Principles of Object-Oriented Software Development

1. Principles of Object-Oriented Software Development Introduction

2. Introduction

3. Themes and Variations

4. Themes and Variations abstraction -- the object metaphor modeling -- understanding structure and behavior software architecture -- mastering complexity frameworks -- patterns for problem solving components -- scalable software

5. Object Terminology objects -- packet containing data and procedures methods -- deliver service message -- request to execute a method class -- template for creating objects instance -- an object that belongs to a class encapsulation -- information hiding by objects inheritance -- allowing the reuse of class spec.s class hierarchy -- tree structure inheritance relations polymorphism -- to hide different implementations

6. Features of OOP information hiding: state, autonomous behavior data abstraction: emphasis on what rather than how dynamic binding: binding at runtime, polymorphism , virtual functions inheritance: incremental changes (specialization), reusability

7. Benefits of OOP OO = encapsulation + inheritance modularity -- autonomous entities, cooperation through exchanges of messages deferred commitment -- the internal workings of an object can be redefined without changing other parts of the system reusability -- refining classes through inheritance naturalness -- object-oriented analysis/design, modeling

8. Object Computation

10. Design by Contract

16. Paradigms of programming

19. Procedural programming

20. Data abstraction

21. Object-oriented programming

22. The object-oriented software life-cycle

23. The software life-cycle Analysis -- Conceptual Model, System Requirements Design -- System Design, Detailed Design Implementation -- Coding, Testing

24. Requirements -- user needs are constantly evolving Reliability -- incremental development, reuse, synthesis Adaptability -- evolutionary prototyping Maintainability -- incremental development, synthesis Performance -- incremental development, reuse

25. Software Development Models rapid throwaway prototyping -- quick and dirty incremental development -- slowly evolving evolutionary prototyping -- evolving requirements reusable software -- reduces cost and time automated software synthesis -- one level of abstraction higher

26. Analysis

27. Analysis Methods Functional Decomposition = Functions + Interfaces Data Flow Approach = Data Flow + Bubbles Information Modeling = Entities + Attributes + Relationships Object-Oriented = Objects + Inheritance + Message passing

28. Design

29. Design assignments

30. IDA

31. MASS

33. Implementation

34. Errors, bugs TeX [A] -- algorithm awry [B] -- blunder [C] -- structure debacle [F] -- forgotten function [L] -- language liability [M] -- mismatch between modules [R] -- reinforcement of robustness [S] -- surprises [T] -- a trivial typo

36. Beyond Object-Orientation?

38. Challenges in O-O vertical framework development -- finance, medical care, insurance separation of 'logic' from 'control' -- business rules distributed object technology -- heterogeneous systems visualisation -- structure and processes knowledge intensive applications -- declarative heterogeneous systems - fragmented applications

39. Summary

40. Themes and Variations terminology -- all phrases object computation -- message passing contracts -- for constructing and validating software

41. Paradigms ofprogramming styles of programming -- as a family of conventions data abstraction -- and its possible realizations polymorphism -- and the features of inheritance

42. The object-orientedsoftware life-cycle software development models -- in particular the role of prototyping software quality -- in relation to reuse and maintenance programming languages -- the choice of a vehicle

43. Beyond object-orientation? modeling -- patterns, UML components -- CORBA, (D)COM, Java heterogeneous systems -- separating logic and control

44. Questions

46. Further reading