es.ucm.fdi.dalgs.degree.repository.DegreeRepository.java Source code

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Here is the source code for es.ucm.fdi.dalgs.degree.repository.DegreeRepository.java

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/**
 * 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.degree.repository;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceException;
import javax.persistence.Query;

import org.hibernate.exception.ConstraintViolationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Repository;

import es.ucm.fdi.dalgs.domain.Degree;

@Repository
public class DegreeRepository {
    protected EntityManager em;

    private static final Integer noOfRecords = 5;

    public EntityManager getEntityManager() {
        return em;
    }

    protected static final Logger logger = LoggerFactory.getLogger(DegreeRepository.class);

    @PersistenceContext
    public void setEntityManager(EntityManager entityManager) {
        try {
            this.em = entityManager;
        } catch (Exception e) {
            logger.error(e.getMessage());

        }
    }

    public boolean addDegree(Degree degree) {
        try {
            em.persist(degree);
        } catch (PersistenceException e) {
            logger.error(e.getMessage());
            return false;
        }

        return true;
    }

    @SuppressWarnings("unchecked")
    public List<Degree> getAll() {

        return em.createQuery("select d from Degree d where d.isDeleted = false order by d.id ").getResultList();

    }

    public boolean saveDegree(Degree degree) {
        try {
            em.merge(degree);
        } catch (ConstraintViolationException e) {
            logger.error(e.getMessage());
            return false;
        }
        return true;
    }

    public Degree getDegree(Long id) {

        return em.find(Degree.class, id);
    }

    public boolean deleteDegree(Degree degree) {
        // Degree degree = em.getReference(Degree.class, id);
        try {
            degree.setDeleted(true);
            em.merge(degree);

            return true;
        } catch (Exception e) {
            logger.error(e.getMessage());
            return false;
        }
    }

    // public Degree getDegreeSubject(Subject p) {
    // Query query = em
    // .createQuery("select d from Degree d join d.subjects s where s=?1");
    // query.setParameter(1, p);
    // if (query.getResultList().isEmpty())
    // return null;
    // return (Degree) query.getSingleResult();
    // }

    public String getNextCode() {
        Query query = em.createQuery("Select MAX(e.id ) from Degree e");
        try {
            Long aux = (Long) query.getSingleResult() + 1;
            return "DEG" + aux;
        } catch (Exception e) {
            logger.error(e.getMessage());

            return null;
        }

    }

    public Degree existByCode(String code) {
        Query query = em.createQuery("select d from Degree d where d.info.code=?1");
        query.setParameter(1, code);
        if (query.getResultList().isEmpty())
            return null;
        else
            return (Degree) query.getSingleResult();
    }

    @SuppressWarnings("unchecked")
    public List<Degree> getDegrees(Integer pageIndex, Boolean showAll) {
        Query query = null;

        if (showAll)
            query = em.createQuery("select a from Degree a  order by a.id DESC");
        else
            query = em.createQuery("select a from Degree a  where a.isDeleted='false' order by a.id DESC");

        if (query.getResultList().isEmpty())
            return null;

        return query.setMaxResults(noOfRecords).setFirstResult(pageIndex * noOfRecords).getResultList();

    }

    public Integer numberOfPages(Boolean showAll) {
        Query query = null;
        if (showAll)
            query = em.createNativeQuery("select count(*) from degree");
        else
            query = em.createNativeQuery("select count(*) from degree where isDeleted='false'");

        logger.info(query.getSingleResult().toString());
        double dou = Double.parseDouble(query.getSingleResult().toString()) / ((double) noOfRecords);
        return (int) Math.ceil(dou);
    }

    public boolean persistListDegrees(List<Degree> degrees) {

        int i = 0;
        for (Degree d : degrees) {
            try {

                // In this case we have to hash the password (SHA-256)
                // StringSHA sha = new StringSHA();
                // String pass = sha.getStringMessageDigest(u.getPassword());
                // u.setPassword(pass);

                d.setId(null); // If not a detached entity is passed to persist
                em.persist(d);
                // em.flush();

                if (++i % 20 == 0) {
                    em.flush();
                }
            } catch (Exception e) {
                logger.error(e.getMessage());
                return false;
            }
        }

        return true;

    }
}