Java tutorial
/* * This file is part of the CSNetwork Services (CSNS) project. * * Copyright 2012, Chengyu Sun (csun@calstatela.edu). * * CSNS is free software: you can redistribute it and/or modify it under the * terms of the GNU Affero General Public License as published by the Free * Software Foundation, either version 3 of the License, or (at your option) * any later version. * * CSNS is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for * more details. * * You should have received a copy of the GNU Affero General Public License * along with CSNS. If not, see http://www.gnu.org/licenses/agpl.html. */ package csns.web.validator; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import org.springframework.util.StringUtils; import org.springframework.validation.Errors; import org.springframework.validation.ValidationUtils; import org.springframework.validation.Validator; import csns.model.core.User; import csns.model.core.dao.UserDao; /** * This validator is for adding new users in user management. */ @Component public class AddUserValidator implements Validator { @Autowired UserDao userDao; @Override public boolean supports(Class<?> clazz) { return User.class.isAssignableFrom(clazz); } @Override public void validate(Object target, Errors errors) { User user = (User) target; Long id = user.getId(); ValidationUtils.rejectIfEmptyOrWhitespace(errors, "firstName", "error.field.required"); ValidationUtils.rejectIfEmptyOrWhitespace(errors, "lastName", "error.field.required"); ValidationUtils.rejectIfEmptyOrWhitespace(errors, "cin", "error.field.required"); String cin = user.getCin(); if (StringUtils.hasText(cin)) { User u = userDao.getUserByCin(cin); if (u != null && !u.getId().equals(id)) errors.rejectValue("cin", "error.user.cin.taken"); } String primaryEmail = user.getPrimaryEmail(); if (StringUtils.hasText(primaryEmail)) { User u = userDao.getUserByEmail(primaryEmail); if (u != null && !u.getId().equals(id)) errors.rejectValue("primaryEmail", "error.user.email.taken"); } } }