AdminHibernateDAO.java

package bce.server.dao.hibernate;

import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Restrictions;

import bce.server.dao.AdminDAO;
import bce.server.entities.PersistentAdmin;

/**
 * 管理员实体类DAO的Hibernate实现
 *
 * @author robins
 *
 */
public class AdminHibernateDAO implements AdminDAO {

    private SessionFactory factory;

    public void setFactory(SessionFactory factory) {
        this.factory = factory;
    }

    public AdminHibernateDAO() {}

    /*
     * (non-Javadoc)
     * @see bce.server.dao.AdminDAO#get(java.lang.Integer)
     */
    @Override
    public PersistentAdmin get(Integer adminId) {

        Session session = factory.openSession();
        return (PersistentAdmin) session.get(PersistentAdmin.class, adminId);
    }

    /*
     * (non-Javadoc)
     * @see bce.server.dao.AdminDAO#get(java.lang.String)
     */
    @SuppressWarnings("unchecked")
    @Override
    public PersistentAdmin get(String adminName) {

        Session session = factory.openSession();
        Criteria criteria = session.createCriteria(PersistentAdmin.class);
        criteria.add(Restrictions.eq("adminName", adminName));
        List<PersistentAdmin> resultList = (List<PersistentAdmin>) criteria.list();

        if (resultList.isEmpty())
            return null;

        return resultList.get(0);
    }

    /*
     * (non-Javadoc)
     * @see bce.server.dao.AdminDAO#add(bce.server.entities.PersistentAdmin)
     */
    @Override
    public void add(PersistentAdmin admin) {

        Session session = factory.openSession();
        session.beginTransaction();
        session.save(admin);
        session.getTransaction().commit();

        if (session.isOpen())
            session.close();
    }

    /*
     * (non-Javadoc)
     * @see bce.server.dao.AdminDAO#update(bce.server.entities.PersistentAdmin)
     */
    @Override
    public void update(PersistentAdmin admin) {

        Session session = factory.openSession();
        session.beginTransaction();
        session.update(session.merge(admin));
        session.getTransaction().commit();

        if (session.isOpen())
            session.close();
    }

    /*
     * (non-Javadoc)
     * @see bce.server.dao.AdminDAO#delete(bce.server.entities.PersistentAdmin)
     */
    @Override
    public void delete(PersistentAdmin admin) {

        Session session = factory.openSession();
        session.beginTransaction();
        session.delete(session.merge(admin));
        session.getTransaction().commit();

        if (session.isOpen())
            session.close();
    }

}