Container::invokeClass() - Code Metrics - Inspection of "改进Container的getInstance方法" - top-think/framework - Measure and Improve Code Quality continuously with Scrutinizer

Passed
Pull Request — 6.0 (#1750)

by guanguans
created 2019-04-10 09:19 UTC
Container::invokeClass() A

↳ Parent: Container
Complexity

Conditions	6
Paths	19
Size

Total Lines	21
Code Lines	12
Duplication

Lines	0
Ratio	0 %
Code Coverage

Tests	12
CRAP Score	6
Importance

Changes
Metric	Value
cc	6
eloc	12
nc	19
nop	2
dl	0
loc	21
ccs	12
cts	12
cp	1
crap	6
rs	9.2222
c	0
b	0
f	0
<?php
// +----------------------------------------------------------------------

// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2019 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <[email protected]>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think;

use ArrayAccess;
use ArrayIterator;
use Closure;
use Countable;
use InvalidArgumentException;
use IteratorAggregate;
use Psr\Container\ContainerInterface;
use ReflectionClass;
use ReflectionException;
use ReflectionFunction;
use ReflectionMethod;
use think\exception\ClassNotFoundException;

/**
 * Class Container
 * @package think

 *
 * @property Route      $route
 * @property Config     $config
 * @property Cache      $cache
 * @property Request    $request
 * @property Http       $http
 * @property Console    $console
 * @property Env        $env
 * @property Debug      $debug
 * @property Event      $event
 * @property Middleware $middleware
 * @property Log        $log
 * @property Lang       $lang
 * @property Db         $db
 * @property Cookie     $cookie
 * @property Session    $session
 * @property Validate   $validate
 */

class Container implements ContainerInterface, ArrayAccess, IteratorAggregate, Countable
{
    /**
     * 容器对象实例
     * @var Container|Closure
     */
    protected static $instance;

    /**
     * 容器中的对象实例
     * @var array
     */
    protected $instances = [];

    /**
     * 容器绑定标识
     * @var array
     */
    protected $bind = [
        'app'                     => App::class,
        'cache'                   => Cache::class,
        'config'                  => Config::class,
        'console'                 => Console::class,
        'cookie'                  => Cookie::class,
        'db'                      => Db::class,
        'debug'                   => Debug::class,
        'env'                     => Env::class,
        'event'                   => Event::class,
        'http'                    => Http::class,
        'lang'                    => Lang::class,
        'log'                     => Log::class,
        'middleware'              => Middleware::class,
        'request'                 => Request::class,
        'response'                => Response::class,
        'route'                   => Route::class,
        'session'                 => Session::class,
        'validate'                => Validate::class,
        'view'                    => View::class,

        // 接口依赖注入
        'Psr\Log\LoggerInterface' => Log::class,
    ];

    /**
     * 获取当前容器的实例（单例）
     * @access public
     * @return static
     */
    public static function getInstance()
    {
        if (static::$instance === null) {
            static::$instance = new static;
        }

        if (static::$instance instanceof Closure) {
            return (static::$instance)();
        }

        return static::$instance;
    }

    /**
     * 设置当前容器的实例
     * @access public
     * @param object|Closure $instance

     * @return void
     */
    public static function setInstance($instance): void
    {
        static::$instance = $instance;
    }

    /**
     * 获取容器中的对象实例 不存在则创建
     * @access public
     * @param string     $abstract    类名或者标识

     * @param array|true $vars        变量

     * @param bool       $newInstance 是否每次创建新的实例

     * @return object
     */
    public static function pull(string $abstract, array $vars = [], bool $newInstance = false)
    {
        return static::getInstance()->make($abstract, $vars, $newInstance);
    }

    /**
     * 获取容器中的对象实例
     * @access public
     * @param string $abstract 类名或者标识

     * @return object
     */
    public function get($abstract)
    {
        if ($this->has($abstract)) {
            return $this->make($abstract);
        }

        throw new ClassNotFoundException('class not exists: ' . $abstract, $abstract);
    }

    /**
     * 绑定一个类、闭包、实例、接口实现到容器
     * @access public
     * @param string|array $abstract 类标识、接口

     * @param mixed        $concrete 要绑定的类、闭包或者实例

     * @return $this
     */
    public function bind($abstract, $concrete = null)
    {
        if (is_array($abstract)) {
            $this->bind = array_merge($this->bind, $abstract);
        } elseif ($concrete instanceof Closure) {
            $this->bind[$abstract] = $concrete;
        } elseif (is_object($concrete)) {
            $this->instance($abstract, $concrete);
        } else {
            $this->bind[$abstract] = $concrete;
        }

        return $this;
    }

    /**
     * 绑定一个类实例到容器
     * @access public
     * @param string $abstract 类名或者标识

     * @param object $instance 类的实例

     * @return $this
     */
    public function instance(string $abstract, $instance)
    {
        if (isset($this->bind[$abstract])) {
            $bind = $this->bind[$abstract];

            if (is_string($bind)) {
                return $this->instance($bind, $instance);
            }
        }

        $this->instances[$abstract] = $instance;

        return $this;
    }

    /**
     * 判断容器中是否存在类及标识
     * @access public
     * @param string $abstract 类名或者标识

     * @return bool
     */
    public function bound(string $abstract): bool
    {
        return isset($this->bind[$abstract]) || isset($this->instances[$abstract]);
    }

    /**
     * 判断容器中是否存在类及标识
     * @access public
     * @param string $name 类名或者标识

     * @return bool
     */
    public function has($name): bool
    {
        return $this->bound($name);
    }

    /**
     * 判断容器中是否存在对象实例
     * @access public
     * @param string $abstract 类名或者标识

     * @return bool
     */
    public function exists(string $abstract): bool
    {
        if (isset($this->bind[$abstract])) {
            $bind = $this->bind[$abstract];

            if (is_string($bind)) {
                return $this->exists($bind);
            }
        }

        return isset($this->instances[$abstract]);
    }

    /**
     * 创建类的实例 已经存在则直接获取
     * @access public
     * @param string $abstract    类名或者标识

     * @param array  $vars        变量

     * @param bool   $newInstance 是否每次创建新的实例

     * @return mixed
     */
    public function make(string $abstract, array $vars = [], bool $newInstance = false)
    {
        if (isset($this->instances[$abstract]) && !$newInstance) {
            return $this->instances[$abstract];
        }

        if (isset($this->bind[$abstract])) {
            $concrete = $this->bind[$abstract];

            if ($concrete instanceof Closure) {
                $object = $this->invokeFunction($concrete, $vars);
            } else {
                return $this->make($concrete, $vars, $newInstance);
            }
        } else {
            $object = $this->invokeClass($abstract, $vars);
        }

        if (!$newInstance) {
            $this->instances[$abstract] = $object;
        }

        return $object;
    }

    /**
     * 删除容器中的对象实例
     * @access public
     * @param string $name 类名或者标识

     * @return void
     */
    public function delete($name)
    {
        if (isset($this->bind[$name])) {
            $bind = $this->bind[$name];

            if (is_string($bind)) {
                return $this->delete($bind);
class A
{
    function getObject()
    {
        return null;
    }

}

$a = new A();
if ($a->getObject()) {
            }
        }

        if (isset($this->instances[$name])) {
            unset($this->instances[$name]);
        }
    }

    /**
     * 执行函数或者闭包方法 支持参数调用
     * @access public
     * @param mixed $function 函数或者闭包

     * @param array $vars     参数

     * @return mixed
     */
    public function invokeFunction($function, array $vars = [])
    {
        try {
            $reflect = new ReflectionFunction($function);

            $args = $this->bindParams($reflect, $vars);

            return call_user_func_array($function, $args);
        } catch (ReflectionException $e) {
            throw new Exception('function not exists: ' . $function . '()');
        }
    }

    /**
     * 调用反射执行类的方法 支持参数绑定
     * @access public
     * @param mixed $method 方法

     * @param array $vars   参数

     * @return mixed
     */
    public function invokeMethod($method, array $vars = [])
    {
        try {
            if (is_array($method)) {
                $class   = is_object($method[0]) ? $method[0] : $this->invokeClass($method[0]);
                $reflect = new ReflectionMethod($class, $method[1]);
            } else {
                // 静态方法
                $reflect = new ReflectionMethod($method);
                $reflect = /** @scrutinizer ignore-call */ new ReflectionMethod($method);
            }

            $args = $this->bindParams($reflect, $vars);

            return $reflect->invokeArgs($class ?? null, $args);
        } catch (ReflectionException $e) {
            if (is_array($method)) {
                $class    = is_object($method[0]) ? get_class($method[0]) : $method[0];

                $callback = $class . '::' . $method[1];
            } else {
                $callback = $method;
            }

            throw new Exception('method not exists: ' . $callback . '()');
        }
    }

    /**
     * 调用反射执行类的方法 支持参数绑定
     * @access public
     * @param object $instance 对象实例

     * @param mixed  $reflect  反射类

     * @param array  $vars     参数

     * @return mixed
     */
    public function invokeReflectMethod($instance, $reflect, array $vars = [])
    {
        $args = $this->bindParams($reflect, $vars);

        return $reflect->invokeArgs($instance, $args);
    }

    /**
     * 调用反射执行callable 支持参数绑定
     * @access public
     * @param mixed $callable

     * @param array $vars 参数

     * @return mixed
     */
    public function invoke($callable, array $vars = [])
    {
        if ($callable instanceof Closure) {
            return $this->invokeFunction($callable, $vars);
        }

        return $this->invokeMethod($callable, $vars);
    }

    /**
     * 调用反射执行类的实例化 支持依赖注入
     * @access public
     * @param string $class 类名

     * @param array  $vars  参数

     * @return mixed
     */
    public function invokeClass(string $class, array $vars = [])
    {
        try {
            $reflect = new ReflectionClass($class);

            if ($reflect->hasMethod('__make')) {
                $method = new ReflectionMethod($class, '__make');

                if ($method->isPublic() && $method->isStatic()) {
                    $args = $this->bindParams($method, $vars);
                    return $method->invokeArgs(null, $args);
                }
            }

            $constructor = $reflect->getConstructor();

            $args = $constructor ? $this->bindParams($constructor, $vars) : [];


            return $reflect->newInstanceArgs($args);
        } catch (ReflectionException $e) {
            throw new ClassNotFoundException('class not exists: ' . $class, $class);
        }
    }

    /**
     * 绑定参数
     * @access protected
     * @param \ReflectionMethod|\ReflectionFunction $reflect 反射类

     * @param array                                 $vars    参数

     * @return array
     */
    protected function bindParams($reflect, array $vars = []): array
    {
        if ($reflect->getNumberOfParameters() == 0) {
            return [];
        }

        // 判断数组类型 数字数组时按顺序绑定参数
        reset($vars);
        $type   = key($vars) === 0 ? 1 : 0;
        $params = $reflect->getParameters();
        $args   = [];

        foreach ($params as $param) {
            $name      = $param->getName();
            $lowerName = App::parseName($name);
            $class     = $param->getClass();

            if ($class) {
                $args[] = $this->getObjectParam($class->getName(), $vars);
            } elseif (1 == $type && !empty($vars)) {
                $args[] = array_shift($vars);
            } elseif (0 == $type && isset($vars[$name])) {
                $args[] = $vars[$name];
            } elseif (0 == $type && isset($vars[$lowerName])) {
                $args[] = $vars[$lowerName];
            } elseif ($param->isDefaultValueAvailable()) {
                $args[] = $param->getDefaultValue();
            } else {
                throw new InvalidArgumentException('method param miss:' . $name);
            }
        }

        return $args;
    }

    /**
     * 获取对象类型的参数值
     * @access protected
     * @param string $className 类名

     * @param array  $vars      参数

     * @return mixed
     */
    protected function getObjectParam(string $className, array &$vars)
    {
        $array = $vars;
        $value = array_shift($array);

        if ($value instanceof $className) {
            $result = $value;
            array_shift($vars);
        } else {
            $result = $this->make($className);
        }

        return $result;
    }

    public function __set($name, $value)

    {
        $this->bind($name, $value);
    }

    public function __get($name)

    {
        return $this->get($name);
    }

    public function __isset($name): bool

    {
        return $this->exists($name);
    }

    public function __unset($name)

    {
        $this->delete($name);
    }

    public function offsetExists($key)

    {
        return $this->exists($key);
    }

    public function offsetGet($key)

    {
        return $this->make($key);
    }

    public function offsetSet($key, $value)

    {
        $this->bind($key, $value);
    }

    public function offsetUnset($key)

    {
        $this->delete($key);
    }

    //Countable
    public function count()

    {
        return count($this->instances);
    }

    //IteratorAggregate
    public function getIterator()

    {
        return new ArrayIterator($this->instances);
    }
}

top-think / framework

Pull Request — 6.0 (#1750)

Container::invokeClass() A

Complexity

Size

Duplication

Code Coverage

Importance

Duplication Side-by-Side

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