example04.java

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import contacts.Folder;
import net.sf.hibernate.Session;
import net.sf.hibernate.SessionFactory;
import net.sf.hibernate.cfg.Configuration;
import net.sf.hibernate.tool.hbm2ddl.SchemaUpdate;

import java.util.List;

public class Example04
{

    public static void main(String[] args) throws Exception
    {

        // load configuration
        Configuration config = new Configuration();
        config.configure();

        // update database schema if required
        new SchemaUpdate(config).execute(true);

        // open a session
        SessionFactory sessionFactory = config.buildSessionFactory();
        Session session = sessionFactory.openSession();

        Folder myFolder = new Folder();
        myFolder.setFolderName("My Folder");

        Folder myPrivateFolder = new Folder();
        myPrivateFolder.setFolderName("My Private Folder");

        myFolder.addFolder(myPrivateFolder);

        System.out.println("add a folder with a nested owned folder to database...");
        try
        {
            session.saveOrUpdate(myFolder);

            session.flush();
            session.connection().commit();
        }
        catch (Exception e)
        {
            session.connection().rollback();
        }

        System.out.println("find all folders...");
        try
        {
            List folders = session.find("from java.lang.Object");

            session.flush();
            session.connection().commit();

            for (int i = 0; i < folders.size(); i++)
            {
                Folder folder = (Folder)folders.get(i);
                System.out.println("folder:" + folder);
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
            session.connection().rollback();
        }

        // close the session
        session.close();
        sessionFactory.close();

    }
}