/**
  * Gets connected player
  * @param boolean $assertConnected Specifies if player has to be connected (throw excpeptoin if not 
  * @return Player The logged Player
  */
 public function getConnectedPlayer($assertConnected = true)
 {
     if (!isset(AuthenticationTool::$connectedPlayer)) {
         if ($assertConnected) {
             AuthenticationTool::getInstance()->assertPlayerConnected();
         }
         AuthenticationTool::$connectedPlayer = OsteoFactory::getElement('Player', SessionTool::getInstance()->getParameter(AuthenticationTool::SESSION_PLAYER_ID));
     }
     return AuthenticationTool::$connectedPlayer;
 }