hql select new 自定义对象时报空指针异常

String hql = "select new fi.salesManagement.bean.PurchaseVo(f.inId as Id,f.ifoId as ifoId,i.UTime as time,f.ACurnum as count,f.inPrice as inprice) from PurchaseInStorageInfo f inner join PurchaseInStorage i with f.inId = i.inId and  f.delFlag = 0 and i.delFlag = 0 and f.AId = ? and f.sId = ?";
        String hql = "select new fi.salesManagement.bean.PurchaseVo(f.inId as Id,f.ifoId as ifoId,i.UTime as time,f.ACurnum as count,f.inPrice as inprice) from PurchaseInStorageInfo f, PurchaseInStorage i where f.inId = i.inId";
        List<PurchaseVo> PurchaseVoList = this.createQuery(getSession(), hql, values).list();

        private Long inId;
    private Long ifoId;
    private Date UTime;
    private Long ACurnum;
    private BigDecimal inPrice;

    public PurchaseVo(Long inId, Long ifoId, Date uTime, Long aCurnum,
            BigDecimal inPrice) {
        super();
        this.inId = inId;
        this.ifoId = ifoId;
        UTime = uTime;
        ACurnum = aCurnum;
        this.inPrice = inPrice;
    }