/**
* include the given class and return always the same instance
*
* @param string $selector the jelix selector correponding to the class
* @return object an instance of the classe
*/
public static function getService($selector)
{
$sel = new Selector\ClassSelector($selector);
$s = $sel->toString();
if (isset(self::$_instances[$s])) {
return self::$_instances[$s];
} else {
$o = self::create($selector);
self::$_instances[$s] = $o;
return $o;
}
}
