Classes, Objects, and Use Cases - Round 1

The February 15 discussion identified the following list of classes and objects.

Class	Some Attributes	Needed Objects of Class
PersonsSchedule	week	One object per schedule
	Owner
	Days
Day	Date	One object per day
	appointments
Appointment	StartingTime	One object for each appointment
	EndingTime
	General Annotation
	Private Comment
MonthlyCalendar		One object for each month
StudentClass		[group with capabilities]
OwnerClass		[Individual with capabilities
OutsiderClass		[group with capabilities]
eMail	FromAddress	One object per sent message
	ToAddress
	SubjectLine
	Body
Login	Username	One object per individual
	Password
Announcements	Instructions	One object per PersonsSchedule
	OwnersText
GUIInterface		One object per user
File	FileName	One object per PersonsSchedule

This and previous discussions also identified the following classes derived from Class Appointment:

ApptUnavailable:	appointments cannot be made during this time
ApptPossible:	appointments are possible during this time (although outsiders always will have to sign up via e-mail)

The Class ApptPossible in turn has these derived classes:

• ApptRestricted: appointments possible via e-mail only
• ApptSignUp: students (and owner) can sign up for a time
• ApptDropIn: office hours are available on a drop-in basis only

A First Draft of Use Cases

The February 15 discussion also identified the following use cases.

1. Create an initial schedule
2. View the initial (default) owner's schedule
3. View a schedule after login
4. View another week
5. Save data to file [Retrieve data from file]
6. Log in
7. Owner makes an appointment
8. Student makes an appointment
9. Outsider makes an appointment
10. User tries to make an appointment that is restricted to her or him.
11. User tries to make an appointment that is designated as available to her or him
12. User tries to make an appointment that is designated as a drop-in time for her or him
13. User tries to make an appointment that is designated as unavailable to her or him
14. Print (to a printer)

This document is available on the World Wide Web as

     http://www.cs.grinnell.edu/~walker/courses/223.sp02/project/classes-uses-1.html

created February 17, 2002 last revised February 17, 2002
For more information, please contact Henry M. Walker at walker@cs.grinnell.edu.