Laravel 서비스 컨테이너 인스턴스 튜토리얼: 제어 반전(IoC) 및 종속성 주입(DI)에 대한 심층적인 이해

class Superman {}

class Power {
   /**
    * 能力值
    */
   protected $ability;

   /**
    * 能力范围或距离
    */
   protected $range;

   public function __construct($ability, $range)
   {
       $this->ability = $ability;
       $this->range = $range;
   }
}

class Superman
{
   protected $power;

   public function __construct()
   {
       $this->power = new Power(999, 100);
   }
}

class Flight
{
   protected $speed;
   protected $holdtime;
   public function __construct($speed, $holdtime) {}
}

class Force
{
   protected $force;
   public function __construct($force) {}
}

class Shot
{
   protected $atk;
   protected $range;
   protected $limit;
   public function __construct($atk, $range, $limit) {}
}

class SuperModuleFactory
{
   public function makeModule($moduleName, $options)
   {
       switch ($moduleName) {
           case 'Fight': 
               return new Fight($options[0], $options[1]);
           case 'Force': 
               return new Force($options[0]);
           case 'Shot': 
               return new Shot($options[0], $options[1], $options[2]);
       }
   }
}

class Superman
{
   protected $power;

   public function __construct()
   {
       // 初始化工厂
       $factory = new SuperModuleFactory;

       // 通过工厂提供的方法制造需要的模块
       $this->power = $factory->makeModule('Fight', [9, 100]);
       // $this->power = $factory->makeModule('Force', [45]);
       // $this->power = $factory->makeModule('Shot', [99, 50, 2]);
       /*
       $this->power = array(
           $factory->makeModule('Force', [45]),
           $factory->makeModule('Shot', [99, 50, 2])
       );
       */
   }
}

class Superman
{
   protected $power;

   public function __construct(array $modules)
   {
       // 初始化工厂
       $factory = new SuperModuleFactory;

       // 通过工厂提供的方法制造需要的模块
       foreach ($modules as $moduleName => $moduleOptions) {
           $this->power[] = $factory->makeModule($moduleName, $moduleOptions);
       }
   }
}

// 创建超人
$superman = new Superman([
   'Fight' => [9, 100],
   'Shot' => [99, 50, 2]
]);

class SuperModuleFactory
{
   public function makeModule($moduleName, $options)
   {
       switch ($moduleName) {
           case 'Fight': 
               return new Fight($options[0], $options[1]);
           case 'Force': 
               return new Force($options[0]);
           case 'Shot': 
               return new Shot($options[0], $options[1], $options[2]);
           // case 'more': .......
           // case 'and more': .......
           // case 'and more': .......
           // case 'oh no! its too many!': .......
       }
   }
}

interface SuperModuleInterface
{
   /**
    * 超能力激活方法
    *
    * 任何一个超能力都得有该方法，并拥有一个参数
    *@param array $target 针对目标，可以是一个或多个，自己或他人
    */
   public function activate(array $target);
}

/**
* X-超能量
*/
class XPower implements SuperModuleInterface
{
   public function activate(array $target)
   {
       // 这只是个例子。。具体自行脑补
   }
}

/**
* 终极* （就这么俗）
*/
class UltraBomb implements SuperModuleInterface
{
   public function activate(array $target)
   {
       // 这只是个例子。。具体自行脑补
   }
}

class Superman
{
   protected $module;

   public function __construct(SuperModuleInterface $module)
   {
       $this->module = $module;
   }
}

// 超能力模组
$superModule = new XPower;
// 初始化一个超人，并注入一个超能力模组依赖
$superMan = new Superman($superModule);

$superModule = new XPower;
$superMan = new Superman($superModule);

class Container
{
   protected $binds;

   protected $instances;

   public function bind($abstract, $concrete)
   {
       if ($concrete instanceof Closure) {
           $this->binds[$abstract] = $concrete;
       } else {
           $this->instances[$abstract] = $concrete;
       }
   }

   public function make($abstract, $parameters = [])
   {
       if (isset($this->instances[$abstract])) {
           return $this->instances[$abstract];
       }

       array_unshift($parameters, $this);

       return call_user_func_array($this->binds[$abstract], $parameters);
   }
}

// 创建一个容器（后面称作超级工厂）
$container = new Container;

// 向该 超级工厂添加超人的生产脚本
$container->bind('superman', function($container, $moduleName) {
   return new Superman($container->make($moduleName));
});

// 向该 超级工厂添加超能力模组的生产脚本
$container->bind('xpower', function($container) {
   return new XPower;
});

// 同上
$container->bind('ultrabomb', function($container) {
   return new UltraBomb;
});

// ****************** 华丽丽的分割线 **********************
// 开始启动生产
$superman_1 = $container->make('superman', 'xpower');
$superman_2 = $container->make('superman', 'ultrabomb');
$superman_3 = $container->make('superman', 'xpower');
// ...随意添加

Route::get('/', function() {
   // bla bla bla...
});

<?php 
   namespace Illuminate\Support\Facades;

   /**
    * @see \Illuminate\Routing\Router
    */
   class Route extends Facade {

       /**
        * Get the registered name of the component.
        *
        * @return string
        */
       protected static function getFacadeAccessor()
       {
           return &#39;router&#39;;
       }

}