/**
* Constructor
*
* This constructor will connect the driver so that methods like columnSql() and others
* will fail when the driver has not been connected.
*
* @param AbstractDriver $driver The driver to use.
*/
public function __construct(AbstractDriver $driver)
{
if (!$driver->isConnected()) {
$driver->connect();
}
$this->_driver = $driver;
}
/**
* Returns whether connection to database server was already established.
*
* @return bool
*/
public function isConnected()
{
return $this->_driver->isConnected();
}