分布对象计算中继承机制的研究

以Web,CORBA,Java,ActiveX以及对象一关系数据库的集成为先导,以Oracle的网络计算体系结构NCA(Network computing Arch:tecture,http:声www·Oracle com/nca)为实例,分布对象技术在经历了从单一环境、单一地址空间、单一语言的集中计算到客户/服务器(Client/Server)计算之后,正在进化为基于Internet/Intranet的以网络为中心的计算。“Inter-et最终无可置疑地将对象技术纳人计算技术的主流’,[1〕。以网络为中心决不简单地等同于以Internet/Intranet为中心,其深刻的内涵是:

On Inheritance Mechanism in Distributed Object Computing

It is the basic tendency of distributed object technique to evolve from centered-computing to Client/Server computing, and then to the net-centric computing. This paper first discusses the semantic characteristics of net-centric computing and the necessity of employing inheritatnce. Compared with the inheritance mechanism in centered-computing and Client/Server computing, also with the inheritance based on classes and the delegation based on prontotype, we propose multiview open inheritance as the inheritance mechnism of net-centric computing, in which the interface inheritance and the implementation inheritance are integrated.