Object-Oriented Analysis and Design Lecture 1 Instructor: John Cole 1Object-Oriented Analysis and Design - Intro

What we will cover Thinking in objects Design patterns The agile methodology Analysis: An investigation of the requirements and the problem domain objects Design: Conceptual solution that fulfills the requirements Object-Oriented Analysis and Design - Intro2

What You Will Do You will write use cases You will create a domain model You will create class diagrams You will write programs Object-Oriented Analysis and Design - Intro3

Most Important Learning Goal Learn to skillfully assign responsibilities to software objects This one thing influences the robustness, maintainability, and reusability of software components Object-Oriented Analysis and Design - Intro4

Define Use Cases A Use Case defines the way a system will be used. What does a specific actor do? What are the results of the action? For example, a use case for a system I wrote recently is that the people in the mailroom get in about 500 checks every day. They must log these into a system and produce a report on how much money came in. This is one use case of about 30 for that system. Object-Oriented Analysis and Design - Intro5

Define a Domain Model The Clerk creates a Batch of 1 to 30 checks. The Clerk keys in to a Check Record the check number, dollar amount, and sender of each check. The Clerk prints a report showing the Checks in the Batch The Supervisor prints a report of the daily total. Object-Oriented Analysis and Design - Intro6

Assign Object Responsibilities A Batch object contains multiple Check objects. Checks can be added or removed from a Batch. The Batch object can be told to print its information. A Check object can be modified. Information about a Check can be requested. Object-Oriented Analysis and Design - Intro7

UML The Unified Modeling Language is a visual language for specifying, constructing, and documenting the artifacts of systems. Do not use UML diagrams as a substitute for clear explanation. Explanatory text must always accompany UML diagrams. UML is NOT a “silver bullet” that will solve all of your design problems. Object-Oriented Analysis and Design - Intro8

UML Perspectives Conceptual: diagrams describe things in the real world or domain of interest Specification: diagrams describe software abstractions or components with specifications and interfaces, language- independent Implementation: diagrams describe software implementations. Object-Oriented Analysis and Design - Intro9

What is a Class? Object-Oriented Analysis and Design - Intro10