java.math.BigInteger cannot be cast to com.labmanager.fw.data.bo.Lab,该如何处理

java.math.BigInteger cannot be cast to com.labmanager.fw.data.bo.Lab

package com.labmanager.fw.JUNIT;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.hibernate.SQLQuery;
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.labmanager.fw.data.bo.Lab;
import com.labmanager.fw.util.HibernateSessionFactory;

public class PageDeviceTest{

	public List getResultCount(String table){
		Session session=HibernateSessionFactory.getSession();
		Transaction ts=session.beginTransaction();
		List list=new ArrayList();
		String sql="select count(*) from "+table+" where id > 0";
		try{
			ts.begin();
			SQLQuery sqlQuery=session.createSQLQuery(sql); 
			list=sqlQuery.list();
			ts.commit();
			System.out.println("查询到数据"+list.get(0).toString()+"条");
		}catch(Exception e){
			ts.rollback();
			e.printStackTrace();
		}finally{
			HibernateSessionFactory.closeSession();
		}
		return list;
	}
	public void dispaly(){
		List list=new ArrayList();
		list=this.getResultCount("tblab");
		Iterator it=list.iterator();
		while(it.hasNext()){
			System.out.println(((Lab)it.next()).getName());
		}
	}
	public static void main(String[] args){
		new PageDeviceTest().dispaly();	
	}

}

&

Console输出：

查询到数据20条
Exception in thread "main" java.lang.ClassCastException: java.math.BigInteger cannot be cast to com.labmanager.fw.data.bo.Lab
at com.labmanager.fw.JUNIT.PageDeviceTest.dispaly(PageDeviceTest.java:40)
at com.labmanager.fw.JUNIT.PageDeviceTest.main(PageDeviceTest.java:44)


&
Lab类是Hibernate inverse 生成的。
主键类型为Short
配置文件如下
<hibernate-mapping>
    <class name="com.labmanager.fw.data.bo.Lab" table="tblab" catalog="labmanager">
        <id name="id" type="java.lang.Short">
            <column name="id" />
            <generator class="identity"></generator>
        </id>
        <many-to-one name="currriculum" class="com.labmanager.fw.data.bo.Currriculum" fetch="select">
            <column name="curriculumId" />
        </many-to-one>
        <property name="name" type="java.lang.String">
            <column name="name" />
        </property>
        <property name="profile" type="java.lang.String">
            <column name="profile" />
        </property>
        <property name="deviceNumbers" type="java.lang.Short">
            <column name="deviceNumbers" />