Object-Oriented Analysis and
Object-Oriented Analysis and
Design
Design
with Patterns, Process, and the UML
with Patterns, Process, and the UML
Introduction
Introduction
Introduction
Introduction

Welcome!

Introduction
–
Course leader: Dr. Trần Vũ Bình
–
Participants:

Hồ Thuỵ Hương Thuỷ (Tutor)

Prerequisites: Object-Oriented
Programming

Logistics
Overview and Objectives
Overview and Objectives

Learn how to “think in objects”

Requirements and analysis of the problem


You can do it by yourself

Form your team as early as possible
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Team Project – Online Enrolment
Team Project – Online Enrolment

Your client:
–
Hoa Sen University

Your goal:
–
Design a system to allow users to select
appropriate course, arrange schedule as
available

Manage studied/failed courses according to
curriculum.

Manage tuition set per course

Display marks, GPA and report

Taking the system online for student enrolment
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Project Task
Project Task


Lecture 1
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Today’s lecture topic
Today’s lecture topic

Object oriented concepts revisited

What’s OOAD?

Functional decomposition and its problem

What’s UML?

Software Development Process
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What is Object-Oriented?
What is Object-Oriented?

What is object?

What is class?

What is instance?

What is abstraction?

What is inheritance?

What is polymorphism?


Object vs. Function Oriented Analysis
Object vs. Function Oriented Analysis
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Library
Information
System
Structured A&D
Decompose by functions and processes
OOA&D
Decompose by objects and concepts
Catalogue Librarian
Book Library
Functional Decomposition
Functional Decomposition

A very simple development case
–
You are asked to write code to access a list of
shapes that were stored in a database then
display them

What steps we need to achieve this?
1.Locate the list of shapes in the database
2.Open up the list of shapes
3.Sort the list according to some order
4.Display the individual shapes on the monitor
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Functional Decomposition
Functional Decomposition


–
Get list of people in the class
–
For each person on this list,
do the following:

Find the next class he or she
is taking

Find the location of that class

Find the way to get from your
classroom to the persona’s
next class

Tell the person how to get to
his or her next class

Procedures needed:
–
A way of getting the list of
people in the class
–
A way of getting the schedule
for each person in the class
–
A program that gives
someone directions from
your classroom to any other
classroom

expect each person will figure out how to do
the task individually
–
Two kinds of objects

Instructor: responsible for posting the instruction

Students: knowing their own next classes, able to follow
the instruction

Key point: Shift of responsibility!
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Dealing with changing
Dealing with changing
requirements
requirements

Impact
–
What if you need to distinguish postgraduate
students from undergraduate students?
–
Option 1: change the control program a lot
–
Option 2: add an additional routine for
graduate students to follow

The second case can minimize changes
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Dealing with changing

a domain model that shows the noteworthy
domain concepts or objects, attributes, and
associations
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Player
name
DiceGame
Die
faceValue
Rolls
Plays
Includes
2
2
1
1
1
1
Key steps in OOAD [3]
Key steps in OOAD [3]

Interaction Diagram: shows the flow of
messages between software objects (method
invocation)
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:DiceGame
play()
die1 : Die
fv1 := getFaceValue()
die2 : Die