Java tutorial
/** * Copyright (C) 2012-2015 52North Initiative for Geospatial Open Source * Software GmbH * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * * If the program is linked with libraries which are licensed under one of * the following licenses, the combination of the program with the linked * library is not considered a "derivative work" of the program: * * - Apache License, version 2.0 * - Apache Software License, version 1.0 * - GNU Lesser General Public License, version 3 * - Mozilla Public License, versions 1.0, 1.1 and 2.0 * - Common Development and Distribution License (CDDL), version 1.0 * * Therefore the distribution of the program linked with libraries licensed * under the aforementioned licenses, is permitted by the copyright holders * if the distribution is compliant with both the GNU General Public * License version 2 and the aforementioned licenses. * * 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 General * Public License for more details. */ package org.n52.sos.ds.hibernate.dao; import org.hibernate.Criteria; import org.hibernate.Session; import org.hibernate.criterion.Restrictions; import org.n52.sos.ds.hibernate.entities.Codespace; import org.n52.sos.ds.hibernate.util.HibernateHelper; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Hibernate data access class for codespace * * @author CarstenHollmann * @since 4.0.0 */ public class CodespaceDAO { private static final Logger LOGGER = LoggerFactory.getLogger(CodespaceDAO.class); /** * Get codespace object for identifier * * @param codespace * identifier * @param session * Hibernate session * @return Codespace object */ public Codespace getCodespace(final String codespace, final Session session) { Criteria criteria = session.createCriteria(Codespace.class) .add(Restrictions.eq(Codespace.CODESPACE, codespace)); LOGGER.debug("QUERY getCodespace(codespace): {}", HibernateHelper.getSqlString(criteria)); return (Codespace) criteria.uniqueResult(); } /** * Insert and/or get codespace object * * @param codespace * Codespace identifier * @param session * Hibernate session * @return Codespace object */ public Codespace getOrInsertCodespace(final String codespace, final Session session) { Codespace result = getCodespace(codespace, session); if (result == null) { result = new Codespace(); result.setCodespace(codespace); session.save(result); session.flush(); session.refresh(result); } return result; } }