'Parse a new style object, creating it but not reading the file.'

@staticmethod
def _parse_object_header(magic, f):

    num_type = ((ord(magic[0:1]) >> 4) & 7)
    obj_class = object_class(num_type)
    if (not obj_class):
        raise ObjectFormatException(('Not    a    known    type    %d' % num_type))
    return obj_class()
