rootdaoimpl.java

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/*
 * RootDaoImpl.java
 *
 * Created on 2006年5月20日, 下午7:54
 *
 * 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 RootDaoImpl implements RootDao{
    
    public Root get(Integer id) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            List list = session.createQuery("from Root where id=:id").setParameter("id",id).list();
            return list.isEmpty()?null:(Root)list.get(0);
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public void updateOrInsert(Root root) throws RecordExistException, DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            if( root.getId()==null ){
                List list = session.createQuery("from Root where username=:username")
                .setParameter("username",root.getUsername()).list();
                if( !list.isEmpty() )
                    throw new RecordExistException(" the root's username was existed.");
            }
            Transaction tran = session.beginTransaction();
            session.saveOrUpdate(root);
            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 Root where id=:id")
            .executeUpdate();
            tran.commit();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public List getAll() throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            return session.createQuery("from Root").list();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public List getByUsername(String username) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            return session.createQuery("from Root where username=:username")
            .setParameter("username",username).list();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
    public Root loginVerify(String username,String password) throws DataAccessException{
        try{
            Session session = HibernateUtil.currentSession();
            List list = session.createQuery("from Root where username=:username and password=:password")
            .setParameter("username",username)
            .setParameter("password",password)
            .list();
            return list.isEmpty()?null:(Root)list.get(0);
        }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 Root set password=:newPassword where username=:username and password=:oldPassword")
            .setParameter("newPassword",newPassword)
            .setParameter("username",username)
            .setParameter("oldPassword",oldPassword)
            .executeUpdate();
            tran.commit();
        }catch(HibernateException he){
            throw new DataAccessException(he.toString());
        }finally{
            HibernateUtil.closeSession();
        }
    }
    
}