DAO.MessagesDAOImpl.java Source code

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Here is the source code for DAO.MessagesDAOImpl.java

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package DAO;

import java.util.Date;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

/**
 *
 * @author tbenoist
 */
@Repository
public class MessagesDAOImpl implements MessagesDAO {

    // Communication avec la BD
    @PersistenceContext(unitName = "Yaourt_PU")
    private EntityManager em;

    public EntityManager getEm() {
        return em;
    }

    public void setEm(EntityManager em) {
        this.em = em;
    }

    // Ecriture ====================================================================
    @Transactional
    @Override
    public int save(MessagesEntity m) {
        m = em.merge(m);
        em.persist(m);
        return m.getId();
    }

    @Transactional
    @Override
    public void update(MessagesEntity m) {
        em.merge(m);
    }

    @Transactional
    @Override
    public void delete(MessagesEntity m) {
        m = em.merge(m);
        em.remove(m);
    }

    // Lecture =====================================================================
    @Transactional(readOnly = true)
    @Override
    public MessagesEntity find(int id) {
        Query q = em.createQuery("SELECT m FROM MessagesEntity m where m.id = ?");
        q.setParameter(1, id);
        try {
            return (MessagesEntity) q.getSingleResult();
        } catch (NoResultException e) {
            return null;
        }
    }

    @Transactional(readOnly = true)
    @Override
    public List<MessagesEntity> findAll() {
        Query q = em.createQuery("SELECT m FROM MessagesEntity m");
        return q.getResultList();
    }

    /**
     * NOT YET IMPLEMENTED
     *
     * @param auteurId
     * @return
     */
    @Transactional(readOnly = true)
    @Override
    public List<MessagesEntity> findByAuteur(int auteurId) {
        Query q = em.createQuery("SELECT m FROM MessagesEntity m where m.emetteur.id = ?");
        q.setParameter(1, auteurId);
        return q.getResultList();
    }

    /**
     *
     * @param date
     * @return
     */
    @Transactional(readOnly = true)
    @Override
    public List<MessagesEntity> findByDate(Date date) {
        return null;
    }

    /**
     *
     * @param destinataireId
     * @return
     */
    @Transactional(readOnly = true)
    @Override
    public List<MessagesEntity> findByDestinataire(int destinataireId) {
        Query q = em.createQuery("SELECT m FROM MessagesEntity m where m.destinataire.id <> ?");
        q.setParameter(1, destinataireId);
        return q.getResultList();
    }

    /**
     *
     * @param destinataireId
     * @return
     */
    @Transactional(readOnly = true)
    @Override
    public List<MessagesEntity> findByPersonne(int auteurId, int destinataireId) {
        Query q = em.createQuery(
                "SELECT m FROM MessagesEntity m where (m.emetteur.id = ? AND m.destinataire.id = ?) OR  (m.emetteur.id = ? AND m.destinataire.id = ?)");
        q.setParameter(1, auteurId);
        q.setParameter(2, destinataireId);
        q.setParameter(3, destinataireId);
        q.setParameter(4, auteurId);

        return q.getResultList();
    }
}