![Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],26/11/08 Author: Frederico Gonçalves](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Design Patterns
- 1. About Patterns, Principles and Practices of Object Oriented Design Design Patterns 26/11/08 Author: Frederico Gonçalves
- 9. GoF Patterns Catalogue 26/11/08 Author: Frederico Gonçalves Purpose Creational Structural Behavioral Scope Class Factory Method Adapter (class) Interpreter Template Method Object Abstract Factory Builder Prototype Singleton Adapter (Object) Bridge Composite Decorator Facade Flyweight Proxy Chain of Responsibility Command Iterator Mediator Memento Observer State Strategy Visitor
- 15. Principles Behind Patterns 26/11/08 Author: Frederico Gonçalves New requirement: Knights and Orcs shall attack with a sword, Elfos shall use arrows.
- 16. Principles Behind Patterns 26/11/08 Author: Frederico Gonçalves Overwrite attack
- 17. Principles Behind Patterns 26/11/08 Author: Frederico Gonçalves But also need to overwrite method with all implementation for future Characteres Bad code reuse! Overwrite attack
- 18. Principles Behind Patterns 26/11/08 Author: Frederico Gonçalves Create arrowAtack()
- 19. Principles Behind Patterns 26/11/08 Author: Frederico Gonçalves This leads to all characteres Inheriting a behavior they may not use Bad reuse! Create arrowAtack()
- 21. Principles Behind Patterns 26/11/08 Author: Frederico Gonçalves Flexible design to include new behaviours, apply them to different characters and change it at run time
- 22. Principles Behind Patterns 26/11/08 Author: Frederico Gonçalves Strategy captures design principles to create a flexible solution for changing algorithms problems
- 23. Principles Behind Patterns 26/11/08 Author: Frederico Gonçalves Strategy captures design principles to create a flexible solution for changing algorithms problems Apply the patterns with criteria, extra complexity shall add value to your solution
- 29. When to Apply Patterns 26/11/08 Author: Frederico Gonçalves Analysis is the identification of essential system characteristics, concepts and capabilities to create an initial design
- 30. When to Apply Patterns 26/11/08 Author: Frederico Gonçalves Analysis object model is a composition of objects that reflect your business. However the solution is not optimized Analysis is the identification of essential system characteristics, concepts and capabilities to create an initial design
- 32. When to Apply Patterns 26/11/08 Author: Frederico Gonçalves Design is the selection of one particular solution which optimizes the set of design criteria with respect to the relative importance of each
- 33. When to Apply Patterns 26/11/08 Author: Frederico Gonçalves In the Design we should optimize the Analysis Model according to design criteria and using design patterns Design is the selection of one particular solution which optimizes the set of design criteria with respect to the relative importance of each
- 34. When to Apply Patterns 26/11/08 Author: Frederico Gonçalves In the Design we should optimize the Analysis Model according to design criteria and using design patterns Patterns help to identify less obvious abstractions (which are rarely found at first modelling) and the objects that can capture them Design is the selection of one particular solution which optimizes the set of design criteria with respect to the relative importance of each