1. Jiazzi: New-Age Components for Old-Fashioned Java Sean McDirmid Matthew Flatt Wilson C. Hsieh School of Computing University of Utah

2. Java Components Not all components are objects Components should share classes

3. External Linking

5. Separate Compilation

11. Jiazzi Components

12. Imports

14. Exports

15. Signatures

17. Linking

19. Re-exports

21. Outline Introduction Advanced Features Demonstration of Expressiveness

22. Cyclic Component Linking

24. Mixin Constructions

26. Outline Introduction Advanced Features Demonstration of Expressiveness

27. Outline Jiazzi: components for Java Demonstration of expressiveness Key features of Jiazzi

28. An Extensibility Problem

36. A Solution

40. Open Class Pattern

51. Outline Jiazzi: components for Java Demonstration of expressiveness Key features of Jiazzi

52. Cyclic Component Linking

53. Mixin Constructions

56. Pragmatics Separates core and component languages Operates on class files Executes on Java Virtual Machines See our poster

57. Some Related Work Program Units –[Flatt et al., POPL ‘98] MultiJava –[Millstein et al., OOPSLA ‘00] Mixin Modules –[Duggan and Techaubol OOPSLA ‘01]

58. Summary Separate compilation External linking Cyclic linking Mixin constructions http://www.cs.utah.edu/plt/jiazzi

59. Inheritance Cycles

60. Methods Collisions

61. Cyclic Component Linking

64. Mixin Constructions