CS 426 /CPE 426 Senior Projects

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CS 426 /CPE 426 Senior Projects

• Chapter 7 Classes and Objects
• Chapter 8 Finding Analysis Classes
• Arlow and Neustadt, 2005
• February 10, 2009

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Outline

• Objects
• UML Notation for Objects
• Classes
• UML Notation for Classes
• UP Activity Analyze Use Cases
• Analysis Classes
• Finding Analysis Classes

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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

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Objects Encapsulation

• Fig. 7.2 Arlow Neustadt, 2005

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Objects Messaging

• Figure 7.3 Arlow Neustadt, 2005

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Objects UML Notation

• Figure 7.4 Arlow Neustadt, 2005

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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

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Classes Classification of Objects

• Figure 7.5 Arlow Neustadt, 2005
• Classifying objects ? determining classes

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Classes Relationship with Objects.

• Figure 7.6 Arlow Neustadt, 2005
• ltltinstantiategtgt relationship

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Classes .Relationship with Objects

• The ltltinstantiategtgt 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).

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Classes UML Notation

• Figure 7.7 Arlow Neustadt, 2005

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Classes .UML Notation..

• Figure 7.8 Arlow Neustadt, 2005
• The attribute compartment

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Classes ..UML Notation.

• Table 7.3 Arlow Neustadt, 2005. Visibility
  types

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Classes UML NotationTable 7.4 Arlow
Neustadt, 2005 Visibility semantics in UML,
Java and C

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Classes .UML Notation..

• Figure 7.10 Arlow Neustadt, 2005 Operations

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Classes ..UML Notation.

• Figure 7.14 Arlow Neustadt, 2005
• Class stereotypes

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Classes UML Notation

• Figure 7.16 Arlow Neustadt, 2005
• Constructors
• Figure 7.15 Arlow Neustadt, 2005
• Class Scope

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Classes Analysis Classes

• Figure 8.2 Arlow Neustadt, 2005

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Classes .Analysis Classes..

• Figure 8.3 Arlow and Neustadt, 2005
• Example of Analysis Class

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Classes ..Analysis Classes.

• Figure 8.4 Jim Arlow and Ila Neustadt, 2005
• Brainstorming, part of CRC analysis technique

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Classes Analysis Classes

• Finding analysis classes by using RUP
  stereotypes

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Boundary Classes

• Used to model interactions between system and its
  actors and collect requirements on systems
  boundaries
• Often represent windows, screens, APIs
• Kendall V. Scott

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Control Classes

• Used to encapsulate control related to a specific
  use case
• Represent coordination, sequencing, transactions,
  and control of other objects
• Kendall V. Scott

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Entity Classes

• Used to model long-lived/persistent information
• Kendall V. Scott