/**
  * Constructor for SharedAlbums.
  *
  * @param parameters The parameters necessaries for load the page.
  */
 public SharedAlbums(final PageParameters parameters) {
   super(parameters);
   if (parameters.getNamedKeys().contains("user")) {
     final String email = parameters.get("user").toString();
     User user = new User();
     user.setEmail(email);
     if (userService.getUser(user) == null) {
       throw new RestartResponseException(ErrorPage404.class);
     }
     this.user = user;
     add(new AjaxDataView("dataContainer", "navigator", createShareDataView()));
   } else {
     throw new RestartResponseException(ErrorPage404.class);
   }
 }