CountServiceImpl.java

/*
 * Copyright (C) 2014 anonymous
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.yf.kp.service.impl;

import com.yf.kp.service.CountService;
import com.yf.kp.utility.HibernateUtil;
import javax.swing.JOptionPane;
import org.hibernate.HibernateException;
import org.hibernate.Query;

/**
 *
 * @author anonymous
 */
public class CountServiceImpl extends HibernateUtil implements CountService {

    @Override
    public Long countKelas() {
        Object jml = 0;
        connect();
        try {
            Query q = manager().createQuery("SELECT COUNT(K.id) AS jml FROM Kelas K");
            jml = q.uniqueResult();
            commit();
        } catch (HibernateException e) {
            JOptionPane.showMessageDialog(null, e.getMessage());
            rollback();
        } finally {
            close();
        }
        return (Long) jml;
    }

}