es.ucm.fdi.dalgs.topic.repository.TopicRepository.java Source code

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Here is the source code for es.ucm.fdi.dalgs.topic.repository.TopicRepository.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.topic.repository;

import java.util.Collection;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
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;
import es.ucm.fdi.dalgs.domain.Module;
import es.ucm.fdi.dalgs.domain.Topic;

@Repository
public class TopicRepository {

    protected EntityManager em;

    public EntityManager getEntityManager() {
        return em;
    }

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

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

        }
    }

    public boolean addTopic(Topic topic) {
        try {
            em.persist(topic);
        } catch (ConstraintViolationException e) {
            logger.error(e.getMessage());
            return false;
        }

        return true;
    }

    @SuppressWarnings("unchecked")
    public List<Topic> getAll() {
        return em.createQuery("select t from Topic t where t.isDeleted = false order by t.id ").getResultList();
    }

    public boolean saveTopic(Topic topic) {
        try {
            em.merge(topic);
        } catch (ConstraintViolationException e) {
            logger.error(e.getMessage());
            return false;
        }
        return true;
    }

    public Topic getTopicFormatter(Long id) {
        return em.find(Topic.class, id);
    }

    public Topic getTopic(Long id, Long id_module, Long id_degree) {
        Module module = em.getReference(Module.class, id_module);
        Degree degree = em.getReference(Degree.class, id_degree);
        Query query = em
                .createQuery("select t from Topic t where t.id=?1 and t.module = ?2 and t.module.degree=?3");
        query.setParameter(1, id);
        query.setParameter(2, module);
        query.setParameter(3, degree);

        if (query.getResultList().isEmpty())
            return null;
        else
            return (Topic) query.getSingleResult();
    }

    public boolean deleteTopic(Topic topic) {
        try {
            topic.setDeleted(true);
            em.merge(topic);

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

    public String getNextCode() {
        return "";
    }

    public Topic existByCode(String code, Long id_module) {
        Module module = em.getReference(Module.class, id_module);
        Query query = em.createQuery("select t from Topic t where t.info.code=?1 and t.module = ?2");
        query.setParameter(1, code);
        query.setParameter(2, module);
        if (query.getResultList().isEmpty())
            return null;
        else
            return (Topic) query.getSingleResult();
    }

    @SuppressWarnings("unchecked")
    public Collection<Topic> getTopicsForModule(Long id, Boolean show) {
        Module module = em.getReference(Module.class, id);
        if (show) {
            Query query = em.createQuery("select t from Topic t where t.module=?1");
            query.setParameter(1, module);

            return (List<Topic>) query.getResultList();
        } else {

            Query query = em.createQuery("select t from Topic t where t.module=?1 and t.isDeleted='false'");
            query.setParameter(1, module);

            return (List<Topic>) query.getResultList();

        }
    }

    @SuppressWarnings("unchecked")
    public Collection<Topic> getTopicsForModules(Collection<Module> modules) {
        Query query = em.createQuery("SELECT t  FROM Topic t WHERE t.isDeleted = false  AND t.module in ?1");
        query.setParameter(1, modules);

        if (query.getResultList().isEmpty())
            return null;
        else
            return (Collection<Topic>) query.getResultList();

    }

    public boolean deleteTopicsForModules(Collection<Module> modules) {
        try {

            Query query = em.createQuery("UPDATE Topic t SET t.isDeleted = true where t.module IN ?1");
            query.setParameter(1, modules);
            query.executeUpdate();
            return true;
        } catch (Exception e) {
            logger.error(e.getMessage());
            return false;
        }

    }

    public boolean deleteTopicsForModule(Module module) {
        try {

            Query query = em.createQuery("UPDATE Topic t SET t.isDeleted = true where t.module = ?1");
            query.setParameter(1, module);
            query.executeUpdate();
            return true;
        } catch (Exception e) {
            logger.error(e.getMessage());
            return false;
        }
    }

    public boolean persistListTopics(List<Topic> topics) {

        int i = 0;
        for (Topic t : topics) {
            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);

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

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

        return true;

    }

}