The Research And Application On The Construction Of Design Pattern Library

The design pattern is an excellent design thought in essence. It can be used to optimize the structure of software system, enhance the reusability and robustness of software. It is useful for solving the"crisis of software"in some extent. A problem when we using design pattern is how to transmit it from designer to user. The design pattern library is one of the solutions to this problem. It regards the exquisite design patterns as reusable components and storage them by some methods for the use of others. How to effectively storage and retrieve the patterns has been a tickler faced by people.In this thesis, we merges the thought of construction of component library and elaborates the skeleton of the design pattern library's establishment, which includes storage, maintenance and retrieval. On the problem of storage, we propose the faced classification and XML description file-based transmission, which completely depicts the space of design pattern library. On the problem of maintenance, the procedures of recognition, modification, deletion on the products and the change of faces are described and some ideas in detail are discussed. On the problem of retrieval, we propose the three-step retrieval referring to the thought of simple retrieval, level-information coding and vague mathematics, which can be used to retrieve the design patterns with better results. In the last part, an example is given to show the steps and display the method of constructing design pattern library on the side face.