上游充通大兽 1.Overview SHANGHAI JIAO TONG UNIVERSITY Object design is situated between system design and implementation.Object design is not very well understood and if not well done,leads to a bad system implementation. In this lecture,we describe a selection of transformations to illustrate a disciplined approach to implementation to avoid system degradation. 1.Operations on the object model: Optimizations to address performance requirements 2.Implementation of class model components: Realization of associations Realization of operation contracts 3.Realizing entity objects based on selected storage strategy Mapping the class model to a storage schema Software EngineeringSoftware Engineering 1. Overview Object design is situated between system design and implementation. Object design is not very well understood and if not well done, leads to a bad system implementation. In this lecture, we describe a selection of transformations to illustrate a disciplined approach to implementation to avoid system degradation. 1. Operations on the object model: • Optimizations to address performance requirements 2. Implementation of class model components: • Realization of associations • Realization of operation contracts 3. Realizing entity objects based on selected storage strategy • Mapping the class model to a storage schema