Applying Object Composition to Build Rich Domain Models
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The document discusses applying object composition to create rich domain models, focusing on examples involving various animal classifications and their behaviors. It highlights the concept of logic duplication without true code duplication, illustrating how different animal types (mammals, water mammals, birds, etc.) can share behaviors in a structured way. Additionally, it provides links to a webinar for further exploration of the topic.
Applying Object Composition to Build Rich Domain Models
- 1. Applying Object Composition to Build Rich Domain Models Zoran Horvat CEO & Principal Consultant, Coding Helmet Consultancy [email protected] http://codinghelmet.com zoranh75
- 3. Watch the webinar recording here: https://www.postsharp.net/blog/we binar-recording-object-composition
- 14. Animal obj = ...
- 15. Animal obj = ... if (obj is Mammal) { }
- 16. Animal obj = ... if (obj is Mammal) { Mammal mammal = (Mammal)obj; // e.g. a tiger }
- 17. Animal obj = ... if (obj is Mammal) { Mammal mammal = (Mammal)obj; // e.g. a tiger // Pull mammal’s tail using all your strength }
- 18. Animal obj = ... if (obj is Mammal) { Mammal mammal = (Mammal)obj; // e.g. a tiger // Pull mammal’s tail using all your strength // Run as fast as you can }
- 19. Animal obj = ... if (obj is Mammal) { Mammal mammal = (Mammal)obj; // e.g. a tiger // Pull mammal’s tail using all your strength // Run as fast as you can }
- 22. Animal obj = ... if (obj is Mammal) { Mammal mammal = (Mammal)obj; // e.g. a tiger // Pull mammal’s tail using all your strength // Run as fast as you can }
- 23. Animal obj = ... if (obj is Mammal) { Mammal mammal = (Mammal)obj; // e.g. a tiger // Pull mammal’s tail using all your strength // Run as fast as you can } else if (obj is WaterMammal) { WaterMammal mammal = (WaterMammal)obj; // e.g. a whale // Pull mammal’s fins using all your strength // Swim as fast as you can }
- 24. Animal obj = ... if (obj is Mammal) { Mammal mammal = (Mammal)obj; // e.g. a tiger // Pull mammal’s tail using all your strength // Run as fast as you can } else if (obj is WaterMammal) { WaterMammal mammal = (WaterMammal)obj; // e.g. a whale // Pull mammal’s fins using all your strength // Swim as fast as you can }
- 25. Logic duplication, but no true code duplication! Animal obj = ... if (obj is Mammal) { Mammal mammal = (Mammal)obj; // e.g. a tiger // Pull mammal’s tail using all your strength // Run as fast as you can } else if (obj is WaterMammal) { WaterMammal mammal = (WaterMammal)obj; // e.g. a whale // Pull mammal’s fins using all your strength // Swim as fast as you can } .
- 26. Logic duplication, but no true code duplication! Animal obj = ... if (obj is Mammal) { Mammal mammal = (Mammal)obj; // e.g. a tiger // Pull mammal’s tail using all your strength // Run as fast as you can } else if (obj is WaterMammal) { WaterMammal mammal = (WaterMammal)obj; // e.g. a whale // Pull mammal’s fins using all your strength // Swim as fast as you can } .
- 38. Watch the webinar recording here: https://www.postsharp.net/blog/we binar-recording-object-composition
- 48. Watch the webinar recording here: https://www.postsharp.net/blog/we binar-recording-object-composition
- 49. Animal Classification Environment Abilities
- 50. Animal Classification Environment Abilities Mammal Ground Walk, Run
- 51. Animal Classification Environment Abilities Mammal Ground Walk, Run Mammal Ground Walk, Run
- 52. Animal Classification Environment Abilities Mammal Ground Walk, Run Mammal Ground Walk, Run Bird Ground Walk, Run Bird Ground Walk, Run
- 53. Animal Classification Environment Abilities Mammal Ground Walk, Run Mammal Ground Walk, Run Bird Ground Walk, Run Bird Ground Walk, Run Reptile Ground Walk
- 54. Animal Classification Environment Abilities Mammal Ground Walk, Run Mammal Ground Walk, Run Bird Ground Walk, Run Bird Ground Walk, Run Reptile Ground Walk Gastropod Ground Walk (?)
- 55. Animal Classification Environment Abilities Mammal Ground Walk, Run Mammal Ground Walk, Run Bird Ground Walk, Run Bird Ground Walk, Run Reptile Ground Walk Gastropod Ground Walk (?) Mammal SaltWater Surface, Dive, Underwater Mammal SaltWater Surface, Dive, Underwater
- 56. Animal Classification Environment Abilities Mammal Ground Walk, Run Mammal Ground Walk, Run Bird Ground Walk, Run Bird Ground Walk, Run Reptile Ground Walk Gastropod Ground Walk (?) Mammal SaltWater Surface, Dive, Underwater Mammal SaltWater Surface, Dive, Underwater BonyFish SaltWater Underwater, Glide BonyFish FreshWater Underwater
- 57. Animal Classification Environment Abilities Mammal Ground Walk, Run Mammal Ground Walk, Run Bird Ground Walk, Run Bird Ground Walk, Run Reptile Ground Walk Gastropod Ground Walk (?) Mammal SaltWater Surface, Dive, Underwater Mammal SaltWater Surface, Dive, Underwater BonyFish SaltWater Underwater, Glide BonyFish FreshWater Underwater Bird Air, Ground Fly, Walk Bird Air, Ground Fly
- 58. Animal Classification Environment Abilities Mammal Ground Walk, Run Mammal Ground Walk, Run Bird Ground Walk, Run Bird Ground Walk, Run Reptile Ground Walk Gastropod Ground Walk (?) Mammal SaltWater Surface, Dive, Underwater Mammal SaltWater Surface, Dive, Underwater BonyFish SaltWater Underwater, Glide BonyFish FreshWater Underwater Bird Air, Ground Fly, Walk Bird Air, Ground Fly Mammal Ground Walk, Run, Glide
- 59. Animal Classification Environment Abilities Mammal Ground Walk, Run Mammal Ground Walk, Run Bird Ground Walk, Run Bird Ground Walk, Run Reptile Ground Walk Gastropod Ground Walk (?) Mammal SaltWater Surface, Dive, Underwater Mammal SaltWater Surface, Dive, Underwater BonyFish SaltWater Underwater, Glide BonyFish FreshWater Underwater Bird Air, Ground Fly, Walk Bird Air, Ground Fly Mammal Ground Walk, Run, Glide Mammal Air, Ground Fly
- 68. Double dispatch ability.Accept(visitor); void Run.Accept(AbilityVisitor visitor) { visitor.Accept(this); // Accept(Run) }
- 69. Watch the webinar recording here: https://www.postsharp.net/blog/we binar-recording-object-composition
- 70. Questions? Zoran Horvat CEO & Principal Consultant, Coding Helmet Consultancy [email protected] http://codinghelmet.com zoranh75