A research on a new utilization method of sofeware components

基于组件的软件开发(CBD)基于从先前存在的软件组件构建软件系统。在CBD中，以组件的形式重用公共部件可以降低新系统的开发成本，并减少与这些系统的支持相关的维护成本。然而，现有的程序通常是使用另一种范例构建的，例如面向对象(OO)范例。在CBD范型中，即使OO程序包含可重用的函数，也不能快速或有效地重用。提出了一种利用重构抽取组件从已有程序中抽取组件的方法。我们的重构技术可以从OO程序中识别和提取由类组成的可复用组件，并修改原始程序中提取的组件的周围部分。我们已经开发了一个自动执行重构并从Java程序中提取Java Bean组件的系统。评估实验的结果表明，我们的系统对于从Java程序中提取可复用构件和用例是有用的。

Component-based software development(CBD) is based on building software systems from previously-existing software components. In CBD, reuse of common parts in component form can reduce the development cost of new systems, and reduce the maintenance cost associate with the support of these systems. However, existing programs have usually been built using another paradigm, such as the Object-Oriented (OO) paradigm. OO programs cannot be reused rapidly or effectively in the CBD paradigm even if they contain reusable functions. We propose a technique for extracting components from existing 00 programs by our new refactoring Extract Component. Our technique of refactoring can identify and extract reusable components composed of classes from OO programs, and modify the surrounding parts of extracted components in original programs. We have developed a system that performs our refactoring automatically and extracts Java Beans components from Java programs. As a result of evaluation experiments, it is found that our system is useful for extracting reusable components along with usage examples from Java programs.