COP 3331 OBJECT-ORIENTED ANALYSIS AND DESIGN

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COP 3331 OBJECT-ORIENTED ANALYSIS AND DESIGN

• Bob Myers
• Department of Computer Science

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COP 3331 Object Oriented Software Engineering

• What is Software Engineering (SE)?
• Involves more than just coding
• Problem Definition
• Problem Analysis
• High level system design (including hardware!)
• Design of classes/objects
• Implementation
• Testing
• Maintenance

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Modeling!

• Modeling is a nice way to abstract and simplify
  some of the activities in software engineering
• There are many modeling notations
• UML - Unified Modeling Language
• A nice way of representing things with diagrams
• Different types of diagrams for use with
  different stages of software engineering
• Works well with OOP.

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UML First Pass Use Case Diagrams
Package
SimpleWatch
Actor
ReadTime
SetTime
WatchUser
WatchRepairPerson
Use case
ChangeBattery
Use case diagrams represent the functionality of
the system from users point of view
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UML First Pass Class Diagrams
Class
Multiplicity
Association
SimpleWatch
1
1
1
1
1
1
2
2
Battery load()
Time now()
PushButton state push()release()
LCDDisplay
blinkIdx blinkSeconds() blinkMinutes() blinkHours(
) stopBlinking() referesh()
Attributes
Operations
Class diagrams represent the structure of the
system
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UML First Pass Sequence Diagram
Object
WatchUser
pressButton1()
blinkHours()
pressButton1()
blinkMinutes()
pressButton2()
incrementMinutes()
refresh()
pressButtons1And2()
commitNewTime()
stopBlinking()
Message
Activation
Sequence diagrams represent the behavior as
interactions
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UML First Pass Statechart Diagrams
State
Initial state
Event
button2Pressed
button12Pressed
Blink
Hours
Transition
button1Pressed
button2Pressed
button12Pressed
Blink
Minutes
button1Pressed
button12Pressed
button2Pressed
Blink
Stop
Seconds
Blinking
Final state
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Other SE issues

• Requirements Elicitation and Analysis
• Communication
• Management Issues
• Testing and Quality Assurance
• Design Patterns
• This is the stuff you will have to deal with in
  the real world, if you work for a company doing
  software development.