{"id":8969,"date":"2020-08-24T11:05:10","date_gmt":"2020-08-24T02:05:10","guid":{"rendered":"https:\/\/www.gigas-jp.com\/appnews\/?p=8969"},"modified":"2020-08-21T19:24:12","modified_gmt":"2020-08-21T10:24:12","slug":"abstract-factory-design-pattern","status":"publish","type":"post","link":"https:\/\/www.gigas-jp.com\/appnews\/archives\/8969","title":{"rendered":"Abstract Factory Design Pattern"},"content":{"rendered":"\n

Abstract Factory defines an interface to create all the different products, but leaves the actual creation of the product to specific factory classes. Each type of factory corresponds to a certain variety of product.<\/p>\n\n\n\n

The client code calls the methods of creating a factory object instead of creating products directly with a call to the constructor (new operator). Since a factory corresponds to a single product variant, all of its products will be compatible.<\/p>\n\n\n\n

The client code works with factories and products only through their abstract interfaces. This allows the client code to work with any product variant, created by the factory object. <\/p>\n\n\n\n

C# code sample<\/font><\/font><\/p>\n\n\n\n

using System;\n\nnamespace HelloWorld\n{\n    \/**\n * Define the Factory interface first.\n *\/\n    abstract class TvSetFactory\n    {\n        public abstract Tv createTv();\n        public abstract CdPlayer createCdPlayer();\n    }\n\n    \/**\n     * Then I will create related factory classes and implements the interface\n     * Panasonic  Factory & SamsaungFactory in this scenario.\n     *\/\n    class PanasonicFactory : TvSetFactory\n    {\n        public override Tv createTv()\n        {\n            return new PanasonicTv();\n        }\n\n        public override CdPlayer createCdPlayer()\n        {\n            return new PanasonicCdPlayer();\n        }\n    }\n\n    class SamsaungFactory : TvSetFactory\n    {\n        public override Tv createTv()\n        {\n            return new SamsaungTv();\n        }\n\n        public override CdPlayer createCdPlayer()\n        {\n            return new SamsaungCdPlayer();\n        }\n\n    }\n\n    \/**\n     * Now lets build family of object classes.\n     * Tv & CdPlayer in this scenario.\n     *\/\n    abstract class Tv\n    {\n        public abstract string getTv();\n    }\n\n    \/**\n     * These classes have to be implemented by their relative factory.\n     *\/\n    class PanasonicTv : Tv\n    {\n        public override string getTv()\n        {\n            return \"PanasonicTv\";\n        }\n    }\n\n    class SamsaungTv : Tv\n    {\n        public override string getTv()\n        {\n            return \"SamsaungTv\";\n        }\n    }\n\n    abstract class CdPlayer\n    {\n        public abstract string getCdPlayer();\n    }\n\n    class PanasonicCdPlayer : CdPlayer\n    {\n        public override string getCdPlayer()\n        {\n            return \"PanasonicCdPlayer\";\n        }\n    }\n\n    class SamsaungCdPlayer : CdPlayer\n    {\n        public override string getCdPlayer()\n        {\n            return \"SamsaungCdPlayer\";\n        }\n    }\n\n\n    \/\/ client code\n    \/**\n     * Now you can call the specific factory to return family of objects without knowing their own detail implementations.\n     * if you want to get samsaung products, you just need to change the Factory class to samsaung factory.\n     *\/\n\n    class Program\n    {\n        static void Main(string[] args)\n        {\n            var tv = new PanasonicFactory();\n            Console.WriteLine(tv.createTv().getTv());\n\n            var cdPlayer = new PanasonicFactory();\n            Console.WriteLine(cdPlayer.createCdPlayer().getCdPlayer());\n\n        }\n    }\n\n}<\/code><\/pre>\n\n\n\n
PHP code sample<\/p>\n\n\n\n
<?php\n\n\/**\n * Define the Factory interface first.\n *\/\nabstract class TvSetFactory\n{\n    abstract function createTv();\n    abstract function createCdPlayer();\n}\n\n\/**\n * Then I will create related factory classes and extends the interface\n * Panasonic  Factory & SamsaungFactory in this scenario.\n *\/\nclass PanasonicFactory extends TvSetFactory\n{\n    public function createTv()\n    {\n        return new PanasonicTv;\n    }\n\n    public function createCdPlayer()\n    {\n        return new PanasonicCdPlayer();\n    }\n}\n\nclass SamsaungFactory extends TvSetFactory\n{\n    public function createTv()\n    {\n        return new SamsaungTv;\n    }\n\n    public function createCdPlayer()\n    {\n        return new SamsaungCdPlayer();\n    }\n\n}\n\n\/**\n * Now lets build family of object classes.\n * Tv & CdPlayer in this scenario.\n *\/\nabstract class Tv\n{\n    abstract function getTv();\n}\n\n\/**\n * These classes have to be implemented by their relative factory.\n *\/\nclass PanasonicTv extends Tv\n{\n    public function getTv()\n    {\n        return \"PanasonicTv\";\n    }\n}\n\nclass SamsaungTv extends Tv\n{\n    public function getTv(): string\n    {\n        return \"SamsaungTv\";\n    }\n}\n\nabstract class CdPlayer\n{\n    abstract function getCdPlayer();\n}\n\nclass PanasonicCdPlayer extends CdPlayer\n{\n    public function getCdPlayer()\n    {\n        return \"PanasonicCdPlayer\";\n    }\n}\n\nclass SamsaungCdPlayer extends CdPlayer\n{\n  public function getCdPlayer()\n  {\n      return \"SamsaungCdPlayer\";\n  }\n}\n\n\n\/\/ client code\nfunction test($tvSetFactory)\n{\n    $tv = $tvSetFactory->createTv();\n    echo('TV model is'.$tv->getTv());\n\n    $cdPlayer = $tvSetFactory->createCdPlayer();\n    echo('CD Player model is'.$cdPlayer->getCdPlayer());\n}\n\n\/**\n * Now you can call the specific factory to return family of objects without knowing their own detail implementations.\n * if you want to get samsaung products, you just need to change the Factory class to samsaung factory.\n *\/\n$tvSetFactory = new PanasonicFactory;\ntest($tvSetFactory);<\/code><\/pre>\n\n\n\n
By Yuuma<\/p>\n
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<\/g:plusone><\/div>\n            
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