/**
* Returns a concrete instance of a Driver class.
*
* Each driver class encapsulates creating a connection to a specific database.
*
* @param string $sDriver
* @return \MiniOrm\Driver
* @throws \MiniOrm\DbalException
* @throws \RuntimeException
*/
public function getInstance($sDriver)
{
$sClass = '\\' . __NAMESPACE__ . '\\' . self::PACKAGE_NAME . '\\' . $sDriver;
if (\class_exists($sClass)) {
$oDriver = new $sClass();
if ($oDriver instanceof Driver) {
return $oDriver;
} else {
//Code error, throwing runtime exceptin.
throw new \RuntimeException('Requested driver class does not implement the Driver interface. Class is ' . $sDriver);
}
} else {
//Incorrect class name provided by client code.
throw DbalException::driverNotFound($sDriver);
}
}
