private Navigation showNextPartner(Key partnersKey) { List<Partner> partners = partnerManager.selectAll(); Partner partner = partnerManager.select(partnersKey); for (int i = 0; i < partners.size(); i++) { if (partners.get(i).getId().equals(partner.getId())) { if (i == partners.size() - 1) { requestScope("partner", partners.get(0)); requestScope("partnerKey", partners.get(0).getId()); } else { requestScope("partner", partners.get(i + 1)); requestScope("partnerKey", partners.get(i + 1).getId()); } return forward("show.jsp"); } } requestScope("partner", partner); requestScope("partnerKey", partner.getId()); return forward("show.jsp"); }