Summary - Practices

I began this chapter with a quick overview of some of the main concepts underpinning Object-Oriented development and seeing how these apply to the process of Analysis and Design. Next, I discussed how modeling can help you not only design a better system, but also develop a better understanding of that system and how it should work.

In the second half of this chapter, we dipped our toes in the waters of UML— taking a quick look at some of the different types of diagram—but it’ll be time to jump right in during the next chapter.

Exercise Solutions

Solutions to Exercise 101

1. The system creates a kennel assignment, a mapping of a pet to a specific pen.

2. The system closes the kennel assignment.

3. Checking a pet in or checking a pet out.

4. Logging a medical problem.

Solutions to Exercise 102

1. Enter the pet’s name. Find available kennel space. Assign the kennel to the pet.

2. Enter the pet’s personal data. Create a new record for the pet.

Solutions to Exercise 103

    2.  Reservation Center through the IReservations interface. 
        Accounting Center through the IAccounting interface.

    3.  Intercom, telephone, email, and postal.

Solutions to Exercise 104

   1.  Care Giver Center, Vet Record Page, ICareGiving interface,  
        and ICommunications interface.

   2.  Care Giver and Veterinarian.

    3.  ICareGiving.

   4.  Via a telephone contact.

Solutions to Exercise 105

1. Pet Record, Reservation Record, and Kennel Space.

2. Create and Close.

3. Name, Species, Breed, Owner, and Schedule.

4. Kennel Number, Building, Size, and Status.

Solutions to Exercise 106

1. Specifications Completed.

2. Construction Completed (from Defined), Pet Checked Out (from In Use), and Pet Relocated (also from In Use).

3. Deconstructed.

   4. Via a Pet Checked Out event or a Pet Relocated event,
       followed by a Dismantled event. This prevents the system from
       having a pet with no defined pen. (Can’t have the dogs running
       loose!)

Solutions to Exercise 107

1. Accounting center and reception center.

2. Via the modem.

3. Via the Internet.

4. According to this diagram, the only path possible is through the KMS server. Although the diagram doesn’t explicitly state this, the likely approach is that the care giver station updates information in the central database, and the reception center reads this updated data.

Solutions to Exercise 108

1. Care Giver Classes, Accounting Classes, Reservation Classes, and KMS Central Classes.

2. KMS Interfaces and KMS Database Classes.

    1. Grady Booch, Object-Oriented Analysis and Design with
       Applications, Second Edition (Addison-Wesley, 1994). This is the
       classic work on OOAD, and a must-read.

   3. See http://www.cuttysark.org.uk/ for pictures and the history
       of this vessel.   

   4. Steve McConnell, Software Project Survival Guide (Microsoft
       Press, 1997), p. 29

   7. Martin Fowler and Kendall Scott, UML Distilled, Second Edition
      (Addison-Wesley, 1999), pp. 13–38

   8. Murray R. Cantor, Object-Oriented Project Management with UML
      (John Wiley & Sons, 1998), pp. 98–103

   9. Putnam P. Texel and Charles B. Williams, Use Cases Combined
      with Booch/OMT/UML: Process and Products (Prentice Hall,
      1997), pp. 3–9ff.

 10. Ivar Jacoboson, Grady Booch, and James Rumbaugh, The Unified
      Software Development Process (Addison-Wesley, 1999)