DesignPatterns

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This material is summarized from http://sourcemaking.com/design_patterns.

Creationalinstantiation: class creation and object creation.

  1. Abstract Factory – Creates an instance of several families of classes
  2. Builder – Separates object construction from its representation
  3. Factory Method – Creates an instance of several derived classes
  4. Object Pool – Avoid expensive acquisition and release of resources by recycling objects that are no longer in use
  5. Prototype – A fully initialized instance to be copied or cloned
  6. Singleton – A class of which only a single instance can exist

Structuralclass and object composition.

  1. Adapter – Match interfaces of different classes
  2. Bridge – Separates an objectís interface from its implementation
  3. Composite – A tree structure of simple and composite objects
  4. Decorator – Add responsibilities to objects dynamically
  5. Facade – A single class that represents an entire subsystem
  6. Flyweight – A fine-grained instance used for efficient sharing
  7. Private Class Data – Restricts accessor/mutator access
  8. Proxy – An object representing another object

Behavioralcommunication among objects.

  1. Chain of responsibility – A way of passing a request between a chain of objects
  2. Command – Encapsulate a command request as an object
  3. Interpreter – A way to include language elements in a program
  4. Iterator – Sequentially access the elements of a collection
  5. Mediator – Defines simplified communication between classes
  6. Memento – Capture and restore an object's internal state
  7. Null Object – Designed to act as a default value of an object
  8. Observer – A way of notifying change to a number of classes
  9. State – Alter an object's behavior when its state changes
  10. Strategy – Encapsulates an algorithm inside a class
  11. Template method – Defer the exact steps of an algorithm to a subclass
  12. Visitor – Defines a new operation to a class without changes