Behavioral patterns. Command Iterator Observer Strategy Template method
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1 Designpatterns
2 Behavioral patterns Command Iterator Observer Strategy Template method
3 Command Invoker: asks the command to carry out the Command: defines an interface for executing an operation or set of Concrete command: implements the Command Interface to perform the operation. Typically acts as an intermediaryto a Receiver mand Receiver: knows how to carry out the
4 Iterator Iterator: Interface for accessing and traversing Concrete Iterator: implements Iterator and keeps track of curren Aggregate: defines an interface for creating an Concrete Aggregate: hold the data. Implements the creation interface to manufacture an e
5 Observer Subject: notifies Observers that some event has occurred. Keeps a subscription list and a means for modifying the list. Sometimes the Subject is an interface implemented by Concrete ObserverPattern.Subject Observer: defines an interface for notifying ObserverPattern.Observer Concrete Observer: implements the Observer interface to do something when ObserverPattern.ConcreteObserv er
6 Strategy Strategy: interface that allows access to an StrategyPattern.Strategy Concrete Strategy: implemetsa particular algorithm to conform to the Strategy StrategyPattern.ConcreteStr ategy Context: uses the algorithm through the Strategy StrategyPattern.Context
7 Template method Abstract Class:defines an algorithm that uses primitive operations that are supplied by a TemplateMethodPattern.AbstractClass Concrete Class: implements the Concrete Class: implements the primitive TemplateMethodPattern.ConcreteClass
8 Creational patterns Abstract Factory Singleton
9 Abstract Factory Abstract Factory: interface to the actual ctfactory Concrete Factory: implements the AbstratFactory interface to create a specific class of AbstractFactoryPattern. AbstractFactory Abstract Product: the sort of product that the Abstract Factory AbstractFactoryPattern. AbstractProduct Concrete Product: the actual object created by the AbstractFactoryPattern. ConcreteProduct
10 Singleton Singleton: the object being created; defines a class-level (static) get-instance method that returns the instance. The class-level get-instance may create the object if SingletonPattern. Singleton
11 Structural patterns Adapter Composite Decorator Façade Proxy
12 Adapter Adaptee: an object that does not support the desired AdapterPattern. Adaptee Adapter: the class that makes the Adapteeappear to support the desired AdapterPattern. Adapter
13 Composite Component: an interface or abstract class that represents all objects in the CompositePattern.Component Composite: a Component that can hold other Components. It doesn t know whether these subcomponents are other Composites or are CompositePattern.Composite Leaf: a Component that stands
14 Decorator Component: an interface for objects that can have responsibilities added to DecoratorPattern.Component Concrete Component: an object to whickadditional responsibilities or new behaviour is DecoratorPattern. ConcreteComponent Decorator: wraps a Component and defines an interface that conforms to the Componen sinterface but behaves DecoratorPattern.Decorator Concrete Decorator: extends the Decorator to define the additional DecoratorPattern. ConcreteDecorator
15 Façade Facade:provides a simple interface to a complex FacadePattern
16 Proxy Proxy: maintains a reference and controls access to the Real Subject. Implements the same interface as the Real Subject so it can be used in the place of the Real ProxyPattern. Proxy Subject: an interface implemented by bththe Proxy and the Real Subject; allowed to use them ProxyPattern.Subject Real Subject: the real object that the Proxy ProxyPattern.RealSubject ProxyPattern.Client
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