Java tutorial
/** * This file is part of D.A.L.G.S. * * D.A.L.G.S 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. * * D.A.L.G.S 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 D.A.L.G.S. If not, see <http://www.gnu.org/licenses/>. */ package es.ucm.fdi.dalgs.mailbox.respository; import java.util.Collection; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.Query; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Repository; import es.ucm.fdi.dalgs.domain.MessageBox; @Repository public class MailBoxRepository { protected EntityManager em; protected static final Logger logger = LoggerFactory.getLogger(MailBoxRepository.class); public EntityManager getEntityManager() { return em; } @PersistenceContext public void setEntityManager(EntityManager entityManager) { try { this.em = entityManager; } catch (Exception e) { logger.error(e.getMessage()); } } public MessageBox getMessageBox(String code) { Query query = null; query = em.createQuery("select m FROM MessageBox m where m.code=?1"); query.setParameter(1, code); if (query.getResultList().isEmpty()) return null; else return (MessageBox) query.getSingleResult(); } @SuppressWarnings("unchecked") public Collection<? extends MessageBox> getAllMessages() { Query query = null; query = em.createQuery("FROM MessageBox m"); return query.getResultList(); } }