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Object-oriented
and
Analysis emphasizes an
investigation of the problem and
requirements, rather than a solution.
Design emphasizes a conceptual
solution that fulfils the requirements,
rather than its implementation.
Do the right thing
Do the thing right
What is OOAD?
Object-oriented analysis emphasises on finding and
describing the objects—or concepts—in the problem
domain.
Object-oriented design emphasises on defining
software objects and how they collaborate to fulfil the
requirements.
Example: Library management
system
Domain
Concepts
Book
title
Visualizatio
n of
Domain
Concepts
Public class Book{
private String title;
public Chapter getChapter (int){…}
}
Representation in an object
oriented programming
language
Course Layout
OOAD
C++
UML
DP
SE
Introduction to OOAD (CS212)
• Repeatable
solution to a
commonly
occurring
problem
• Design and
development
of software
• Modeling
Language to
visualize design
of a system
• Object
Oriented
Programming
C+
+
UM
L
DPSE
Course structure
OOAD
Theory
OO Concepts
Design
Patterns
OO Modeling
Laboratory C++
Marks distribution
Theory
• Class participation: 5
• Mid semester 1: 15
• Mid semester 2: 20
• End semester: 60
Lab
•Each lab: 15
•Mid semester Practical: 20
•End semester Practical: 30
Lecture Plan
Mid sem
1
Class and
Object
Overloading Inheritance
Mid sem
2
Virtual
Function and
Polymorphism
Exception
handling
Template
End sem STL UML
Design
Patterns
About Lab sessions
• C++ programming assignments
• Thursday – 1 PM to 3 PM - B14CS001 to B14SS017
• Friday – 1 PM to 3 PM - UG201213002 to UG201313039
• Venue: Computer centre
• 10 programming assignments, 1 mid-semester practical, 1
end-semester practical
Evaluation criteria for the lab
•Format - 2
•Documentation - 2
•Response - 4
•Design - 3
•Execution - 4
Procedural vs. Object-Oriented
Line of code
Line of code
Line of code
Data is stored
independent
of application
Each object is independent of
the others
OO-applicationProcedural
application
DATA
Main OO Concepts
Encapsulation Abstraction
Inheritance Polimorphism
OO
Concepts
Encapsulation
• Each objects methods manage it’s own attributes.
• This is also known as information hiding.
• An object A can learn about the values of attributes of
another object B, only by invoking the corresponding
method associated to the object B.
• Example:
• Class: Student
• Attributes: Name, roll number
• Methods: getName(), setRollNumber()
Abstraction
• A problem solving tool that allows one to think of a problem at a
higher level without worrying about the details.
• Provides only essential information to the outside world and
hides their background details,
• To represent the needed information in program without
presenting the details.
• For example, a clock shows the time to the user, without telling
how it is internally stored.
Abstraction vs. Encapsulation
Every entity that performs abstraction is
encapsulated internally but every thing that
shows encapsulation need not be abstraction
always.
Classes
• Classes are templates that have methods and attribute
names and type information packaged in a single unit
• Objects are generated by these classes and they actually
contain values.
• We design an application at the class level.
• During execution objects are created by classes as they
are needed to contain state information.
• Objects are removed when not needed.
Class & Objects
Name
Number
CLASS: Furniture
methods: Example
ChangeNumber
Objects:
Desk
123445
ChairA
32143
ChairB
45687
Class Hierarchies & Inheritance
• Classes can be arranged in hierarchies so that more classes
inherit attributes and methods from more abstract clases
• Class hierarchy diagrams
Class: Chair
subclasses
Chair Type A Chair Type B
Polimorphism
• One method will behave differently when it is applied to the
objects of different classes
• Different methods associated with different classes can
interpret the same message in different ways.
• Example: an object can send a message PRINT to several
objects, and each one will use it’s own PRINT method to
execute the message.
• E.g. Overloading
Unified Process
• Inception— approximate vision, business case, scope, vague
estimates.
• Elaboration— refined vision, iterative implementation of the
core architecture, resolution of high risks, identification of most
requirements and scope, more realistic estimates.
• Construction— iterative implementation of the remaining
lower risk and easier elements, and preparation for deployment.
• Transition— beta tests, deployment.
Schedule-oriented terms in the
Unified Process
Inception Elaboration Construction Transition
Iteration Phase
Milestone Release
Final
Product

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Object oriented analysis

  • 1. Object-oriented and Analysis emphasizes an investigation of the problem and requirements, rather than a solution. Design emphasizes a conceptual solution that fulfils the requirements, rather than its implementation. Do the right thing Do the thing right
  • 2. What is OOAD? Object-oriented analysis emphasises on finding and describing the objects—or concepts—in the problem domain. Object-oriented design emphasises on defining software objects and how they collaborate to fulfil the requirements.
  • 3. Example: Library management system Domain Concepts Book title Visualizatio n of Domain Concepts Public class Book{ private String title; public Chapter getChapter (int){…} } Representation in an object oriented programming language
  • 5. Introduction to OOAD (CS212) • Repeatable solution to a commonly occurring problem • Design and development of software • Modeling Language to visualize design of a system • Object Oriented Programming C+ + UM L DPSE
  • 7. Marks distribution Theory • Class participation: 5 • Mid semester 1: 15 • Mid semester 2: 20 • End semester: 60 Lab •Each lab: 15 •Mid semester Practical: 20 •End semester Practical: 30
  • 8. Lecture Plan Mid sem 1 Class and Object Overloading Inheritance Mid sem 2 Virtual Function and Polymorphism Exception handling Template End sem STL UML Design Patterns
  • 9. About Lab sessions • C++ programming assignments • Thursday – 1 PM to 3 PM - B14CS001 to B14SS017 • Friday – 1 PM to 3 PM - UG201213002 to UG201313039 • Venue: Computer centre • 10 programming assignments, 1 mid-semester practical, 1 end-semester practical
  • 10. Evaluation criteria for the lab •Format - 2 •Documentation - 2 •Response - 4 •Design - 3 •Execution - 4
  • 11. Procedural vs. Object-Oriented Line of code Line of code Line of code Data is stored independent of application Each object is independent of the others OO-applicationProcedural application DATA
  • 12. Main OO Concepts Encapsulation Abstraction Inheritance Polimorphism OO Concepts
  • 13. Encapsulation • Each objects methods manage it’s own attributes. • This is also known as information hiding. • An object A can learn about the values of attributes of another object B, only by invoking the corresponding method associated to the object B. • Example: • Class: Student • Attributes: Name, roll number • Methods: getName(), setRollNumber()
  • 14. Abstraction • A problem solving tool that allows one to think of a problem at a higher level without worrying about the details. • Provides only essential information to the outside world and hides their background details, • To represent the needed information in program without presenting the details. • For example, a clock shows the time to the user, without telling how it is internally stored.
  • 15. Abstraction vs. Encapsulation Every entity that performs abstraction is encapsulated internally but every thing that shows encapsulation need not be abstraction always.
  • 16. Classes • Classes are templates that have methods and attribute names and type information packaged in a single unit • Objects are generated by these classes and they actually contain values. • We design an application at the class level. • During execution objects are created by classes as they are needed to contain state information. • Objects are removed when not needed.
  • 17. Class & Objects Name Number CLASS: Furniture methods: Example ChangeNumber Objects: Desk 123445 ChairA 32143 ChairB 45687
  • 18. Class Hierarchies & Inheritance • Classes can be arranged in hierarchies so that more classes inherit attributes and methods from more abstract clases • Class hierarchy diagrams Class: Chair subclasses Chair Type A Chair Type B
  • 19. Polimorphism • One method will behave differently when it is applied to the objects of different classes • Different methods associated with different classes can interpret the same message in different ways. • Example: an object can send a message PRINT to several objects, and each one will use it’s own PRINT method to execute the message. • E.g. Overloading
  • 20. Unified Process • Inception— approximate vision, business case, scope, vague estimates. • Elaboration— refined vision, iterative implementation of the core architecture, resolution of high risks, identification of most requirements and scope, more realistic estimates. • Construction— iterative implementation of the remaining lower risk and easier elements, and preparation for deployment. • Transition— beta tests, deployment.
  • 21. Schedule-oriented terms in the Unified Process Inception Elaboration Construction Transition Iteration Phase Milestone Release Final Product