com.arnau.persistencia.hibernate.HibernateUtil.java Source code

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Here is the source code for com.arnau.persistencia.hibernate.HibernateUtil.java

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package com.arnau.persistencia.hibernate;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.context.internal.ThreadLocalSessionContext;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

public class HibernateUtil {

    private static SessionFactory sessionFactory;

    public static synchronized void buildSessionFactory() {
        if (sessionFactory == null) {
            Configuration configuration = new Configuration();
            configuration.configure();
            configuration.setProperty("hibernate.current_session_context_class", "thread");
            configuration.setProperty("hibernate.dialect", "org.hibernate.dialect.HSQLDialect");
            ServiceRegistry serviceRegistry = new ServiceRegistryBuilder()
                    .applySettings(configuration.getProperties()).buildServiceRegistry();
            sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        }
    }

    public static void openSessionAndBindToThread() {
        Session session = sessionFactory.openSession();
        ThreadLocalSessionContext.bind(session);
    }

    public static SessionFactory getSessionFactory() {
        if (sessionFactory == null) {
            buildSessionFactory();
        }
        return sessionFactory;
    }

    public static void closeSessionAndUnbindFromThread() {
        Session session = ThreadLocalSessionContext.unbind(sessionFactory);
        if (session != null) {
            session.close();
        }
    }

    public static void closeSessionFactory() {
        if ((sessionFactory != null) && (sessionFactory.isClosed() == false)) {
            sessionFactory.close();
        }
    }

    public static void crearBD() {
        Configuration configuration = new Configuration();
        configuration.configure();
        configuration.setProperty("hibernate.current_session_context_class", "thread");
        configuration.setProperty("hibernate.dialect", "org.hibernate.dialect.HSQLDialect");
        //Si segundo parmetro del mtodo create est a true, Hibernate crea la BD pero borra los datos
        new org.hibernate.tool.hbm2ddl.SchemaExport(configuration).setOutputFile("script.sql").setDelimiter(";")
                .create(true, true);
    }
}