teacherdaoimpl.java

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/*
 * TeacherDaoImpl.java
 *
 * Created on 2006年5月20日, 下午8:24
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package enova.orm.hibernate.daoImpl;

import enova.dao.*;
import enova.pojo.*;
import java.util.*;
import org.hibernate.*;
import enova.util.*;

/**
 *
 * @author vlinux
 */
public class TeacherDaoImpl implements TeacherDao{
    
    public Teacher get(Integer id) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            List list = session.createQuery("from Teacher where id=:id").setParameter("id",id).list();
            return list.isEmpty()?null:(Teacher)list.get(0);
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public void updateOrInsert(Teacher teacher) throws RecordExistException, DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            if( teacher.getId()==null ){
                List list = session.createQuery("from Teacher where username=:username")
                .setParameter("username",teacher.getUsername()).list();
                if( !list.isEmpty() )
                    throw new RecordExistException("the teacher's username was existed");
            }
            Transaction tran = session.beginTransaction();
            session.saveOrUpdate(teacher);
            tran.commit();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public void delete(Integer id) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            Transaction tran = session.beginTransaction();
            session.createQuery("delete from Teacher where id=:id")
            .setParameter("id",id).executeUpdate();
            tran.commit();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public Teacher loginVerify(String username,String password) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            List list = session.createQuery("from Teacher where username=:username and password=:password")
            .setParameter("username",username)
            .setParameter("password",password)
            .list();
            return list.isEmpty()?null:(Teacher)list.get(0);
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public List getByNameAndUsername(String name,String username) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            return session.createQuery("from Teacher where name like :name and username =:username")
            .setString("name","%"+name+"%")
            .setParameter("username",username)
            .list();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public List getByNameSortId(String name) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            return session.createQuery("from Teacher where name like :name order by id")
            .setString("name","%"+name+"%")
            .list();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public List getByUsernameSortName(String username) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            return session.createQuery("from Teacher where username=:username order by name")
            .setParameter("username",username)
            .list();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public void changePassword(String username,String oldPassword,String newPassword) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            Transaction tran = session.beginTransaction();
            session.createQuery("update from Teacher set password=:newPassword where username=:username and password=:oldPassword")
            .setParameter("newPassword",newPassword)
            .setParameter("oldPassword",oldPassword)
            .setParameter("username",username)
            .executeUpdate();
            tran.commit();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
}