Maintenance support for object oriented programs

N. Wilde, R. Huitt
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引用次数: 63

Abstract

Some of the difficulties that may be expected in the maintenance of software developed using the new object oriented languages are described. The concepts of inheritance and of polymorphism provide the great strengths of these languages but they also introduce difficulties in program analysis and understanding. The authors analyze problems of dynamic binding, object dependencies, dispersed program structure, control of polymorphism, high level understanding and detailed code understanding. Examples are presented based on code from the Smalltalk V environment. Recommendations are made for possible tool support, particularly using the concepts of dependency analysis, external dependency graphs, and clustering methodologies. Some suggestions are made concerning maintenance in firefighting situations, when a failed system must be brought back into service with a minimum of lost time.<>
面向对象程序的维护支持
描述了在使用新的面向对象语言开发的软件的维护中可能出现的一些困难。继承和多态性的概念为这些语言提供了巨大的优势,但它们也给程序分析和理解带来了困难。分析了动态绑定、对象依赖、分散程序结构、多态控制、高层次理解和详细代码理解等问题。本文给出了基于Smalltalk V环境代码的示例。对可能的工具支持提出了建议,特别是使用依赖关系分析、外部依赖关系图和聚类方法的概念。在消防情况下,当发生故障的系统必须在最短的时间内恢复使用时,对维护提出了一些建议。
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