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DesignPatterns

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

Creational — instantiation: 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

Structural — class and object composition.

1. Adapter – Match interfaces of different classes
2. Bridge – Separates an object’s 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

Behavioral — communication 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