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The document discusses object-oriented design principles and patterns. It covers topics like encapsulation, inheritance, polymorphism, the open-closed principle (OCP), dependency inversion, and architectural patterns like layered architectures and domain-driven design. Examples are provided to illustrate concepts like dependency injection and inversion of control. The conclusion emphasizes applying principles pragmatically based on user needs while aiming for maintainable code.

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Agnès CREPET @agnes_crepet Cyril LACÔTE @clacote 1st November – Gunadarma University Once upon a -Design- Time Object Oriented Design principles
Schedule ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A bit of history ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],In the beginning : the Go To statement Invoice: Process invoice go to Computation Credit: Process credit go to Computation Computation: Read account Compute amount Update account go to Read: End-File: close («file»)
Beyond the GOTO ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Structured Programming ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],ex : C language Reusable functions Control structures Methodology ?
Top–down approach ,[object Object],[object Object],[object Object],[object Object],Divide and conquer
Top–down approach File opening File processing File closing Invoice processing Asset processing Amount processing AccountRead AmountCompute AccountUpdate Amount processing... While there are records
Top–down approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Modularity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Towards Encapsulation ,[object Object],[object Object],[object Object],[object Object]
Objet Paradigm : kind of old ! ,[object Object],[object Object],[object Object],[object Object],[object Object]
Objet : motivations ,[object Object],[object Object],Abstraction start( ) accelerate( ) velocity mark Car
Why the object paradigm? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Doc Design Test Code Other Maintenance Source: DP Budget, Vol. 7, Dec 1998.
Objet Oriented design ,[object Object],[object Object],[object Object],[object Object],[object Object]
A good Objet Oriented design? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Design Patterns ,[object Object],[object Object],[object Object],[object Object],[object Object]
The idea of Design Patterns ,[object Object],[object Object],[object Object]
The challenge of the Design Patterns ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A basic principle : OCP (1/2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A basic principle : OCP (2/2) ,[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Good design principles
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Good Design Principles
[object Object],[object Object],[object Object],[object Object],[object Object],Object's foundations
Encapsulation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Go ! Brake ! To the left !
Encapsulation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Encapsulation ,[object Object],[object Object],[object Object],[object Object],DEMO!
Inheritance ,[object Object],[object Object],Generalization Specialization Person name : String eat() Employee name : String employer : String eat() work() Person name : String eat() Employee employer : String work()
Polymorphism ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Polymorphism's way to reach OCP DEMO!
Following upper principles ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Responsibilities assignment
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Responsibilities assignment
G.R.A.S.P : Information Expert ,[object Object],[object Object],[object Object],[object Object]
G.R.A.S.P : Creator ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
G.R.A.S.P. : Low coupling (1/2) ,[object Object]
[object Object],[object Object],[object Object],[object Object],G.R.A.S.P. : Low coupling (2/2)
G.R.A.S.P. : High cohesion ,[object Object],[object Object],[object Object],[object Object],Just do your job !
Watch for the fat ! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
So? How to ensure low coupling and high cohesion?
Dependency management Inversion of control
There will be consequences ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],A A A uses is linked to inherits of B B B
Dependency: a strategic move ! A B A B ? or ? ,[object Object],[object Object],[object Object],[object Object]
Dependency Inversion Principle ,[object Object],[object Object],[object Object],[object Object],[object Object]
DIP : put into play ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Inversion of control : principle ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Inversion of control : put into play ,[object Object],[object Object],[object Object],[object Object],[object Object]
Dependency injection : example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
1 - Elementary : without injection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Use: JMario j Mario = new JMario (); j Mario .onActionButton();
1 - Without injection : Appraisal ,[object Object],[object Object],[object Object],[object Object],[object Object]
2 - Manual injection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
2 - Manual injection : Appraisal ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3 - Injection with a container ,[object Object],[object Object],[object Object],[object Object],[object Object]
3 - Injection with a container ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Configuration by annotations (JEE6): public class JMario { @Inject private Suit suit; }
3 - Injection with a container : Appraisal ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Inversion of control : conclusion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
In vogue Design Patterns Convention over Configuration
Convention over configuration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Architectural Patterns 2 big families
Application Architecture : Example Java web Application Application layers (presentation, service, business… HTML/ JavaScript HTTP … and persistence) JDBC Browser Application Server (ex : JBoss) DataBase Server (Ex: Oracle) Application Outside (Company Information system) ? RDBMS
Architectural Patterns ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lean Service Oriented Architecture (SOA) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Facades Business Services Repository RDBMS Domain Objects
Domain Driven Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Repository SGBDR Domain Object
Conclusion
Conclusion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Stay humble, But think big !
Bibliography
Source Code on GitHub https://github.com/acrepet/JMarioGame
Bibliography ,[object Object],[object Object],[object Object],[object Object]
Bibliography ,[object Object],[object Object]
Bibliography ,[object Object],[object Object],[object Object],[object Object]
Bibliography : websites ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Design poo my_jug_en_ppt

  • 1. Agnès CREPET @agnes_crepet Cyril LACÔTE @clacote 1st November – Gunadarma University Once upon a -Design- Time Object Oriented Design principles
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  • 7. Top–down approach File opening File processing File closing Invoice processing Asset processing Amount processing AccountRead AmountCompute AccountUpdate Amount processing... While there are records
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  • 39. So? How to ensure low coupling and high cohesion?
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  • 56. In vogue Design Patterns Convention over Configuration
  • 57.
  • 58. Architectural Patterns 2 big families
  • 59. Application Architecture : Example Java web Application Application layers (presentation, service, business… HTML/ JavaScript HTTP … and persistence) JDBC Browser Application Server (ex : JBoss) DataBase Server (Ex: Oracle) Application Outside (Company Information system) ? RDBMS
  • 60.
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  • 66. Source Code on GitHub https://github.com/acrepet/JMarioGame
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Editor's Notes

  1. Commentaires
  2. Dijkstra : « plus court chemin » dans un graphe, algorithme du banquier, sémaphore.
  3. Polymorphisme d'héritage = Polymorphisme d'inclusion  redéfinition/spécialisation de méthodes durant l'héritage (overriding) Polymorphisme paramétrable  Les types génériques, introduits avec Java 5, donnent la possibilité de ne pas devoir contrôler le type d'une valeur lors de l'exécution, ils permettent de définir des comportements communs sur des objets sans devoir les typer Polymorphisme ad hoc = surcharge de méthodes (overloading)  capacité de distinguer des opérations par la signature (avec types et arguments différents) plutôt que par le seul nom
  4. une configuration par défaut (convention par règle de nommage) mais permettront aussi la substitution des valeurs par défaut via la configuration (à partir des fichiers ou une autre source de données).
  5. Expliquer l’origine historique du concept : issu de l’architecture de bâtiments.