<?php
class Factory {
  private static $db = null;
  private static $mainTemplate = null;
  private static $skeleton = null;
  private static $request = null;

  public static function getDB() {
    if(is_null(Factory::$db))
      Factory::$db = new DataAccess();
    return Factory::$db;
  }

  public static function getSkeleton() {
    if(is_null(Factory::$skeleton))
      Factory::$skeleton = new Skeleton();
    return Factory::$skeleton;
  }

  public static function getRequete() {
    if(is_null(Factory::$request))
        Factory::$request = new Requete();
    return Factory::$request;
  }
}