1. CS 4233: Object Oriented Analysis and Design 9-Jan-2003 Lecture 1

2. January 9 2003Lecture 12 Outline Previous Business none Course Introduction Mini-design Example

3. January 9 2003Lecture 13 Course Introduction CS 4233: Object-oriented Analysis & Design Prof. Heineman (heineman@cs), FL 137heineman@cs Office hours Tuesday 10:00 – 11:00 AM Thursday 5:00 – 6:00 PM my.wpi.edu web site available

4. January 9 2003Lecture 14 Course Structure Core of five design assignments (50%) Midterm exam, Friday January 31 st (20%) Final exam, Thursday February 27 th (20%) Class participation (10%) as evidenced by questions/answers in class, visits to office hours, communication on my.wpi.edu

5. January 9 2003Lecture 15 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

6. January 9 2003Lecture 16 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

7. January 9 2003Lecture 17 Basic Terms (from TAOO) Object – an abstraction of a physical entity or conceptual thing Class – the abstract descriptor of a set of object instances How are classes defined? Through analysis. Class Data Operations

8. January 9 2003Lecture 18 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

9. January 9 2003Lecture 19 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.

10. January 9 2003Lecture 110 Requirements Analysis > 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.

11. January 9 2003Lecture 111 Analysis Model V0 Book title : String author: String isFantasy : Boolean isLiterature: Boolean nextFantasy : Book nextLiterature : Book … Critique RoadMap 1.Summarize the design 2.Identify the design decisions 3.Explain correct decisions 4.Critique flawed decisions Book 1 1 nextFantasy nextLiterature

12. January 9 2003Lecture 112 Analysis Model V1 Collection fantasyBooks : Book literatureBooks : Book nonFictionBooks : Book … Collection 1 Book title : String author: String next: Book … Book *

13. January 9 2003Lecture 113 Analysis Model V2 Collection categories : Category[*] … addCategory (Category c) Category getCategory(s) Collection 1 Book title : String author: String next: Book … Category * Book 1* Category type : String books : Book … addBook (b)

14. January 9 2003Lecture 114 Why doesn’t 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)]

15. January 9 2003Lecture 115 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 < len ; firstUpper++) { char c = value[off+firstUpper]; if (c != Character.toLowerCase(c)) {break scan;} } return this; } char[] result = new char[count]; /* Just copy the first few lowerCase characters. */ System.arraycopy(val, off, result, 0, firstUpper); if (locale.getLanguage().equals("tr")) { // special loop for Turkey for (int i = firstUpper; i < len; ++i) { char ch = val[off+i]; if (ch == 'I') { result[i] = '\u0131'; // dotless small i continue; } if (ch == '\u0130') { // dotted I result[i] = 'i'; // dotted i continue; } result[i] = Character.toLowerCase(ch); } } else { // normal, fast loop for (int i = firstUpper; i < len; ++i) { result[i] = Character.toLowerCase(val[off+i]); } return new String(0, result.length, result); }

16. January 9 2003Lecture 116 Friday Assignments Read TAOO: Chapter 1 Complete Constructor Challenge Quiz Do exercise 1-2

17. January 9 2003Lecture 117 References JDK online documentation.documentation Currency IMF special Basket,IMF special Basket