1. 1 CS 426 /CPE 426 Senior Projects Chapter 7: Classes and Objects & Chapter 8: Finding Analysis Classes [Arlow and Neustadt, 2005] February 19, 2008

2. 2 Outline Objects UML Notation for Objects Classes UML Notation for Classes UP Activity: Analyze Use Cases Analysis Classes Finding Analysis Classes

3. 3 Objects Object = “A discrete entity with well-defined boundary that encapsulates state and behavior, an instance of a class” [J. Rumbaugh] Properties of objects: Identity State Behavior

4. 4 Objects: Encapsulation Fig. 7.2 [Arlow & Neustadt, 2005]

5. 5 Objects: Messaging Figure 7.3 [Arlow & Neustadt, 2005]

6. 6 Objects: UML Notation Figure 7.4 [Arlow & Neustadt, 2005]

7. 7 Classes Class = “The descriptor for a set of objects that share the same attributes, operations, methods, relationships, and behavior” [J. Rumbaugh] Every object is an instance of exactly one class Choosing the right classification scheme is a key factor in object-oriented analysis and design

8. 8 Classes: Classification of Objects Figure 7.5 [Arlow & Neustadt, 2005] Classifying objects  determining classes

9. 9 Classes: Relationship with Objects. Figure 7.6 [Arlow & Neustadt, 2005] > relationship

10. 10 Classes:.Relationship with Objects The > relationship is a stereotype of the dependency relationship Dependency: “A relationship between two elements in which a change to one element (the supplier) may affect or supply information needed by the other element (the client)”.

11. 11 Classes: UML Notation…… Figure 7.7 [Arlow & Neustadt, 2005]

12. 12 Classes:.UML Notation….. Figure 7.8 [Arlow & Neustadt, 2005] The attribute compartment

13. 13 Classes:..UML Notation…. Table 7.3 [Arlow & Neustadt, 2005]. Visibility types

14. 14 Classes: …UML Notation… Table 7.4 [Arlow & Neustadt, 2005]: Visibility semantics in UML, Java and C#

15. 15 Classes: ….UML Notation.. Figure 7.10 [Arlow & Neustadt, 2005] Operations

16. 16 Classes: …..UML Notation. Figure 7.14 [Arlow & Neustadt, 2005] Class stereotypes

17. 17 Classes: ……UML Notation Figure 7.16 [Arlow & Neustadt, 2005] Constructors Figure 7.15 [Arlow & Neustadt, 2005] Class Scope

18. 18 Classes: Analysis Classes… Figure 8.2 [Arlow & Neustadt, 2005]

19. 19 Classes:.Analysis Classes.. Figure 8.3 [Arlow and Neustadt, 2005] Example of Analysis Class

20. 20 Classes:..Analysis Classes. Figure 8.4 [Jim Arlow and Ila Neustadt, 2005] Brainstorming, part of CRC analysis technique

21. 21 Classes: …Analysis Classes Finding analysis classes by using RUP stereotypes:

22. 22 Boundary Classes Used to model interactions between system and its actors and collect requirements on system’s boundaries Often represent windows, screens, APIs [Kendall V. Scott]

23. 23 Control Classes Used to encapsulate control related to a specific use case Represent coordination, sequencing, transactions, and control of other objects [Kendall V. Scott]

24. 24 Entity Classes Used to model long-lived/persistent information [Kendall V. Scott]