public function getMany(array $ids, $class_name = '\\ORC\\DAO\\Table\\DataRow')
 {
     $this->checkValidDataRowClass($class_name);
     $dao = DaoFactory::get();
     $sql = 'SELECT * FROM ' . $this->_table->getTableName() . ' WHERE ' . $this->_table->getPrimaryKey() . ' in (' . implode(',', array_fill(0, count($ids), '?')) . ')';
     $dao->prepare($sql);
     $dao->execute($ids);
     $dao->setFetchMode(DAO::FETCH_CLASS | DAO::FETCH_PROPS_LATE, $class_name);
     $data = $dao->fetchAll(null);
     if ($data) {
         $data = new Table\DataList($data, $this->_table);
     }
     return $data;
 }