/**
* Returns an singleton instance of class.
*
* @return
*/
public static function getInstance()
{
if (is_null(self::$instance)) {
self::$instance = new ImprovedDBMS();
}
return self::$instance;
}
/**
* Returns corresponding instance of DBMS class.
*
* @return
*/
public static function getDBMS()
{
if (is_null(self::$dbmsInstance)) {
if (self::$IMPROVED) {
ImprovedDBMS::init(self::$config);
self::$dbmsInstance = ImprovedDBMS::getInstance();
} else {
DBMS::init(self::$config);
self::$dbmsInstance = DBMS::getInstance();
}
}
return self::$dbmsInstance;
}