public static IReadOnlyDictionary <int, TEnum> MapToLookupTable <TLookup, TEnum>(
this IQueryable <TLookup> lookupTerms,
IReadOnlyDictionary <string, TEnum> enumValuesByAlternateTerm = null)
where TLookup : IAopWikiIdentifiable, ITerm
where TEnum : struct
{
if (!typeof(TEnum).GetTypeInfo().IsEnum)
{
throw new ArgumentException($"{typeof(TEnum).Name} must be an enum type.");
}
return(lookupTerms.ToList()
.ToDictionary(
x => x.Id,
x =>
{
var enumMember = default(TEnum);
if (enumValuesByAlternateTerm?.TryGetValue(x.Term, out enumMember) ?? false)
{
return enumMember;
}
return UnsafeEnums.GetMember <TEnum>(GetEnumMemberName(x.Term), true)?.Value
?? throw new ArgumentException(
$"Could not find enum value {x.Term} in type {typeof(TEnum).Name}");
}));
}
public void UnsafeEnumsBasicTest()
{
TestHelper.ExpectException <ArgumentException>(() => UnsafeEnums.GetUnderlyingType <int>());
TestHelper.ExpectException <ArgumentException>(() => UnsafeEnums.GetUnderlyingType <Enum>());
TestHelper.ExpectException <ArgumentException>(() => UnsafeEnums.GetUnderlyingType <string>());
Assert.AreEqual(typeof(short), UnsafeEnums.GetUnderlyingType <DateFilterOperator>());
}
