Design Patterns IEncapsulation, Observer, and Decorator
CS 370 SE Practicum, Cengiz Günay
(Some slides courtesy of Eugene Agichtein and the Internets)
CS 370, Günay (Emory) Design Patterns I Spring 2014 1 / 9
Agenda
Upcoming project milestones:
Today: setup a meeting with Bob to get help about your progress4/3 get ready to deploy!4/10 in-class demo and functional prototype opens for testing
Today:
Some design patterns you can use. . .
CS 370, Günay (Emory) Design Patterns I Spring 2014 2 / 9
Agenda
Upcoming project milestones:
Today: setup a meeting with Bob to get help about your progress4/3 get ready to deploy!4/10 in-class demo and functional prototype opens for testing
Today:
Some design patterns you can use. . .
CS 370, Günay (Emory) Design Patterns I Spring 2014 2 / 9
Patterns in Software Engineering
Don’t reinvent the wheel!Re-use existing patterns!
CS 370, Günay (Emory) Design Patterns I Spring 2014 3 / 9
Patterns in Software Engineering
Don’t reinvent the wheel!Re-use existing patterns!
CS 370, Günay (Emory) Design Patterns I Spring 2014 3 / 9
Entry/Exit Surveys
Exit survey: Version controlWhat’s the difference between centralized and distributed VCs? Whichone is better and why?Does version control help you recover from a situation where youdeleted some files by mistake? If so, explain how.
Entry survey: Design PatternsHow do you design software? What are some components that needdesigning in your project?What kind of patterns can be reused during the design of yourproject? If possible, give some examples.
CS 370, Günay (Emory) Design Patterns I Spring 2014 4 / 9
UML Cont'd: Use Cases & Stories
• Sequence diagrams:• http://www.uml-diagrams.org/sequence-diagrams-examples.html
• Use case diagrams:http://www.agilemodeling.com/artifacts/useCaseDiagram.htm
• Use case tips: http://www.andrew.cmu.edu/course/90-754/umlucdfaq.html
Click on me!
Example: SimUDuck
Recap: Strategy Pattern
Your class hierarchies?
Need some volunteersTell us about your project classes:
1 Uses inheritance for what?2 Would encapsulation be useful?
CS 370, Günay (Emory) Design Patterns I Spring 2014 6 / 9
Your class hierarchies?
Need some volunteersTell us about your project classes:
1 Uses inheritance for what?
2 Would encapsulation be useful?
CS 370, Günay (Emory) Design Patterns I Spring 2014 6 / 9
Your class hierarchies?
Need some volunteersTell us about your project classes:
1 Uses inheritance for what?2 Would encapsulation be useful?
CS 370, Günay (Emory) Design Patterns I Spring 2014 6 / 9
Observer Pattern
Observer Pattern
Observer Pattern
Observer Pattern Defined
Java Observable
Observer pattern in your project?
Can you think of a place that will be useful in your project?
I User notificationI LikesI Button press in games
CS 370, Günay (Emory) Design Patterns I Spring 2014 8 / 9
Observer pattern in your project?
Can you think of a place that will be useful in your project?I User notificationI LikesI Button press in games
CS 370, Günay (Emory) Design Patterns I Spring 2014 8 / 9
Decorator Pattern
Next week
Scrum now!Next week: Javascript
CS 370, Günay (Emory) Design Patterns I Spring 2014 9 / 9
