Sunday, September 26, 2010

Design Patterns overview

A good web site on this topic :
You can clic on any of the pattern below to have more details.
Here you can find a example of the 4 types of software architecture :

Creational Patterns
  Creates an instance of several families of classes
  Separates object construction from its representation
  Creates an instance of several derived classes
  A fully initialized instance to be copied or cloned
  A class of which only a single instance can exist

  Structural Patterns
  Match interfaces of different classes
  Separates an object’s interface from its implementation
  A tree structure of simple and composite objects
  Add responsibilities to objects dynamically
  A single class that represents an entire subsystem
  A fine-grained instance used for efficient sharing
  An object representing another object

  Behavioral Patterns
  A way of passing a request between a chain of objects
  Encapsulate a command request as an object
  A way to include language elements in a program
  Sequentially access the elements of a collection
  Defines simplified communication between classes
  Capture and restore an object's internal state
  A way of notifying change to a number of classes
  Alter an object's behavior when its state changes
  Encapsulates an algorithm inside a class
  Defer the exact steps of an algorithm to a subclass
  Defines a new operation to a class without change

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