jsf - Disabling bean construction with a ThrowIllegalArgumentException -

how can disable (under circumstances) direct access group pages controlled single bean without using serlvets or filters? right have :

   public somebeancontroller() {     try {       facescontext.getcurrentinstance().getexternalcontext().redirect("/somewhere.xhtml");     } catch (exception e) {       e.printstacktrace();     }     throw new illegalargumentexception("direct access disabled...");    }     public somebeancontroller(integer someid) {      this.someid = someid;    } 

the default bean constructor redirect more appropriate page. other constructor called bean when need access group of pages.

thank's!