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Detailed explanation of the adapter pattern of PHP design patterns
Detailed explanation of the adapter pattern of PHP design patterns
Convert the operations of certain similar classes into a unified "interface" (here is a metaphor)--Adapter, or metaphorically as an "interface", unifying or shielding those Class details. Adapter pattern also constructs a "mechanism" so that "adaptive" classes can be easily added or deleted without modifying the code that interacts with Adapter, in line with "reduce code" The design principle of "inter-coupling"
<?php
/*
* 适配器模式
*/
abstract class Toy
{
public abstract function openMouth();
public abstract function closeMouth();
}
class Dog extends Toy
{
public function openMouth()
{
echo "Dog open Mouth\n";
}
public function closeMouth()
{
echo "Dog close Mouth\n";
}
}
class Cat extends Toy
{
public function openMouth()
{
echo "Cat open Mouth\n";
}
public function closeMouth()
{
echo "Cat close Mouth\n";
}
}
//目标角色:红枣遥控公司
interface RedTarget
{
public function doMouthOpen();
public function doMouthClose();
}
//目标角色:绿枣遥控公司及
interface GreenTarget
{
public function operateMouth($type = 0);
}
//类适配器角色:红枣遥控公司
class RedAdapter implements RedTarget
{
private $adaptee;
function __construct(Toy $adaptee)
{
$this->adaptee = $adaptee;
}
//委派调用Adaptee的sampleMethod1方法
public function doMouthOpen()
{
$this->adaptee->openMouth();
}
public function doMouthClose()
{
$this->adaptee->closeMouth();
}
}
//类适配器角色:绿枣遥控公司
class GreenAdapter implements GreenTarget
{
private $adaptee;
function __construct(Toy $adaptee)
{
$this->adaptee = $adaptee;
}
//委派调用Adaptee：GreenTarget的operateMouth方法
public function operateMouth($type = 0)
{
if ($type) {
$this->adaptee->openMouth();
} else {
$this->adaptee->closeMouth();
}
}
}
class testDriver //客户端，客户想要那种就实现那种
{
public function run()
{
//实例化一只狗玩具
$adaptee_dog = new Dog();
echo "没有适配器的普通模式";
$adaptee_dog->openMouth();
$adaptee_dog->closeMouth();
echo "给狗套上红枣适配器\n";
$adapter_red = new RedAdapter($adaptee_dog);
//张嘴
$adapter_red->doMouthOpen();
//闭嘴
$adapter_red->doMouthClose();
echo "给狗套上绿枣适配器\n";
$adapter_green = new GreenAdapter($adaptee_dog);
//张嘴
$adapter_green->operateMouth(1);
//闭嘴
$adapter_green->operateMouth(0);
}
}
$test = new testDriver();
$test->run();The adapter pattern converts existing interfaces into interfaces expected by client classes and realizes the reuse of existing classes. It is a A very frequently used design pattern
Related recommendations:
Introduction to the php adapter pattern
Code analysis for adaptations such as PHP adapter mode
Introduction to PHP adapter mode_PHP tutorial
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