CS 4233: Object Oriented Analysis and Design

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CS 4233 Object Oriented Analysis and Design

• 9-Jan-2003
• Lecture 1

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Outline

• Previous Business
• none
• Course Introduction
• Mini-design Example

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Course Introduction

• CS 4233 Object-oriented Analysis Design
• Prof. Heineman (heineman_at_cs), FL 137
• Office hours
• Tuesday 1000 1100 AM
• Thursday 500 600 PM
• my.wpi.edu web site available

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Course Structure

• Core of five design assignments (50)
• Midterm exam, Friday January 31st (20)
• Final exam, Thursday February 27th (20)
• Class participation (10)
• as evidenced by questions/answers in class,
  visits to office hours, communication on
  my.wpi.edu

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Course Goals

• Understand, develop, and critique UML models
• Utilize use cases to identify and describe
  requirements and specifications of a software
  system
• Generate a detailed design document for a
  software system
• Understand the use of design patterns within
  complex designs
• Describe and illustrate the use of design patterns

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Course Focus

• Lay a foundation for OO design
• too much OO programming is done without first
  focusing on the design
• Educate in best practices of OO design
• hands-on experience
• Challenge you
• Seven weeks of thinking design

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Basic Terms (from TAOO)

• Object an abstraction of a physical entity or
  conceptual thing
• Class the abstract descriptorof a set of
  object instances
• How are classes defined? Through analysis.

ClassData Operations
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OO Requirements Analysis (RA)

• Identify objects that are necessary for the
  context of a desired software application
• Typically precedes OO Design (OOD)
• OORA specifies externally visible characteristics
  of a system
• OOD specifies internal structure of system

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Design Example

• Client makes the following request
• I want to keep a linked list of the books in my
  collection. There are several categories of
  books, including Science Fiction, Fantasy,
  Fiction, NonFiction, Literature, and Reference. I
  frequently buy and sell books, and need monthly
  reports of my collection broken down by category.

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Requirements Analysis

• ltltidentify nounsgtgt
• I want to keep a linked list of the books in my
  collection. There are several categories of
  books, including Science Fiction, Fantasy,
  Fiction, NonFiction, Literature, and Reference. I
  frequently buy and sell books, and need monthly
  reports of my collection broken down by category.

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Analysis Model V0

• Critique RoadMap
• Summarize the design
• Identify the design decisions
• Explain correct decisions
• Critique flawed decisions

1
nextFantasy
Book
nextLiterature
1
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Analysis Model V1
Collection
Book
1

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Analysis Model V2
Collection
Category
Book
1

1

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Why doesnt the JDK have

• Some Basic classes?
• Person
• User
• Book
• Why do its classes seem too much
• Currency (JDK 1.4 only)
• Collection not a class but an interface
• String 11 constructors (2 deprecated), 55
  methods (1 deprecated)

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• public String toLowerCase(Locale locale)
• int len count
• int off offset
• char val value
• int firstUpper
• / Now check if there are any characters
  that need to be changed. /
• scan
• for (firstUpper 0 firstUpper lt
  len firstUpper)
• char c valueofffirstUpper
• if (c ! Character.toLowerCase(c))
  break scan
• return this
• char result new charcount
• / Just copy the first few lowerCase
  characters. /
• System.arraycopy(val, off, result, 0,
  firstUpper)

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Friday Assignments

• Read TAOO Chapter 1
• Complete Constructor Challenge Quiz
• Do exercise 1-2

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References

• JDK online documentation.
• Currency
• IMF special Basket,