internal static bool ResolveOperationImportFromList(string identifier, IList <string> parameterNames, IEdmModel model, out IEdmOperationImport matchingOperationImport, ODataUriResolver resolver)
{
IList <IEdmOperationImport> candidateMatchingOperationImports = null;
IList <IEdmActionImport> foundActionImportsWhenLookingForFunctions = new List <IEdmActionImport>();
try
{
if (parameterNames.Count > 0)
{
// In this case we have to return a function so filter out actions because the number of parameters > 0.
candidateMatchingOperationImports = resolver.ResolveOperationImports(model, identifier).RemoveActionImports(out foundActionImportsWhenLookingForFunctions).FilterFunctionsByParameterNames(parameterNames, resolver.EnableCaseInsensitive).Cast <IEdmOperationImport>().ToList();
}
else
{
candidateMatchingOperationImports = resolver.ResolveOperationImports(model, identifier).ToList();
}
}
catch (Exception exc)
{
if (!ExceptionUtils.IsCatchableExceptionType(exc))
{
throw;
}
throw new ODataException(ODataErrorStrings.FunctionOverloadResolver_FoundInvalidOperationImport(identifier), exc);
}
if (foundActionImportsWhenLookingForFunctions.Count > 0)
{
throw ExceptionUtil.CreateBadRequestError(ODataErrorStrings.RequestUriProcessor_SegmentDoesNotSupportKeyPredicates(identifier));
}
// 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 (candidateMatchingOperationImports.Any(f => f.IsActionImport()))
{
if (candidateMatchingOperationImports.Count > 1)
{
if (candidateMatchingOperationImports.Any(o => o.IsFunctionImport()))
{
throw new ODataException(ODataErrorStrings.FunctionOverloadResolver_MultipleOperationImportOverloads(identifier));
}
else
{
throw new ODataException(ODataErrorStrings.FunctionOverloadResolver_MultipleActionImportOverloads(identifier));
}
}
if (parameterNames.Count() != 0)
{
throw ExceptionUtil.CreateBadRequestError(ODataErrorStrings.RequestUriProcessor_SegmentDoesNotSupportKeyPredicates(identifier));
}
matchingOperationImport = candidateMatchingOperationImports.Single();
return(true);
}
// If parameter count is zero and there is one function import whoese parameter count is zero, return this function import.
if (candidateMatchingOperationImports.Count > 1 && parameterNames.Count == 0)
{
candidateMatchingOperationImports = candidateMatchingOperationImports.Where(operationImport => operationImport.Operation.Parameters.Count() == 0).ToList();
}
if (candidateMatchingOperationImports.Count == 0)
{
matchingOperationImport = null;
return(false);
}
if (candidateMatchingOperationImports.Count > 1)
{
throw new ODataException(ODataErrorStrings.FunctionOverloadResolver_MultipleOperationImportOverloads(identifier));
}
matchingOperationImport = candidateMatchingOperationImports.Single();
return(matchingOperationImport != null);
}