//public override object NullValue
//{
// get { throw new InvalidCastException("UnknownTypeHandler could not cast a null value in unknown type field."); }
//}
/// <summary>
/// Compares two values (that this handler deals with) for equality
/// </summary>
/// <param name="obj">one of the objects</param>
/// <param name="str">the other object as a String</param>
/// <returns>true if they are equal</returns>
public override bool Equals(object obj, string str)
{
if (obj == null || str == null)
{
return((string)obj == str);
}
ITypeHandler handler = _factory.GetTypeHandler(obj.GetType());
object castedObject = handler.ValueOf(obj.GetType(), str);
return(obj.Equals(castedObject));
}