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Uploaded byAnthony Ferrara
Beyond design patterns phpnw14
The document discusses the limitations of learning object-oriented design exclusively from design patterns and emphasizes the broader aspects of object-oriented design, such as communication, interaction, and abstraction. It categorizes various design patterns, particularly the Gang of Four patterns, and contrasts different groupings and functionalities of these patterns. The document ultimately advocates for a focus on problem-solving in object-oriented programming, rather than merely identifying design patterns.
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Beyond design patterns phpnw14
- 1. Beyond Design Patterns A Guide To Better OOP
- 2. OR: Why Learning Object-Oriented Design From Design Patterns Is Bad
- 3. Object Oriented Design … is the process of planning a system of interacting objects for the purpose of solving a software problem. -Wikipedia
- 4. What Are Design Patterns?
- 5. What Are Design Patterns? ● Commonly Occurring Solutions?
- 6. What Are Design Patterns? ● Commonly Occurring Solutions? ● Commonly Occurring Structures?
- 7. What Are Design Patterns? ● Commonly Occurring Solutions? ● Commonly Occurring Structures? ● Commonly Occurring Limitations?
- 8. What Are Design Patterns? ● Commonly Occurring Solutions? ● Commonly Occurring Structures? ● Commonly Occurring Limitations? ● All Of The Above?
- 9. What Are Design Patterns? All Of The Above!
- 10. What Kind OfDesign Patterns Are There?
- 11. Gang-Of-Four Design Patterns Creational Abstract Factory Builder Factory Method Object Pool Prototype
- 12. Gang-Of-Four Design Patterns Creational Structural Abstract Factory Builder Factory Method Object Pool Prototype Adapter Bridge Composite Decorator Facade Flyweight Proxy
- 13. Gang-Of-Four Design Patterns Creational Structural Behavioral Abstract Factory Builder Factory Method Object Pool Prototype Adapter Bridge Composite Decorator Facade Flyweight Proxy Chain Of Responsibility Command Interpreter Iterator Mediator Memento Null Object Observer Strategy Template Method
- 14. Let’s Try ADifferent Organization
- 15. Gang-Of-Four Design Patterns Shim Flyweight Iterator Null Object Object Pool Prototype Re-Grouped
- 16. Gang-Of-Four Design Patterns Re-Grouped Shim Compositional Flyweight Iterator Null Object Object Pool Prototype Adapter Builder Decorator Facade Interpreter Mediator Observer Proxy
- 17. Gang-Of-Four Design Patterns Re-Grouped Shim Compositional Decompositional Flyweight Iterator Null Object Object Pool Prototype Adapter Builder Decorator Facade Interpreter Mediator Observer Proxy Abstract Factory Bridge Chain Of Responsibility Command Factory Method Mediator Memento Observer Proxy Strategy Template Method
- 18. Compare Groupings CreationalStructural Behavioral Shim Abstract Factory Object Pool Prototype Flyweight Iterator Null Object Compositional Builder Adapter Composite Decorator Facade Proxy Interpreter Mediator Observer Decompositional Factory Method Bridge Composite Proxy Chain Of Responsibility Command Mediator Memento Observer Strategy Template Method
- 19. Let’s Examine 5Patterns More Closely
- 20. Compare Groupings CreationalStructural Behavioral Shim Abstract Factory Object Pool Prototype Flyweight Iterator Null Object Compositional Builder Adapter Composite Decorator Facade Proxy Interpreter Mediator Observer Decompositional Factory Method Bridge Composite Proxy Chain Of Responsibility Command Mediator Memento Observer Strategy Template Method
- 21. Adapter use PsrLogLoggerInterfaceas Log class PSR3Logger implements Log { public function log($level, $msg, array $ctx = array()) { $severity = $this->convertLevelToSeverity($level); watchdog(“unknown”, $msg, $ctx, $severity); } /* ... */ }
- 22. Facade class EntityMetadataWrapper{ public function __construct($type, $data = null, $info = array()) { $this->type = $type; $this->info = $info + array( “langcode” => null, ); $this->info[“type”] = $type; if (isset($data)) { $this->set($data); } } /* ... */ }
- 23. Adapter vs Facade Class 1 Class 2 Class 3 Class n Class 1 Class m Existing Code Other Code “Pattern” Code Class 1 Class 2 Class 3 Class n API
- 24. Adapter vs Facade Class 1 Class 2 Class 3 Class n Class 1 Class m Existing Code Other Code “Pattern” Code Class 1 Class 2 Class 3 Class n API API Exists? Adapter
- 25. Adapter vs Facade Class 1 Class 2 Class 3 Class n Class 1 Class m Existing Code Other Code “Pattern” Code Class 1 Class 2 Class 3 Class n API API Exists? Adapter New API? Facade
- 26. They Look The Same!!!???
- 27. Adapter Facade BridgeDecorator Proxy
- 28. They All LookThe Same!!!???
- 29. Adapter Facade BridgeDecorator Proxy
- 30. Adapter Facade TheCode Is The Same The Why Is Different Bridge Decorator Proxy
- 31. DeDuplicated Groupings CreationalStructural Behavioral Compositional Adapter Composite Mediator Observer Decompositional Adapter Composite Command Mediator Memento Observer
- 32. DeDuplicated Re-Groupings Multiple Systems? Single System? Single Objects? Information Flow? Mediator Command Observer Structure Adapter Composite Memento
- 33. DeDeDuplicated Re-Groupings Pattern Information Flow? Mediator Structure Adapter
- 34. DeDeDuplicated ReRe-Groupings Pattern Information Flow? Mediator
- 35. All Design PatternsDo The Same Thing:
- 36. All Design PatternsDo The Same Thing: Control Information Flow
- 37. So Let’s TalkAbout Information Flow
- 38. So Let’s TalkAbout Communication
- 39.
- 40.
- 41. Message Vs Logic State
- 42. Message Vs Logic Messages State
- 43. Message Vs Logic Messages State Logic
- 44. Message Vs Logic Messages State Logic HERE BE DRAGONS
- 45. Why Break ThemApart? Logic Hybrid Message Purpose Behavior General Code State State Stateless Stateful Stateful Paradigm Functional OOP? Data
- 46. Ask $msg =$obj->something(); Logic Hybrid Message No Yes Yes
- 47. Tell $obj->something($msg); LogicHybrid Message No Yes Yes
- 48. Translate $msg2 =$obj->do($msg); Logic Hybrid Message Yes Yes No
- 49. Everything Else IsA Combination Of These Atoms
- 50.
- 51. Note: Ask IsAlways Stateful
- 52. Note: Ask IsAlways Stateful Tell Is Always Stateful
- 53. Note: Ask IsAlways Stateful Tell Is Always Stateful Translate Can Be Stateless
- 54. Why Does ThisMatter?
- 55. It Lets UsAnalyze Object Roles
- 56. Object Role Patterns State? Logic? Mode
- 57. Object Role Patterns State? Logic? Mode Representer User No Ask/Tell
- 58. Representer class User{ public function getName(); public function isAdmin(); public function setName($name); }
- 59. Object Role Patterns State? Logic? Mode Representer User No Ask/Tell Doer No Yes Tell
- 60. Doer class EmailSystem{ /** * @return boolean */ public function send(Message $msg); }
- 61. Object Role Patterns State? Logic? Mode Representer User No Ask/Tell Doer No Yes Tell Dispatcher System No Translate
- 62. Dispatcher class Controller{ /** * @return Response */ public function handle(Request $req); }
- 63. Object Role Patterns State? Logic? Mode Representer User No Ask/Tell Doer No Yes Tell Dispatcher System No Translate Translator No Yes Translate
- 64. Translator class UserView{ /** * @return string HTML */ public function render(User $user); }
- 65. Object Role Patterns State? Logic? Mode Representer User No Ask/Tell Doer No Yes Tell Dispatcher System No Translate Translator No Yes Translate Maker System Yes Ask
- 66. Makers class UserFactory{ /** * @return User a user object */ public function getUser(); }
- 67. Object Role Patterns State? Logic? Mode Representer User No Ask/Tell Doer No Yes Tell Dispatcher System No Translate Translator No Yes Translate Maker System Yes Ask
- 68. Object Role Patterns Representer Doer Dispatcher Translator Maker
- 69. Object Oriented Design … is the process of planning a system of interacting objects for the purpose of solving a software problem. -Wikipedia
- 70. Object Oriented Design … is the process of planning a system of interacting objects for the purpose of solving a software problem. -Wikipedia
- 71. Design Patterns AreImportant! And Should Be Used!
- 72. But OOP IsNot About “Finding The Correct Pattern”
- 73. Focus on: Communication Interaction And Abstraction
- 74. Remember: OOP IsAbout Solving Problems
- 75. Anthony Ferrara joind.in/11796 @ircmaxell me@ircmaxell.com blog.ircmaxell.com github.com/ircmaxell youtube.com/ircmaxell