一种可重用构件的设计方法

随着计算机硬件的迅猛发展，软件变得越来越复杂，如何迅速高效地开发出易扩展、易维护、对需求变化具有适应性的软件成为一个急需解决的问题，基于构件的开发是解决这一问题的良好思路，而可重用构件及其结构的设计与优化是其中的关键，首先对现有的构件设施地简要介绍和评价，对构件模型进行卫定义，并给出了玫般情况下构件设计的步骤，然后在此基础上，用定性与定量相结合的方式，给出了玫种标识和设计构件的方法，以及相应的算法

A DESIGN METHOD FOR REUSABLE COMPONENTS

With the swift and violent development of hardware, software has become more and more complex. How to rapidly develop maintainable, extensible and adaptable software that meets the changeable requirements is becoming a pressing problem. As everyone knows, component|based development offers a better means to solve the problem. The critical point of that way is the design of reusable component. Much effort has been made to design component and to optimize component structure, without sound results. To obtain well structured components and component library, a method for reusable component design is presented in this paper, which is better than the existing method. At the beginning, several existing design methods of reusable component are discussed and evaluated briefly. A component model is defined and the common designing steps are given, and then the new method including some algorithms is introduced in detail, which combines quantitative analysis with qualitative analysis. With that method, one can identify and optimize the inheritance and aggregation structures of class components quickly. And the automatically supporting tools can be constructed easily. After that, some problems existing in the construction and evolution of component library are discussed. Several cases in practice are also presented briefly.