public override bool GetNullable(ObjectMapper mapper, MemberAccessor member, out bool isSet)
{
// Check member [Nullable(true | false)]
//
NullableAttribute attr1 = member.GetAttribute <NullableAttribute>();
if (attr1 != null)
{
isSet = true;
return(attr1.IsNullable);
}
// Check member [NullValue(0)]
//
NullValueAttribute attr2 = member.GetAttribute <NullValueAttribute>();
if (attr2 != null)
{
return(isSet = true);
}
// Check type [Nullable(true || false)]
//
attr1 = (NullableAttribute)TypeHelper.GetFirstAttribute(
member.MemberInfo.DeclaringType, typeof(NullableAttribute));
if (attr1 != null)
{
isSet = true;
return(attr1.IsNullable);
}
// Check type [NullValues(typeof(int), 0)]
//
object[] attrs = member.GetTypeAttributes(typeof(NullValueAttribute));
foreach (NullValueAttribute a in attrs)
{
if (a.Type == null && a.Value != null && a.Value.GetType() == member.Type ||
a.Type != null && a.Type == member.Type)
{
return(isSet = true);
}
}
if (member.Type.IsEnum)
{
return(isSet = mapper.MappingSchema.GetNullValue(member.Type) != null);
}
return(base.GetNullable(mapper, member, out isSet));
}
public static string GetDescription(this NullableAttribute attr)
{
if (attr == null)
{
return("no attribute");
}
if (attr.Modes != null)
{
return("[" + string.Join(", ", attr.Modes.Select(x => x.GetDescription())) + "]");
}
return(attr.Mode.GetDescription());
}
public static bool?GetNullable(this NullableAttribute attr, int position = 0)
{
if (position > 0 && attr.NullableFlags.Length == 1)
{
position = 0;
}
var first = attr.NullableFlags[position];
return(first == 1 ? (bool?)false :
first == 2 ? (bool?)true :
null);
}
