ScreenDAO.java

package org.societies.webapp.dao;

/**
 * Copyright (c) 2011, SOCIETIES Consortium (WATERFORD INSTITUTE OF TECHNOLOGY (TSSG), HERIOT-WATT UNIVERSITY (HWU), SOLUTA.NET 
 * (SN), GERMAN AEROSPACE CENTRE (Deutsches Zentrum fuer Luft- und Raumfahrt e.V.) (DLR), Zavod za varnostne tehnologije
 * informacijske družbe in elektronsko poslovanje (SETCCE), INSTITUTE OF COMMUNICATION AND COMPUTER SYSTEMS (ICCS), LAKE
 * COMMUNICATIONS (LAKE), INTEL PERFORMANCE LEARNING SOLUTIONS LTD (INTEL), PORTUGAL TELECOM INOVAÇÃO, SA (PTIN), IBM Corp., 
 * INSTITUT TELECOM (ITSUD), AMITEC DIACHYTI EFYIA PLIROFORIKI KAI EPIKINONIES ETERIA PERIORISMENIS EFTHINIS (AMITEC), TELECOM 
 * ITALIA S.p.a.(TI),  TRIALOG (TRIALOG), Stiftelsen SINTEF (SINTEF), NEC EUROPE LTD (NEC))
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
 * conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.societies.webapp.model.Screen;

public class ScreenDAO implements IScreenDAO{

    private final Logger log = LoggerFactory.getLogger(ScreenDAO.class);
    private SessionFactory sessionFactory;
    
    public ScreenDAO(SessionFactory sessionFactory){
    	this.sessionFactory=sessionFactory;
    }



    @Override
    public void save(Screen screen) {
        Session session = sessionFactory.openSession();
        Transaction transaction = null;
        try {
            transaction = session.beginTransaction();
            session.save(screen);
            transaction.commit();
        }catch (HibernateException e) {
            transaction.rollback();
            e.printStackTrace();
        } finally {
            session.close();
        }
    }

    @Override
    public void update(Screen screen) {
    }

    @Override
    public void deleteScreens(Screen screen) {
        Session session = sessionFactory.openSession();
        Transaction transaction = null;
        try {
            transaction = session.beginTransaction();
                session.delete(screen);
                transaction.commit();

        } catch (HibernateException e){
            transaction.rollback();
            e.printStackTrace();
            log.debug(e.toString());
        } finally{
            session.close();
        }
    }

    @Override
    public List<Screen> getAllScreens() {

        Session session = sessionFactory.openSession();
        Transaction transaction = null;
        List<Screen> screens = null;
        try {
            transaction = session.beginTransaction();
            screens = session.createQuery(" from  " + Screen.class.getName()).list();
             transaction.commit();
        } catch (HibernateException e){
            transaction.rollback();
            e.printStackTrace();
            log.debug(e.toString());
        } finally{
            session.close();
        }
        return screens;
    }
}