basedistribuida.connection.HibernateSession.java Source code

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Here is the source code for basedistribuida.connection.HibernateSession.java

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/*
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package basedistribuida.connection;

import java.util.List;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import org.hibernate.Session;
import org.hibernate.SessionFactory;

/**
 *
 * @author USUARIO
 */
public abstract class HibernateSession {

    private SessionFactory sessionFactory;

    public HibernateSession() {
        sessionFactory = Connection.getSessionFactory();
    }

    public HibernateSession(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    protected int insert(Object clazz) {
        Session session = sessionFactory.openSession();
        int id = -1;
        try {
            session.beginTransaction();
            id = (int) session.save(clazz);
            session.getTransaction().commit();
        } finally {
            session.close();
        }
        return id;
    }

    protected boolean update(Object clazz) {
        Session session = sessionFactory.openSession();
        try {
            session.beginTransaction();
            session.update(clazz);
            session.getTransaction().commit();
        } finally {
            session.close();
        }
        return true;
    }

    protected boolean delete(Object clazz) {
        Session session = sessionFactory.openSession();
        try {
            session.beginTransaction();
            session.delete(clazz);
            session.getTransaction().commit();
        } finally {
            session.close();
        }
        return true;
    }

    protected <T> T getById(Class<T> clazz, int id) {
        Session session = sessionFactory.openSession();
        T generic;
        try {
            session.beginTransaction();
            generic = session.get(clazz, id);
            session.getTransaction().commit();
        } finally {
            session.close();
        }
        return generic;
    }

    protected <T> T getById(Class<T> clazz, String id) {
        Session session = sessionFactory.openSession();
        T generic;
        try {
            session.beginTransaction();
            generic = session.get(clazz, id);
            session.getTransaction().commit();
        } finally {
            session.close();
        }
        return generic;
    }

    //TODO: Analizar que excepcion da cuando se desconecta la maquina
    protected <T> List<T> getAll(Class<T> clazz) {
        Session session = sessionFactory.openSession();
        List<T> generics;
        try {
            session.beginTransaction();
            // UPDATED: Create CriteriaBuilder
            CriteriaBuilder builder = session.getCriteriaBuilder();

            // UPDATED: Create CriteriaQuery
            CriteriaQuery<T> criteria = builder.createQuery(clazz);

            // UPDATED: Specify criteria root
            criteria.from(clazz);

            // UPDATED: Execute query
            generics = session.createQuery(criteria).getResultList();

            session.getTransaction().commit();
        } finally {
            session.close();
        }
        return generics;
    }

    protected <T> List<T> getAllByQuery(Class<T> clazz, String query) {
        Session session = sessionFactory.openSession();
        List<T> generics;
        try {
            session.beginTransaction();

            generics = session.createSQLQuery(query).addEntity(clazz).list();

            session.getTransaction().commit();
        } finally {
            session.close();
        }
        return generics;
    }

    protected <T> T getFirstByQuery(Class<T> clazz, String query) {
        Session session = sessionFactory.openSession();
        T generic = null;
        try {
            session.beginTransaction();

            List list = session.createSQLQuery(query).addEntity(clazz).list();
            if (list != null && !list.isEmpty()) {
                generic = (T) list.get(0);
            }

            session.getTransaction().commit();
        } finally {
            session.close();
        }
        return generic;
    }

}