[IBATISNET-294] Nullable<Enum> not suported

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: DataMapper 1.6.2
• Component/s: DataMapper
• Assignee: Unassigned
• Reporter: Dusan Musak
• Created: 21/Sep/09 09:12
• Updated: 21/Sep/09 09:12

Description

I have the following problem with EnumTypeHandler:

I have an Enum like this:
public Enum MyEnum:short

{ A, B, C }

and an object with property, which is defined as an Nullable<MyEnum>
public MyEnum? PropertyMyEnum

{ get; set; }

– nullable enum. Result map has defined type : MyEnum

When I try to load list of objects, I get the following exception, when an object is not DBNull in DB:
Exception: ArgumentException Type provided must be an Enum.

in EnumTypeHandler class in method GetValueByIndex on line 97:
Enum.Parse(mapping.MemberType, dataReader.GetValue(mapping.ColumnIndex).ToString())

I think, that NullableEnumTypeHandler should be defined with code like this:

public override object GetValueByIndex(ResultProperty mapping, IDataReader dataReader)
{
if (dataReader.IsDBNull(mapping.ColumnIndex) == true)

{ return DBNull.Value; }

else
{
if (mapping.MemberType.IsGenericType && mapping.MemberType.GetGenericTypeDefinition().Equals(typeof(Nullable<>))

{ Type enumType = Nullable.GetUnderlyingType(mapping.MemberType); return Enum.Parse(enumType, dataReader.GetValue(mapping.ColumnIndex).ToString()); }

return Enum.Parse(mapping.MemberType, dataReader.GetValue(mapping.ColumnIndex).ToString());
}
}