coursedaoimpl.java

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/*
 * CourseDaoImpl.java
 *
 * Created on 2006年5月20日, 下午11:26
 *
 * 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 CourseDaoImpl implements CourseDao{
    
    public Course get(Integer id) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            List list = session.createQuery("from Course where id=:id")
            .setParameter("id",id)
            .list();
            return list.isEmpty()?null:(Course)list.get(0);
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public void updateOrInsert(Course course) throws RecordExistException, DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            Transaction tran = session.beginTransaction();
            session.saveOrUpdate(course);
            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 Course where id=:id")
            .setParameter("id",id)
            .executeUpdate();
            tran.commit();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public List getByYearAndTerm(Integer year,String term) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            return session.createQuery("from Course where year=:year and term=:term")
            .setParameter("year",year)
            .setParameter("term",term)
            .list();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public List getByYearSortTerm(Integer year) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            return session.createQuery("from Course where year=:year order by term")
            .setParameter("year",year)
            .list();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public List getByYearAndTermAndTeacherId(Integer year,String term,Integer teacherId) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            return session.createQuery("from Course where year=:year and term=:term and TEACHER_ID=:teacherId")
            .setParameter("year",year)
            .setParameter("term",term)
            .setParameter("teacherId",teacherId)
            .list();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public List getByClassIdAndYearAndTerm(Integer classId,Integer year,String term) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            return session.createQuery("from Course where year=:year and term=:term and id in (select COURSE_ID from ClassCourse where CLASS_ID=:classId) order by id")
            .setParameter("year",year)
            .setParameter("term",term)
            .setParameter("classId",classId)
            .list();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
}