上游究通大粤 Characteristics of Object Design Activities SHANGHAI JIAO TONG UNIVERSITY Developers perform transformations to the object model to improve its modularity and performance. Developers transform the associations of the object model into collections of object references,because programming languages do not support the concept of association. If the programming language does not support contracts,the developer needs to write code for detecting and handling contract violations. Developers often revise the interface specification to accommodate new requirements from the client. All these activities are intellectually not challenging However,they have a repetitive and mechanical flavor that makes them error prone. Software EngineeringSoftware Engineering Characteristics of Object Design Activities Developers perform transformations to the object model to improve its modularity and performance. Developers transform the associations of the object model into collections of object references, because programming languages do not support the concept of association. If the programming language does not support contracts, the developer needs to write code for detecting and handling contract violations. Developers often revise the interface specification to accommodate new requirements from the client. All these activities are intellectually not challenging • However, they have a repetitive and mechanical flavor that makes them error prone