Component Library Component Retrieval Theory

The software development method that based on component reuse is one of the available ways to resolve the crisis of software, and the component library plays an important role in this development. How to improve the efficiency of retrieving in internet-mode is an important research in this paper .This paper mainly analyses the schema of classification , retrieval and managing of reusable components in a internet- based component library . And the question of how to improve the efficiency of retrieving is also discussed. The concept of reusable component , theory model of component and concept model of component library are introduced in this thesis firstly, and expatiate how to represent the reusable component of different arrangement, different form , different representation in one express. Then the schema of storage is also discussed. As for storage mode, component entities and description information are stored separately. Component entities are stored in files and description information is stored in database. And the main schema of classification used in our component library is also introduced. The reasonable system of classification is the key of retrieval efficiency. And how to classify the reusable components in internet-mode and how to customize and maintain the system of classification are discussed in follow. And next, this paper studies how to retrieve the reusable component in various ways. Then the retrieving system of reusable components is introduced, and realization of the retrieving mechanism of reusable components is described. Based on these schema ,we designed the component retrieval tools, which support not only the various mode of retrieving and browsing but also the managing and maintaining of component with the corresponding classification system. At the same time, a more reasonable scheme for feedback of component is designed in involved tools, in order to measure and analyze better. The system of component library introduced in this paper is adopted three-lay B/S system frame. The part of dealing with page is completed by ASP program associated with JavaScript language. The part of application function is realized by technology of ASP and COM module together. At the end of this thesis, the way of system's realization is introduced with the example of implement of the retrieving tool of component, and some technical problems and their solution are discussed.