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CS 426 /CPE 426 Senior Projects

CS 426 /CPE 426 Senior Projects. Chapter 7: Classes and Objects & Chapter 8: Finding Analysis Classes [Arlow and Neustadt, 2005] February 10, 2009. Outline. Objects UML Notation for Objects Classes UML Notation for Classes UP Activity: Analyze Use Cases Analysis Classes

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CS 426 /CPE 426 Senior Projects

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  1. CS 426 /CPE 426 Senior Projects Chapter 7: Classes and Objects & Chapter 8: Finding Analysis Classes [Arlow and Neustadt, 2005] February 10, 2009

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

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

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

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

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

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

  10. Classes: .Relationship with Objects • The <<instantiate>> 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. Classes: UML Notation…… • Figure 7.7 [Arlow & Neustadt, 2005]

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

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

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

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

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

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

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

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

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

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

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

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