public boolean moveDown(String id) {
    Ida ida = idaDAOImpl.findUnique(" from Ida where id=?", id);
    String hql = " from Ida where _parentId = ? order by seq asc";
    List<Ida> list = idaDAOImpl.find(hql, ida.getParentId()); // 查询兄弟节点
    int position = list.indexOf(ida);
    if (position == (list.size() - 1)) {
      return false;
    }
    for (int i = list.size() - 1; i >= 0; i--) {
      Ida node = list.get(i);
      if (i == position) {
        // 于之前的节点seq互换
        Ida before = list.get(i + 1);
        int seq = node.getSeq();
        ida.setSeq(before.getSeq());
        before.setSeq(seq);

        idaDAOImpl.save(ida);
        return true;
      } else if (i > position) {
        node.setSeq(node.getSeq() + 1); // 所有当前节点之前的节点,seq-1;
      }
    }

    return false;
  }
 public IdaMappingBean(Ida ida) {
   setId(ida.getId());
   setStructName(ida.getStructName());
   setStructAlias(ida.getStructAlias());
   setMetadataId(ida.getMetadataId());
   setSeq(ida.getSeq());
   setXpath(ida.getXpath());
   if (ida.getType() != null) {
     if (ida.getLength() != null) {
       setType(ida.getType() + "(" + ida.getLength() + ")");
     } else {
       setType(ida.getType());
     }
   }
   setScale(ida.getScale());
   setLength(ida.getLength());
   setRequired(ida.getRequired());
   set_parentId(ida.getParentId());
   setInterfaceId(ida.getInterfaceId());
   setPotUser(ida.getPotUser());
   setPotDate(ida.getPotDate());
   setHeadId(ida.getHeadId());
   setVersion(ida.getVersion());
   setRemark(ida.getRemark());
 }