/**
* @return PDO returns PDO object based on configuration
*/
public static function getConnection()
{
if (self::$connection === null) {
if (self::$config === null) {
throw new RuntimeException('No config set, cannot create connection');
}
$config = self::$config;
self::$connection = new PDO($config->getDSN(), $config->getUsername(), $config->getPassword(), $config->getDriverOptions());
}
return self::$connection;
}
