streamdaohibernate.java.svn-base

菲律宾的一个大学的图书管理系统 spring+hibernate+velocity

/*
 * 创建日期 2005-5-17
 */
package biz.bluesky.pts.service.dao.impl;

import java.util.List;

import org.springframework.orm.ObjectRetrievalFailureException;

import biz.bluesky.pts.model.TStream;
import biz.bluesky.pts.service.dao.IStreamDAO;


public class StreamDAOHibernate extends BaseDAOHibernate implements IStreamDAO {

    //根据流编号查询流
    public TStream findStream(int streamId) {
        TStream stream = (TStream)getHibernateTemplate().get(TStream.class,new Integer(streamId));
        
        if(stream == null) {
            throw new ObjectRetrievalFailureException(TStream.class,new Integer(streamId));
        }
        
        return stream;
    }

    //根据流名称查询流
    public TStream findStream(String streamName) {
        List list = getHibernateTemplate().find("from TStream str where str.stream=?",streamName);
        
        if(list.size() < 1) {
            return null;
        }
        else {
            return (TStream)list.get(0);
        }
    }

    //查询所有的流
    public List findStreams() {
        return getHibernateTemplate().find("from TStream");
    }

    //保存流
    public void saveStream(TStream stream) {
        getHibernateTemplate().saveOrUpdate(stream);
        getHibernateTemplate().flush();
    }

    //删除流
    public void removeStream(int streamId) {
        TStream stream = findStream(streamId);
        getHibernateTemplate().delete(stream);
    }

}