you were asked to draw an entity-relationship diagram describing the Super Baseball League's business environment. We now report that the Super Baseball League has been absorbed into the Sensational Sports Federation (SSF). SSF divides its sports into two categories: team sports and individual sports. There are three team sports: baseball, basketball, and football, and two individual sports: golf and tennis. The central entity in each of these five sports is a ‘‘participant.'' In the team sports a participant is a team; in the individual sports a participant is an individual player. Every SSF participant (team or individual) has a participant number, participant name, sport (e.g. baseball, golf, etc.), and year affiliated with SSF. In addition, every team has a number of players, a home city and state, and a mascot. Every player in the individual sports has a name, home address, home telephone number, and annual income. Furthermore, golfers have a handicap; tennis players have a world ranking.
a. Draw an object-oriented generalization diagram, to represent SSF's business environment.
b. Add the information given about baseball teams and associated entities in Exercise 2 of Chapter 2, to the diagram in part a, constructing a complete object-oriented class diagram.
c. Add several operations to the class diagram in part b, demonstrating polymorphism with some of them.
Exercise 2 of Chapter 2
The following entity-relationship diagram describes the business environment of Video Centers of Europe, Ltd., which is a chain of videotape and DVD rental stores. Write a verbal description of how VCE conducts its business, based on this E-R diagram.
