public ObjectReader(Type type, IEnumerable source, params string[] members)
{
if (source == null)
{
throw new ArgumentOutOfRangeException(nameof(source));
}
var noMemberParams = members == null || members.Length == 0;
_accessor = TypeAccessor.Create(type);
if (_accessor.GetMembersSupported)
{
// Sort members by ordinal first and then by name.
var typeMembers = _accessor
.GetMembers()
.OrderBy(p => p.Ordinal)
.ToList();
if (noMemberParams)
{
members = new string[typeMembers.Count];
for (int i = 0; i < members.Length; i++)
{
members[i] = typeMembers[i].Name;
}
}
_allowNull = new BitArray(members.Length);
_effectiveTypes = new Type[members.Length];
for (int i = 0; i < members.Length; i++)
{
Type memberType = null;
var allowNull = true;
var hunt = members[i];
foreach (var member in typeMembers)
{
if (member.Name == hunt)
{
if (memberType == null)
{
var tmp = member.Type;
memberType = Nullable.GetUnderlyingType(tmp) ?? tmp;
allowNull = !(memberType.IsValueType && memberType == tmp);
// but keep checking, in case of duplicates
}
else
{
memberType = null; // duplicate found; say nothing
break;
}
}
}
_allowNull[i] = allowNull;
_effectiveTypes[i] = memberType ?? typeof(object);
}
}
else if (noMemberParams)
{
throw new InvalidOperationException("Member information is not available for this type; the required members must be specified explicitly");
}
_current = null;
_memberNames = (string[])members.Clone();
_source = source.GetEnumerator();
}