Design mode 18: Bridging mode (bridge)

Bridging mode:
Separate the abstract and its implementation parts so that they can vary individually.

UML diagram:

Mainly include:

1. Abstraction: An interface that defines an abstract part that operates a reference to an implementation part of an object.
2. Refinedabstraction: A class that inherits from the abstract part.
3. Implementor: Implements the part of the interface.
4. Concreteimplementor: Implements a specific class of interfaces defined by Implementor.

The C + + code is as follows:

#include <iostream>usingNamespace Std;class implementor{ Public:Virtual void Operationimpl()=0;}; Class Concreteimplementora: Publicimplementor{ Public:void Operationimpl() {cout<<"Concreteimplementora::operationimpl"<<endl; }};class Concreteimplementorb: Publicimplementor{ Public:void Operationimpl() {cout<<"Concreteimplementorb::operationimpl"<<endl; }};class abstraction{ Public:Virtual void Operation()=0;voidSetimplementor (Implementor * i) {impl=i; } implementor * Getimplementor () {returnImpl }protected: Implementor * IMPL; };class refinedabstraction: Publicabstraction{ Public:void Operation() {Impl->operationimpl (); }};intMain () {cout<<"Bridging mode Example"<<endl; Abstraction * ab=NewRefinedabstraction (); Implementor * cia=NewConcreteimplementora ();    Ab->setimplementor (CIA);    Ab->operation (); Implementor * cib=NewConcreteimplementorb ();    Ab->setimplementor (CIB);    Ab->operation ();    Delete CIA;    Delete CIB; Delete ab;return 0;}

Execution output:

Here is a concrete example of this specific example that may well be understood, excerpted from the Big Talk design pattern:

1. Abstraction is the phone (mobile).
2. Refinedabstraction is Samsung (Samsung mobile), (Mobile).
3. Implementor for Game (mobile games).
4. Concreteimplementor for Needforspeed (need for Speed), Qqgame (QQ game), Fruitninjia (Fruit Ninja).

UML Class diagrams are:

C + + code:

#include <iostream>using namespace STD;classgame{ Public:Virtual voidPlay () =0;};classNeedforspeed: Publicgame{ Public:Virtual voidPlay () {cout<<"Need for Speed play"<<endl; }};classQqgame: Publicgame{ Public:Virtual voidPlay () {cout<<"Qqgame Play"<<endl; }};classFruitninjia: Publicgame{ Public:Virtual voidPlay () {cout<<"Fruit Ninjia Play"<<endl; }};classphone{ Public:Virtual voidRun () =0;voidSetgame (Game *g) {game=g; } Game * Getgame () {returnGame }protected: Game *game;};classSamsung: Publicphone{ Public:Virtual voidRun () {cout<<"Samsung:";    Game->play (); }};class: Publicphone{ Public:Virtual voidRun () {cout<<   Game->play (); }};intMain () {cout<<"Bridging mode real examples, different mobile phone brands and mobile games"<<endl; Phone *samsung=NewSamsung (); Phone *=New (); Game * needforspeed=NewNeedforspeed (); Game * qqgame=NewQqgame (); Game * fruit=NewFruitninjia ();    Samsung->setgame (Qqgame);    Samsung->run ();    ->setgame (Needforspeed);    ->run ();    Samsung->setgame (fruit); Samsung->run ();DeleteSamsungDeleteDeleteNeedforspeed;DeleteQqgame;DeleteFruitreturn 0;}

Execution output:

Design mode 18: Bridging mode (bridge)