private List<FunctionParameter> CreateFunctionReturnParameters(FunctionDescriptor functionDescriptor)
{
var returnParameters = new List<FunctionParameter>();
EdmType returnEdmType = null;
switch (functionDescriptor.StoreFunctionKind)
{
case StoreFunctionKind.TableValuedFunction:
Debug.Assert(functionDescriptor.ReturnTypes.Length == 1, "Expected only one returnType for composable functions");
returnEdmType =
CreateReturnRowType(functionDescriptor.ResultColumnName, functionDescriptor.ReturnTypes[0])
.GetCollectionType();
break;
case StoreFunctionKind.ScalarUserDefinedFunction:
var returnPrimtiveType = functionDescriptor.ReturnTypes[0].BuiltInTypeKind == BuiltInTypeKind.EnumType
? ((EnumType) functionDescriptor.ReturnTypes[0]).UnderlyingType
: functionDescriptor.ReturnTypes[0];
returnEdmType = GetStorePrimitiveType(returnPrimtiveType);
break;
}
if (returnEdmType != null)
{
returnParameters.Add(
FunctionParameter.Create(
"ReturnParam",
returnEdmType,
ParameterMode.ReturnValue));
}
return returnParameters;
}
public EdmFunction Create(FunctionDescriptor functionDescriptor)
{
Debug.Assert(functionDescriptor != null, "functionDescriptor is null");
if (_schema == null && functionDescriptor.DatabaseSchema == null)
{
throw new InvalidOperationException(
string.Format(
"Database schema is not defined for function '{0}'. Either set a default database schema or use the DbFunctionEx attribute with non-null DatabaseSchema value.",
functionDescriptor.Name));
}
var functionPayload =
new EdmFunctionPayload
{
Parameters = functionDescriptor
.Parameters
.Select(
p => FunctionParameter.Create(
p.Name,
GetStorePrimitiveType(
p.EdmType.BuiltInTypeKind == BuiltInTypeKind.EnumType
? ((EnumType)p.EdmType).UnderlyingType
: p.EdmType),
p.IsOutParam
? ParameterMode.InOut
: ParameterMode.In)).ToArray(),
ReturnParameters = CreateFunctionReturnParameters(functionDescriptor),
IsComposable = functionDescriptor.StoreFunctionKind != StoreFunctionKind.StoredProcedure,
Schema = functionDescriptor.DatabaseSchema ?? _schema,
};
return EdmFunction.Create(
functionDescriptor.Name,
_namespace,
DataSpace.SSpace,
functionPayload,
null);
}