Java tutorial
/* * Copyright (c) 2011 Brown Bag Consulting. * This file is part of the ExpressUI project. * Author: Juan Osuna * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License Version 3 * as published by the Free Software Foundation with the addition of the * following permission added to Section 15 as permitted in Section 7(a): * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY * Brown Bag Consulting, Brown Bag Consulting DISCLAIMS THE WARRANTY OF * NON INFRINGEMENT OF THIRD PARTY RIGHTS. * * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. * * The interactive user interfaces in modified source and object code versions * of this program must display Appropriate Legal Notices, as required under * Section 5 of the GNU Affero General Public License. * * You can be released from the requirements of the license by purchasing * a commercial license. Buying such a license is mandatory as soon as you * develop commercial activities involving the ExpressUI software without * disclosing the source code of your own applications. These activities * include: offering paid services to customers as an ASP, providing * services from a web application, shipping ExpressUI with a closed * source product. * * For more information, please contact Brown Bag Consulting at this * address: juan@brownbagconsulting.com. */ package com.expressui.sample.dao; import com.expressui.core.dao.EntityDao; import com.expressui.sample.entity.security.User; import org.springframework.stereotype.Repository; import org.springframework.transaction.annotation.Transactional; import javax.persistence.Query; import java.util.List; import static com.expressui.sample.dao.CacheSettings.setReadOnly; @Repository @SuppressWarnings("unchecked") public class UserDao extends EntityDao<User, Long> { @Override public List<User> findAll() { Query query = getEntityManager().createQuery("SELECT u FROM User u ORDER BY u.loginName"); setReadOnly(query); return query.getResultList(); } @Transactional @Override public void remove(User user) { Query query = getEntityManager() .createQuery("UPDATE Account a SET a.assignedTo = null WHERE a.assignedTo = :user"); query.setParameter("user", user); query.executeUpdate(); query = getEntityManager() .createQuery("UPDATE Contact c SET c.assignedTo = null WHERE c.assignedTo = :user"); query.setParameter("user", user); query.executeUpdate(); query = getEntityManager() .createQuery("UPDATE Opportunity o SET o.assignedTo = null WHERE o.assignedTo = :user"); query.setParameter("user", user); query.executeUpdate(); super.remove(user); } }