(false);
}
}
}
discoveredErrors = Enumerable.Empty <EdmError>();
return(true);
}
/// <summary>
/// Try to bind namespace-qualified type cast segment.
/// </summary>
internal static bool TryBindTypeCastSegment(string identifier, string parenthesisExpressions, IEdmModel model,
IList <PathSegment> path,
PathParserSettings settings)
{
if (identifier == null || identifier.IndexOf('.') < 0)
{
// type cast should be namespace-qualified name
return(false);
}
PathSegment preSegment = path.LastOrDefault();
if (preSegment == null)
{
// type cast should not be the first segment.
return(false);
}
IEdmSchemaType schemaType = model.ResolveType(identifier, settings.EnableCaseInsensitive);
if (schemaType == null)
{
return(false);
}
IEdmType targetEdmType = schemaType as IEdmType;
if (targetEdmType == null)
{
return(false);
}
IEdmType previousEdmType = preSegment.EdmType;
bool isNullable = false;
if (previousEdmType.TypeKind == EdmTypeKind.Collection)
{
previousEdmType = ((IEdmCollectionType)previousEdmType).ElementType.Definition;
isNullable = ((IEdmCollectionType)previousEdmType).ElementType.IsNullable;
}
if (!targetEdmType.IsOrInheritsFrom(previousEdmType) && !previousEdmType.IsOrInheritsFrom(targetEdmType))
{
throw new Exception($"Type cast {targetEdmType.FullTypeName()} has no relationship with previous {previousEdmType.FullTypeName()}.");
}
// We want the type of the type segment to be a collection if the previous segment was a collection
IEdmType actualTypeOfTheTypeSegment = targetEdmType;
if (preSegment.EdmType.TypeKind == EdmTypeKind.Collection)
{
var actualEntityTypeOfTheTypeSegment = targetEdmType as IEdmEntityType;
if (actualEntityTypeOfTheTypeSegment != null)
{
actualTypeOfTheTypeSegment = new EdmCollectionType(new EdmEntityTypeReference(actualEntityTypeOfTheTypeSegment, isNullable));
}
else
{
// Complex collection supports type cast too.
var actualComplexTypeOfTheTypeSegment = actualTypeOfTheTypeSegment as IEdmComplexType;
if (actualComplexTypeOfTheTypeSegment != null)
{
actualTypeOfTheTypeSegment = new EdmCollectionType(new EdmComplexTypeReference(actualComplexTypeOfTheTypeSegment, isNullable));
}
else
{
throw new Exception($"Invalid type cast of {identifier}, it should be entity or complex.");
}
}
}
TypeSegment typeCast = new TypeSegment(actualTypeOfTheTypeSegment, preSegment.EdmType, preSegment.NavigationSource, identifier);
path.Add(typeCast);
TryBindKeySegment(parenthesisExpressions, path);
return(true);
}
/// <summary>
/// Check whether the two are properly related types
/// </summary>
/// <param name="first">the first type</param>
/// <param name="second">the second type</param>
/// <returns>Whether the two types are related.</returns>
public static bool IsRelatedTo(IEdmType first, IEdmType second)
{
return(second.IsOrInheritsFrom(first) || first.IsOrInheritsFrom(second));
}
/// <summary>
/// Parses the next OData path segment following an entity collection.
/// </summary>
/// <param name="model">The model to use for path parsing.</param>
/// <param name="previous">The previous path segment.</param>
/// <param name="previousEdmType">The EDM type of the OData path up to the previous segment.</param>
/// <param name="segment">The value of the segment to parse.</param>
/// <param name="segments">The queue of pending segments.</param>
/// <returns>A parsed representation of the segment.</returns>
protected virtual ODataPathSegment ParseAtEntityCollection(IEdmModel model, ODataPathSegment previous,
IEdmType previousEdmType, string segment, Queue <string> segments)
{
if (previous == null)
{
throw Error.ArgumentNull("previous");
}
if (segments == null)
{
throw Error.ArgumentNull("segments");
}
if (String.IsNullOrEmpty(segment))
{
throw Error.Argument(SRResources.SegmentNullOrEmpty);
}
if (previousEdmType == null)
{
throw Error.InvalidOperation(SRResources.PreviousSegmentEdmTypeCannotBeNull);
}
IEdmCollectionType collectionType = previousEdmType as IEdmCollectionType;
if (collectionType == null)
{
throw Error.Argument(SRResources.PreviousSegmentMustBeEntityCollectionType, previousEdmType);
}
IEdmEntityType elementType = collectionType.ElementType.Definition as IEdmEntityType;
if (elementType == null)
{
throw Error.Argument(SRResources.PreviousSegmentMustBeEntityCollectionType, previousEdmType);
}
// look for keys first.
if (segment.StartsWith("(", StringComparison.Ordinal) && segment.EndsWith(")", StringComparison.Ordinal))
{
Contract.Assert(segment.Length >= 2);
string value = segment.Substring(1, segment.Length - 2);
return(new KeyValuePathSegment(value));
}
// next look for casts
IEdmEntityType castType = model.FindDeclaredType(segment) as IEdmEntityType;
if (castType != null)
{
IEdmType previousElementType = collectionType.ElementType.Definition;
if (!castType.IsOrInheritsFrom(previousElementType) && !previousElementType.IsOrInheritsFrom(castType))
{
throw new ODataException(Error.Format(SRResources.InvalidCastInPath, castType, previousElementType));
}
return(new CastPathSegment(castType));
}
// look for $ref
if (segment == ODataSegmentKinds.Ref)
{
return(new RefPathSegment());
}
// now look for bindable actions
IEdmAction action = model.FindAction(segment, collectionType);
if (action != null)
{
return(new BoundActionPathSegment(action));
}
// Try to match this to a function call
BoundFunctionPathSegment pathSegment = TryMatchBoundFunctionCall(segment, segments, model, bindingType: collectionType);
if (pathSegment != null)
{
return(pathSegment);
}
throw new ODataException(Error.Format(SRResources.NoActionFoundForCollection, segment, collectionType.ElementType));
}
/// <summary>
/// Check whether the two are properly related types
/// </summary>
/// <param name="first">the first type</param>
/// <param name="second">the second type</param>
/// <returns>Whether the two types are related.</returns>
public static bool IsRelatedTo(IEdmType first, IEdmType second)
{
return second.IsOrInheritsFrom(first) || first.IsOrInheritsFrom(second);
}
private static bool IsAssignableFrom(IEdmType candidateSupertype, IEdmType candidateSubtype)
{
return(candidateSubtype.IsOrInheritsFrom(candidateSupertype));
}
private bool TryCreateTypeNameSegment(ODataPathSegment previous, string identifier, string parenthesisExpression, IEdmType targetEdmType)
{
if (previous.TargetEdmType == null || targetEdmType == null)
{
return false;
}
// if the new type segment prevents any results from possibly being returned, then short-circuit and throw a 404.
IEdmType previousEdmType = previous.TargetEdmType;
Debug.Assert(previousEdmType != null, "previous.TargetEdmType != null");
if (previousEdmType.TypeKind == EdmTypeKind.Collection)
{
previousEdmType = ((IEdmCollectionType)previousEdmType).ElementType.Definition;
}
if (!targetEdmType.IsOrInheritsFrom(previousEdmType) && !previousEdmType.IsOrInheritsFrom(targetEdmType))
{
throw ExceptionUtil.CreateBadRequestError(ODataErrorStrings.RequestUriProcessor_InvalidTypeIdentifier_UnrelatedType(targetEdmType.ODataFullName(), previousEdmType.ODataFullName()));
}
// We want the type of the type segment to be a collection if the previous segment was a collection
IEdmType actualTypeOfTheTypeSegment = targetEdmType;
if (previous.EdmType.TypeKind == EdmTypeKind.Collection)
{
// creating a new collection type here because the type in the request is just the item type, there is no user-provided collection type.
var actualEntityTypeOfTheTypeSegment = actualTypeOfTheTypeSegment as IEdmEntityType;
if (actualEntityTypeOfTheTypeSegment != null)
{
actualTypeOfTheTypeSegment = new EdmCollectionType(new EdmEntityTypeReference(actualEntityTypeOfTheTypeSegment, false));
}
else
{
throw new ODataException(Strings.PathParser_TypeCastOnlyAllowedAfterEntityCollection(identifier));
}
}
var typeNameSegment = (ODataPathSegment)new TypeSegment(actualTypeOfTheTypeSegment, previous.TargetEdmNavigationSource)
{
Identifier = identifier,
TargetKind = previous.TargetKind,
SingleResult = previous.SingleResult,
TargetEdmType = targetEdmType
};
this.parsedSegments.Add(typeNameSegment);
// Key expressions are allowed on Type segments
this.TryBindKeyFromParentheses(parenthesisExpression);
return true;
}
private static bool IsAssignableFrom(IEdmType candidateSupertype, IEdmType candidateSubtype)
{
return candidateSubtype.IsOrInheritsFrom(candidateSupertype);
}
