/**
  * Sets the default Zend_Db_Adapter for all Zend_Db_Table objects.
  *
  * @param Zend_Db_Adapter $db A Zend_Db_Adapter object.
  */
 public static final function setDefaultAdapter($db)
 {
     // make sure it's a Zend_Db_Adapter
     if (!$db instanceof Zend_Db_Adapter_Abstract) {
         throw new Zend_Db_Table_Exception('db object does not extend Zend_Db_Adapter_Abstract');
     }
     Zend_Db_Table::$_defaultDb = $db;
 }