DAEF用户权限管理函数的实现

Implementation of the DAEF facility functions

为了保证数据仓中数据的安全 ,POSC在DAEF中定义了工具管理函数 ,实现对用户权限的管理 .在POSC的样本实现中 ,并没有给出这些函数的具体实现 .用G ++作为开发工具 ,采用面向对象的编程方法 ,分别开发了实现相应功能的类 ,这些类具有底层数据访问、中间数据传输和上层数据封装 3种功能 ;实现了满足POSC规范的用户权限管理函数 ,增强了POSC提供的DAEF样本实现的功能 .

In order to protect the data in the datastore, POSC define the facility functions in the DAEF to manage the power of users. In the DAEF sample implementation, these functions haven't been programmed. Using G++ as the developing tool and object oriented developing method, the classes to implement the functions are developed. There are three different classes: data access in the datastore, data transfer and the data encapsulation on the top. The facility functions have been implemented with conformance to the POSC standard. The function of DAEF sample implementation has been enhanced.functionshav