/// <summary>
/// Try to resolve a function from the given inputs.
/// </summary>
/// <param name="identifier">The identifier of the function that we're trying to find</param>
/// <param name="parameterNames">the names of the parameters to search for.</param>
/// <param name="bindingType">the type of the previous segment</param>
/// <param name="model">the model to use to look up the operation import</param>
/// <param name="matchingOperation">The single matching function found.</param>
/// <param name="resolver">Resolver to be used.</param>
/// <returns>True if a function was matched, false otherwise. Will throw if the model has illegal operation imports.</returns>
internal static bool ResolveOperationFromList(string identifier, IEnumerable <string> parameterNames, IEdmType bindingType, IEdmModel model, out IEdmOperation matchingOperation, ODataUriResolver resolver)
{
// TODO: update code that is duplicate between operation and operation import, add more tests.
// If the previous segment is an open type, the service action name is required to be fully qualified or else we always treat it as an open property name.
if (bindingType != null)
{
// TODO: look up actual container names here?
// When using extension, there may be function call with unqualified name. So loose the restriction here.
if (bindingType.IsOpen() && !identifier.Contains(".") && resolver.GetType() == typeof(ODataUriResolver))
{
matchingOperation = null;
return(false);
}
}
IEnumerable <IEdmOperation> candidateMatchingOperations = null;
// The extension method FindBoundOperations & FindOperations call IEdmModel.FindDeclaredBoundOperations which can be implemented by anyone and it could throw any type of exception
// so catching all of them and simply putting it in the inner exception.
try
{
if (bindingType != null)
{
candidateMatchingOperations = resolver.ResolveBoundOperations(model, identifier, bindingType);
}
else
{
candidateMatchingOperations = resolver.ResolveUnboundOperations(model, identifier);
}
}
catch (Exception exc)
{
if (ExceptionUtils.IsCatchableExceptionType(exc))
{
throw new ODataException(ODataErrorStrings.FunctionOverloadResolver_FoundInvalidOperation(identifier), exc);
}
throw;
}
IList <IEdmOperation> foundActionsWhenLookingForFunctions = new List <IEdmOperation>();
bool hasParameters = parameterNames.Count() > 0;
if (bindingType != null)
{
candidateMatchingOperations.EnsureOperationsBoundWithBindingParameter();
}
// If the number of parameters > 0 then this has to be a function as actions can't have parameters on the uri only in the payload. Filter further by parameters in this case, otherwise don't.
if (hasParameters)
{
// can only be a function as only functions have parameters on the uri.
candidateMatchingOperations = candidateMatchingOperations.RemoveActions(out foundActionsWhenLookingForFunctions)
.FilterOperationsByParameterNames(parameterNames, resolver.EnableCaseInsensitive);
}
else if (bindingType != null)
{
// Filter out functions with more than one parameter. Actions should not be filtered as the parameters are in the payload not the uri
candidateMatchingOperations = candidateMatchingOperations.Where(o =>
(o.IsFunction() && (o.Parameters.Count() == 1 || o.Parameters.Skip(1).All(p => p is IEdmOptionalParameter))) || o.IsAction());
}
else
{
// Filter out functions with any parameters
candidateMatchingOperations = candidateMatchingOperations.Where(o => (o.IsFunction() && !o.Parameters.Any()) || o.IsAction());
}
// Only filter if there is more than one and its needed.
if (candidateMatchingOperations.Count() > 1)
{
candidateMatchingOperations = candidateMatchingOperations.FilterBoundOperationsWithSameTypeHierarchyToTypeClosestToBindingType(bindingType);
}
// If any of the things returned are an action, it better be the only thing returned, and there can't be parameters in the URL
if (candidateMatchingOperations.Any(f => f.IsAction()))
{
if (candidateMatchingOperations.Count() > 1)
{
if (candidateMatchingOperations.Any(o => o.IsFunction()))
{
throw new ODataException(ODataErrorStrings.FunctionOverloadResolver_MultipleOperationOverloads(identifier));
}
else
{
throw new ODataException(ODataErrorStrings.FunctionOverloadResolver_MultipleActionOverloads(identifier));
}
}
if (hasParameters)
{
throw ExceptionUtil.CreateBadRequestError(ODataErrorStrings.RequestUriProcessor_SegmentDoesNotSupportKeyPredicates(identifier));
}
matchingOperation = candidateMatchingOperations.Single();
return(true);
}
if (foundActionsWhenLookingForFunctions.Count > 0)
{
throw ExceptionUtil.CreateBadRequestError(ODataErrorStrings.RequestUriProcessor_SegmentDoesNotSupportKeyPredicates(identifier));
}
// If more than one overload matches, try to select based on optional parameters
if (candidateMatchingOperations.Count() > 1)
{
candidateMatchingOperations = candidateMatchingOperations.FindBestOverloadBasedOnParameters(parameterNames);
}
if (candidateMatchingOperations.Count() > 1)
{
throw new ODataException(ODataErrorStrings.FunctionOverloadResolver_NoSingleMatchFound(identifier, string.Join(",", parameterNames.ToArray())));
}
matchingOperation = candidateMatchingOperations.SingleOrDefault();
return(matchingOperation != null);
}
/// <summary>
/// Try to resolve a function from the given inputs.
/// </summary>
/// <param name="identifier">The identifier of the function that we're trying to find</param>
/// <param name="parameterNames">the names of the parameters to search for.</param>
/// <param name="bindingType">the type of the previous segment</param>
/// <param name="model">the model to use to look up the operation import</param>
/// <param name="matchingOperation">The single matching function found.</param>
/// <param name="resolver">Resolver to be used.</param>
/// <returns>True if a function was matched, false otherwise. Will throw if the model has illegal operation imports.</returns>
internal static bool ResolveOperationFromList(string identifier, IList <string> parameterNames, IEdmType bindingType, IEdmModel model, out IEdmOperation matchingOperation, ODataUriResolver resolver)
{
// TODO: update code that is duplicate between operation and operation import, add more tests.
// If the previous segment is an open type, the service action name is required to be fully qualified or else we always treat it as an open property name.
matchingOperation = null;
if (bindingType != null)
{
// TODO: look up actual container names here?
// When using extension, there may be function call with unqualified name. So loose the restriction here.
if (bindingType.IsOpen() && !identifier.Contains(".") && resolver.GetType() == typeof(ODataUriResolver))
{
return(false);
}
}
IEnumerable <IEdmOperation> operationsFromModel;
// The extension method FindBoundOperations & FindOperations call IEdmModel.FindDeclaredBoundOperations which can be implemented by anyone and it could throw any type of exception
// so catching all of them and simply putting it in the inner exception.
try
{
if (bindingType != null)
{
operationsFromModel = resolver.ResolveBoundOperations(model, identifier, bindingType);
}
else
{
operationsFromModel = resolver.ResolveUnboundOperations(model, identifier);
}
}
catch (Exception exc)
{
if (ExceptionUtils.IsCatchableExceptionType(exc))
{
throw new ODataException(ODataErrorStrings.FunctionOverloadResolver_FoundInvalidOperation(identifier), exc);
}
throw;
}
bool foundActionsWhenLookingForFunctions;
// Filters candidates based on the parameter names specified in the uri, removes actions if there were parameters specified in the uri but set the out bool to indicate that.
// If no parameters specified, then matches based on binding type or matches with operations with no parameters.
IList <IEdmOperation> candidatesMatchingOperations = operationsFromModel.FilterOperationCandidatesBasedOnParameterList(bindingType, parameterNames, resolver.EnableCaseInsensitive, out foundActionsWhenLookingForFunctions);
// Only filter if there is more than one and its needed.
if (candidatesMatchingOperations.Count > 1)
{
candidatesMatchingOperations = candidatesMatchingOperations.FilterBoundOperationsWithSameTypeHierarchyToTypeClosestToBindingType(bindingType) as IList <IEdmOperation>;
// This will be only null when no candidates are left. In that case, we can return false here.
if (candidatesMatchingOperations == null)
{
if (foundActionsWhenLookingForFunctions)
{
throw ExceptionUtil.CreateBadRequestError(ODataErrorStrings.RequestUriProcessor_SegmentDoesNotSupportKeyPredicates(identifier));
}
return(false);
}
}
// If any of the candidates are an action, it better be the only thing returned, and there can't be parameters in the URL
if (ResolveActionFromCandidates(candidatesMatchingOperations, identifier, parameterNames.Count > 0, out matchingOperation))
{
return(true);
}
if (foundActionsWhenLookingForFunctions)
{
throw ExceptionUtil.CreateBadRequestError(ODataErrorStrings.RequestUriProcessor_SegmentDoesNotSupportKeyPredicates(identifier));
}
// If more than one overload matches, try to select based on optional parameters
if (candidatesMatchingOperations.Count > 1)
{
candidatesMatchingOperations = candidatesMatchingOperations.FilterOverloadsBasedOnParameterCount(parameterNames.Count);
}
if (candidatesMatchingOperations.Count > 1)
{
throw new ODataException(ODataErrorStrings.FunctionOverloadResolver_NoSingleMatchFound(identifier, string.Join(",", parameterNames.ToArray())));
}
matchingOperation = candidatesMatchingOperations.Count > 0 ? candidatesMatchingOperations[0] : null;
return(matchingOperation != null);
}