CSC307 Lecture 12

Introduction to Software Engineering
Design Patterns III
(202307)

Transcript

1. jgs CSC 307 Introduction to Software Engineering Lecture 12: Design Patterns III Dr. Javier Gonzalez-Sanchez javiergs@calpoly.edu www.javiergs.com Building 14 -227 Office Hours: By appointment
2. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 3 GoF Patterns
3. jgs Decorator & Composite Design Patterns
4. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 5 Decorator
5. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 6 Decorator
6. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 7 Decorator
7. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 8 abstract class Component { public abstract void operation(); } Component
8. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 9 class ConcreteComponent extends Component { @override public void operation() { System.out.print("ConcreteComponent-Operation()"); } } ConcreteComponent
9. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 10 abstract class Decorator extends Component { protected Component component; public void setComponent(Component component) { this.component = component; } @override public void operation() { if (component != null) { component.operation(); } } } Decorator
10. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 11 class ConcreteDecoratorA extends Decorator { @override public void operation() { super.operation(); System.out.println("ConcreteDecoratorA-Operation()”); } } ConcreteDecoratorA
11. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 12 class ConcreteDecoratorB extends Decorator { @override public void operation() { super.operation(); addedBehavior(); System.out.println("ConcreteDecoratorB-Operation()"); } void addedBehavior() { } } ConcreteDecoratorB
12. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 13 class MainApp { static void main() { // Create ConcreteComponent and two Decorators ConcreteComponent c = new ConcreteComponent(); ConcreteDecoratorA d1 = new ConcreteDecoratorA(); ConcreteDecoratorB d2 = new ConcreteDecoratorB(); // Link decorators d1.SetComponent(c); d2.SetComponent(d1); d2.Operation(); } } Main
13. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 14 class MainApp { static void main() { // Create ConcreteComponent and two Decorators ConcreteComponent c = new ConcreteComponent(); ConcreteDecoratorA d1 = new ConcreteDecoratorA(); ConcreteDecoratorB d2 = new ConcreteDecoratorB(); // Link decorators d1.SetComponent(c); d2.SetComponent(d1); d2.Operation(); } } Main ConcreteComponent - Operation() ConcreteDecoratorA - Operation() ConcreteDecoratorB - Operation()
14. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 15 § Both allow you to change how an object behaves § The decorator pattern can be used to make it possible to extend (decorate) the functionality of a certain object at runtime. § Inheritance adds behavior at compilation-time. Decorator vs Inheritance
15. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 16 Scenario CompanionHelper CompanionTroll Companion
16. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 17 Scenario CompanionHelper CompanionTroll Companion CompanionTrollHelper
17. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 18 Scenario CompanionHelper CompanionTroll Companion CompanionTrollHelper
18. jgs Test Yourselves Connecting all
19. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 35 Assignment 03
20. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 36 Assignment 03
21. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 37 Assignment 03 - UI Main JFrame ActionListener PlotPanel JButton Run
22. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 38 Assignment 03 – Observer Pattern Main Observable PlotPanel Run Source Observer
23. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 39 Assignment 03 – Decorator Pattern Main PlotPanel Observer Worker WorkerStandard Tool ToolLine ToolSquare
24. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 40 Assignment 03 – Decorator Pattern ToolBar ToolSquare WorkerStandard ToolSquare WorkerStandar WorkerStandar
25. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 41 Assignment 03 – Singleton Pattern PlotPanel Run << Singleton >> Configurator
26. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 42 Source
27. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 43 World (1/2)
28. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 44 World (2/2)
29. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 45 PlotPanel
30. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 46 WorkerStandard
31. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 47 WorkerTool
32. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 48 WorkerToolLine
33. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 49 ToolSquare
34. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 50 Questions
35. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 51 Office Hours Tuesday and Thursday 3 - 5 pm But an appointment required Sent me an email – javiergs@calpoly.edu
36. jgs
37. jgs CSC 307 Introduction to Software Engineering Lab 12: Complete Assignment 02 Dr. Javier Gonzalez-Sanchez javiergs@calpoly.edu www.javiergs.com Building 14 -227 Office Hours: By appointment
38. jgs Part A Requirements
39. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 55 Let’s Work Let’s review Assignment 01
40. jgs Part B Design Patterns
41. jgs Javier Gonzalez-Sanchez | CSC 308 | Winter 2023 | 57 Project – User selects Cluster and clicks Run ✅ ✅
42. jgs CSC 307 Introduction to Software Engineering Javier Gonzalez-Sanchez, Ph.D. javiergs@calpoly.edu Summer 2023 Copyright. These slides can only be used as study material for the class CSC308 at Cal Poly. They cannot be distributed or used for another purpose.