key-next-trigger in adf

hi in my form I have this key-next-trigger validation how can I do this in adf


key-next-trigger in adf

key-next-trigger in adf

DECLARE
   passwd         varchar2(30);
   wrk_err_ind    varchar2(1);
   wrk_err_msg    varchar2(80);
   ws_user_stat   varchar2(32) := Null;
   BEGIN
      SELECT account_status
      INTO   :work.scr_accnt_stat
      FROM   dba_users
      WHERE  username = :work.scr_user;
   EXCEPTION
      when no_data_found THEN
           message('Invalid sign-on id/password; logon denied..');
           raise form_trigger_failure; 
   END;
	 IF :work.scr_accnt_stat = 'OPEN' and 
		  :work.scr_password  is null   then
		  message('Field must be entered');
		  raise form_trigger_failure;
	 END IF;
	 IF :work.scr_accnt_stat = 'OPEN' then
		  validate_pswd('G',
		            'dbusername',
		            null,
		            null,
		            passwd,
		            wrk_err_ind,
		            wrk_err_msg);
      IF nvl(wrk_err_ind,'N') = 'Y' THEN
         message(wrk_err_msg);
         raise form_trigger_failure;
      END IF;

end;

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am in jdeveloper 11.1.1.9.0