package com.ictelecom.portal.engine.utils;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
public class HibernateSessionFactory
{
/** The single instance of hibernate SessionFactory */
private static org.hibernate.SessionFactory sessionFactory;
/**
* disable contructor to guaranty a single instance
*/
private HibernateSessionFactory() {}
public static SessionFactory getInstance()
{
if (sessionFactory == null)
sessionFactory = sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
return sessionFactory;
}
/**
* Opens a session and will not bind it to a session context
* @return the session
*/
public Session openSession()
{
return sessionFactory.openSession();
}
/**
* Returns a session from the session context. If there is no session in the context it opens a session,
* stores it in the context and returns it.
* This factory is intended to be used with a hibernate.cfg.xml
* including the following property
* name="current_session_context_class">thread This would return
* the current open session or if this does not exist, will create a new
* session
*
* @return the session
*/
public Session getCurrentSession()
{
return sessionFactory.getCurrentSession();
}
/**
* closes the session factory
*/
public static void close()
{
if (sessionFactory != null)
sessionFactory.close();
sessionFactory = null;
}
}
