miercuri, 14 octombrie 2009

[DesignPattern] About

A bad design:
- Rigidity
- Fragility
- Immobility

- Open Close Principle
      - open for extensions
      - close for modifications
- Dependency Inversion Principle
       - high level modules should not depend on low level modules
       - abstract should not depend on details
- Interface Segregation Principle
       - interfaces should be minimal and complete
- Liskov's Substitution Principle
       - derives types must be completely substitutable for their base type

- purpose
  • creational
  • structural (Structural patterns are concerned with how classes and objects are composed to form larger structures.)
  • behavioral
- scope
  • class
  • object

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