hql select new 自定义对象时报空指针错误

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;

	}