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<?php |
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/** |
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* @copyright (C) 2019 pokerapp.cn |
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* @license https://pokerapp.cn/license |
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*/ |
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namespace poker\container; |
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use Closure; |
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use ReflectionClass; |
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use ReflectionMethod; |
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use ReflectionFunction; |
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use ReflectionParameter; |
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use poker\container\traits\ContainerAwareTrait; |
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use poker\container\exceptions\ContainerException; |
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use poker\container\exceptions\UnableToInstantiateException; |
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use poker\container\exceptions\UnableToResolveParameterException; |
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use function is_int; |
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use function vsprintf; |
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use function is_array; |
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use function array_merge; |
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use function array_replace; |
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use function array_values; |
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/** |
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* 控制容器的反转 |
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* |
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* @author Levine <[email protected]> |
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*/ |
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class Container |
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{ |
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/** |
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* 容器自身单例实例 |
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* |
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* @var \poker\container\Container |
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*/ |
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protected static $instance; |
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/** |
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* 注册的类型提示 |
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* |
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* @var array |
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*/ |
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protected $hints = []; |
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/** |
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* 别名 |
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* |
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* @var array |
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*/ |
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protected $aliases = []; |
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/** |
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* 单例实例 |
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* |
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* @var array |
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*/ |
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protected $instances = []; |
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/** |
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* 实例替换程序 |
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* |
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* @var array |
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*/ |
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protected $replacers = []; |
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/** |
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* 上下文依赖关系 |
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* |
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* @var array |
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*/ |
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protected $dependencies = []; |
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/** |
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* 返回容器自身单例实例 |
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* |
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* @return \poker\container\Container |
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*/ |
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public static function getInstance() |
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{ |
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if (null === static::$instance) { |
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static::$instance = new static; |
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} |
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return static::$instance; |
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} |
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/** |
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* 检查是否在容器中注册了类 |
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* |
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* @param string $class 类名 |
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* @return bool |
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*/ |
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public function has(string $class): bool |
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{ |
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$class = $this->resolveAlias($class); |
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return (isset($this->hints[$class]) || isset($this->instances[$class])); |
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} |
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/** |
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* 如果一个类已注册为单例则返回TRUE,否则返回FALSE |
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* |
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* @param string $class 类名 |
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* @return bool |
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*/ |
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public function isSingleton(string $class): bool |
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{ |
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$class = $this->resolveAlias($class); |
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return isset($this->instances[$class]) || (isset($this->hints[$class]) && $this->hints[$class]['singleton'] === true); |
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} |
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/** |
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* 即使该类已注册为单例,也返回一个新的类实例 |
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* |
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* @param string $class 类名 |
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* @param array $parameters 构造函数参数 |
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* @return object |
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*/ |
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public function getFresh(string $class, array $parameters = []): object |
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{ |
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return $this->get($class, $parameters, false); |
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} |
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/** |
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* 注册一个类型提示 |
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* |
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* @param string|array $hint 包含类型提示和别名的类型提示或数组 |
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* @param string|\Closure $class 类名或闭包 |
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* @param bool $singleton 是否每次都应该返回相同的实例 |
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*/ |
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public function register($hint, $class, bool $singleton = false): void |
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{ |
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$this->hints[$this->parseHint($hint)] = ['class' => $class, 'singleton' => $singleton]; |
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} |
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/** |
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* 注册一个类型提示并每次返回相同的实例 |
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* |
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* @param string|array $hint 包含类型提示和别名的类型提示或数组 |
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* @param string|\Closure $class 类名或闭包 |
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*/ |
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public function registerSingleton($hint, $class): void |
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{ |
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$this->register($hint, $class, true); |
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} |
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/** |
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* 注册一个单例实例 |
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* |
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* @param string|array $hint 包含类型提示和别名的类型提示或数组 |
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* @param object $instance 类实例 |
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*/ |
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public function registerInstance($hint, object $instance): void |
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{ |
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$this->instances[$this->parseHint($hint)] = $instance; |
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} |
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/** |
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* 替换一个已注册的类型提示 |
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* |
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* @param string $hint 类型提示 |
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* @param string|\Closure $class 类名或闭包 |
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* @param bool $singleton 是否替换一个单例 |
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* @throws \poker\container\exceptions\ContainerException |
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*/ |
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public function replace(string $hint, $class, bool $singleton = false): void |
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{ |
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$hint = $this->resolveAlias($hint); |
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if (!isset($this->hints[$hint])) { |
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throw new ContainerException(vsprintf('Unable to replace [ %s ] as it hasn\'t been registered.', [$hint])); |
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} |
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$this->hints[$hint]['class'] = $class; |
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if ($singleton) { |
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unset($this->instances[$hint]); |
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} |
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$this->replaceInstances($hint); |
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} |
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/** |
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* 注册替换程序 |
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* |
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* @param string $hint 类型提示 |
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* @param callable $replacer 实例替换程序 |
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* @param string|null $eventName 事件名称 |
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*/ |
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public function onReplace(string $hint, callable $replacer, ?string $eventName = null): void |
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{ |
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$hint = $this->resolveAlias($hint); |
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$eventName === null ? ($this->replacers[$hint][] = $replacer) : ($this->replacers[$hint][$eventName] = $replacer); |
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} |
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/** |
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* 替换一个已注册的单例类型提示 |
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* |
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* @param string $hint 类型提示 |
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* @param string|\Closure $class 类名或闭包 |
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*/ |
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public function replaceSingleton(string $hint, $class): void |
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{ |
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$this->replace($hint, $class, true); |
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} |
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/** |
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* 替换一个单例实例 |
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* |
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* @param string $hint 类型提示 |
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* @param object $instance 类实例 |
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* @throws \poker\container\exceptions\ContainerException |
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*/ |
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public function replaceInstance(string $hint, object $instance): void |
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{ |
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$hint = $this->resolveAlias($hint); |
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if (!isset($this->instances[$hint])) { |
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throw new ContainerException(vsprintf('Unable to replace [ %s ] as it hasn\'t been registered.', [$hint])); |
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} |
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$this->instances[$hint] = $instance; |
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$this->replaceInstances($hint); |
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} |
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/** |
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* 注册一个上下文依赖关系 |
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* |
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* @param string $class 类 |
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* @param string $interface 接口 |
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* @param string $implementation 实现 |
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*/ |
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public function registerContextualDependency(string $class, string $interface, string $implementation): void |
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{ |
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$this->dependencies[$class][$interface] = $implementation; |
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} |
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/** |
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* 返回一个类实例 |
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* |
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* @param string $class 类名 |
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* @param array $parameters 构造函数参数 |
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* @param bool $reuseInstance 是否重用现有实例 |
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* @return object |
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*/ |
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public function get(string $class, array $parameters = [], bool $reuseInstance = true): object |
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{ |
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$class = $this->resolveAlias($class); |
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// 如果存在单例实例,直接返回它 |
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if ($reuseInstance && isset($this->instances[$class])) { |
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return $this->instances[$class]; |
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} |
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// 创建新实例 |
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$instance = $this->factory($this->resolveHint($class), $parameters); |
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// 如果实例注册为单例,则存储该实例 |
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if ($reuseInstance && isset($this->hints[$class]) && $this->hints[$class]['singleton']) { |
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$this->instances[$class] = $instance; |
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} |
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// 返回的实例 |
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return $instance; |
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} |
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/** |
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* 工厂创建一个类实例 |
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* |
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* @param string|\Closure $class 类名或闭包 |
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* @param array $parameters 构造函数参数 |
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* @return object |
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*/ |
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public function factory($class, array $parameters = []): object |
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{ |
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// 实例化类 |
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if ($class instanceof Closure) { |
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$instance = $this->closureFactory($class, $parameters); |
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} else { |
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$instance = $this->reflectionFactory($class, $parameters); |
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} |
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// 如果类可以识别容器,则使用setter注入容器 |
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if ($this->isContainerAware($instance)) { |
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$instance->setContainer($this); |
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} |
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// 返回的实例 |
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return $instance; |
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} |
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/** |
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* 执行可调用并注入其依赖项 |
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* |
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* @param callable $callable 可调用 |
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* @param array $parameters 参数 |
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* @return mixed |
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*/ |
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public function call(callable $callable, array $parameters = []) |
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{ |
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if (is_array($callable)) { |
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$reflection = new ReflectionMethod($callable[0], $callable[1]); |
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} else { |
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$reflection = new ReflectionFunction($callable); |
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} |
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return $callable(...$this->resolveParameters($reflection->getParameters(), $parameters)); |
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} |
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/** |
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315
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* 使用工厂闭包创建一个类实例 |
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* |
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* @param \Closure $factory 类名或闭包 |
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318
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* @param array $parameters 构造函数参数 |
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* @return object |
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*/ |
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protected function closureFactory(Closure $factory, array $parameters): object |
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{ |
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// 将容器作为第一个参数传递,然后传递所提供的参数 |
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return $factory(...array_merge([$this], $parameters)); |
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} |
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326
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327
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/** |
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328
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* 使用反射创建一个类实例 |
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329
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* |
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330
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* @param string $class 类名 |
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331
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* @param array $parameters 构造函数参数 |
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332
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* @throws \poker\container\exceptions\UnableToInstantiateException |
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333
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* @return object |
|
334
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|
*/ |
|
335
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protected function reflectionFactory(string $class, array $parameters): object |
|
336
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{ |
|
337
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$class = new ReflectionClass($class); |
|
338
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|
339
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|
// 检查是否可以实例化该类 |
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340
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if (!$class->isInstantiable()) { |
|
341
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throw new UnableToInstantiateException(vsprintf('Unable to create a [ %s ] instance.', [$class->getName()])); |
|
342
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} |
|
343
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344
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// 获取类的构造函数 |
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345
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$constructor = $class->getConstructor(); |
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346
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|
|
347
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// 如果没有构造函数,只返回一个新实例 |
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348
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|
if ($constructor === null) { |
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349
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return $class->newInstance(); |
|
350
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|
} |
|
351
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|
352
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|
// 该类有一个构造函数,因此将使用解析的参数返回一个新实例 |
|
353
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return $class->newInstanceArgs($this->resolveParameters($constructor->getParameters(), $parameters, $class)); |
|
354
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|
} |
|
355
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|
356
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|
/** |
|
357
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|
* 检查类是否可识别容器 |
|
358
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|
* |
|
359
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|
* @param object $class 类实例 |
|
360
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|
* @return bool |
|
361
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|
*/ |
|
362
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|
protected function isContainerAware(object $class): bool |
|
363
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|
|
{ |
|
364
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|
|
$traits = ClassInspector::getTraits($class); |
|
365
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|
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|
|
366
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|
|
return isset($traits[ContainerAwareTrait::class]); |
|
367
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|
} |
|
368
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|
|
369
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|
/** |
|
370
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|
* 解析一个类型提示 |
|
371
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|
|
* |
|
372
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|
|
* @param string $hint 类型提示 |
|
373
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|
|
* @return string|\Closure |
|
374
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|
|
*/ |
|
375
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|
|
protected function resolveHint(string $hint) |
|
376
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|
|
{ |
|
377
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|
|
return $this->hints[$hint]['class'] ?? $hint; |
|
378
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|
|
} |
|
379
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|
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|
|
380
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|
|
/** |
|
381
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|
* 根据别名返回名称。如果不存在别名只返回收到的值 |
|
382
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|
|
* |
|
383
|
|
|
* @param string $alias 别名 |
|
384
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|
|
* @return string |
|
385
|
|
|
*/ |
|
386
|
|
|
protected function resolveAlias(string $alias): string |
|
387
|
|
|
{ |
|
388
|
|
|
return $this->aliases[$alias] ?? $alias; |
|
389
|
|
|
} |
|
390
|
|
|
|
|
391
|
|
|
/** |
|
392
|
|
|
* 解析一个上下文依赖关系 |
|
393
|
|
|
* |
|
394
|
|
|
* @param string $class 类 |
|
395
|
|
|
* @param string $interface 接口 |
|
396
|
|
|
* @return string |
|
397
|
|
|
*/ |
|
398
|
|
|
protected function resolveContextualDependency(string $class, string $interface): string |
|
399
|
|
|
{ |
|
400
|
|
|
return $this->dependencies[$class][$interface] ?? $interface; |
|
401
|
|
|
} |
|
402
|
|
|
|
|
403
|
|
|
/** |
|
404
|
|
|
* 解析提示参数 |
|
405
|
|
|
* |
|
406
|
|
|
* @param string|array $hint 包含类型提示和别名的类型提示或数组 |
|
407
|
|
|
* @return string |
|
408
|
|
|
*/ |
|
409
|
|
|
protected function parseHint($hint): string |
|
410
|
|
|
{ |
|
411
|
|
|
if (is_array($hint)) { |
|
412
|
|
|
[$hint, $alias] = $hint; |
|
413
|
|
|
|
|
414
|
|
|
$this->aliases[$alias] = $hint; |
|
415
|
|
|
} |
|
416
|
|
|
|
|
417
|
|
|
return $hint; |
|
418
|
|
|
} |
|
419
|
|
|
|
|
420
|
|
|
/** |
|
421
|
|
|
* 解析一个参数 |
|
422
|
|
|
* |
|
423
|
|
|
* @param \ReflectionParameter $parameter 反射参数实例 |
|
424
|
|
|
* @param \ReflectionClass|null $class 反射类实例 |
|
425
|
|
|
* @throws \poker\container\exceptions\UnableToInstantiateException |
|
426
|
|
|
* @throws \poker\container\exceptions\UnableToResolveParameterException |
|
427
|
|
|
* @return mixed |
|
428
|
|
|
*/ |
|
429
|
|
|
protected function resolveParameter(ReflectionParameter $parameter, ?ReflectionClass $class = null) |
|
430
|
|
|
{ |
|
431
|
|
|
// 如果参数是类实例,将尝试使用容器解析它 |
|
432
|
|
|
if (($parameterClass = $parameter->getClass()) !== null) { |
|
433
|
|
|
$parameterClassName = $parameterClass->getName(); |
|
434
|
|
|
|
|
435
|
|
|
if ($class !== null) { |
|
436
|
|
|
$parameterClassName = $this->resolveContextualDependency($class->getName(), $parameterClassName); |
|
437
|
|
|
} |
|
438
|
|
|
|
|
439
|
|
|
try { |
|
440
|
|
|
return $this->get($parameterClassName); |
|
441
|
|
|
} catch(UnableToInstantiateException | UnableToResolveParameterException $e) { |
|
442
|
|
|
if ($parameter->allowsNull()) { |
|
443
|
|
|
return null; |
|
444
|
|
|
} |
|
445
|
|
|
|
|
446
|
|
|
throw $e; |
|
447
|
|
|
} |
|
448
|
|
|
} |
|
449
|
|
|
|
|
450
|
|
|
// 如果参数有一个默认值,将使直接使用它 |
|
451
|
|
|
if ($parameter->isDefaultValueAvailable()) { |
|
452
|
|
|
return $parameter->getDefaultValue(); |
|
453
|
|
|
} |
|
454
|
|
|
|
|
455
|
|
|
// 该参数可以为空,因此只返回null |
|
456
|
|
|
if ($parameter->hasType() && $parameter->allowsNull()) { |
|
457
|
|
|
return null; |
|
458
|
|
|
} |
|
459
|
|
|
|
|
460
|
|
|
// 如果上述条件都不成立,则抛出异常消息 |
|
461
|
|
|
throw new UnableToResolveParameterException(vsprintf('Unable to resolve the [ $%s ] parameter of [ %s ].', [$parameter->getName(), $this->getDeclaringFunction($parameter)])); |
|
462
|
|
|
} |
|
463
|
|
|
|
|
464
|
|
|
/** |
|
465
|
|
|
* 解析多个参数 |
|
466
|
|
|
* |
|
467
|
|
|
* @param array $reflectionParameters 反射参数 |
|
468
|
|
|
* @param array $providedParameters 提供的参数 |
|
469
|
|
|
* @param \ReflectionClass|null $class 反射类实例 |
|
470
|
|
|
* @return array |
|
471
|
|
|
*/ |
|
472
|
|
|
protected function resolveParameters(array $reflectionParameters, array $providedParameters, ?ReflectionClass $class = null): array |
|
473
|
|
|
{ |
|
474
|
|
|
if (empty($reflectionParameters)) { |
|
475
|
|
|
return array_values($providedParameters); |
|
476
|
|
|
} |
|
477
|
|
|
|
|
478
|
|
|
// 将提供的参数与使用反射得到的参数合并 |
|
479
|
|
|
$parameters = $this->mergeParameters($reflectionParameters, $providedParameters); |
|
480
|
|
|
|
|
481
|
|
|
// 循环遍历参数并处理需要解析的参数 |
|
482
|
|
|
foreach ($parameters as $key => $parameter) { |
|
483
|
|
|
if ($parameter instanceof ReflectionParameter) { |
|
484
|
|
|
$parameters[$key] = $this->resolveParameter($parameter, $class); |
|
485
|
|
|
} |
|
486
|
|
|
} |
|
487
|
|
|
|
|
488
|
|
|
// 返回解析的参数 |
|
489
|
|
|
return array_values($parameters); |
|
490
|
|
|
} |
|
491
|
|
|
|
|
492
|
|
|
/** |
|
493
|
|
|
* 将提供的参数与反射参数合并 |
|
494
|
|
|
* |
|
495
|
|
|
* @param array $reflectionParameters 反射参数 |
|
496
|
|
|
* @param array $providedParameters 提供的参数 |
|
497
|
|
|
* @return array |
|
498
|
|
|
*/ |
|
499
|
|
|
protected function mergeParameters(array $reflectionParameters, array $providedParameters): array |
|
500
|
|
|
{ |
|
501
|
|
|
// 使反射参数数组关联 |
|
502
|
|
|
$associativeReflectionParameters = []; |
|
503
|
|
|
foreach ($reflectionParameters as $value) { |
|
504
|
|
|
$associativeReflectionParameters[$value->getName()] = $value; |
|
505
|
|
|
} |
|
506
|
|
|
|
|
507
|
|
|
// 使提供的参数数组关联 |
|
508
|
|
|
$associativeProvidedParameters = []; |
|
509
|
|
|
foreach ($providedParameters as $key => $value) { |
|
510
|
|
|
if (is_int($key)) { |
|
511
|
|
|
$associativeProvidedParameters[$reflectionParameters[$key]->getName()] = $value; |
|
512
|
|
|
} else { |
|
513
|
|
|
$associativeProvidedParameters[$key] = $value; |
|
514
|
|
|
} |
|
515
|
|
|
} |
|
516
|
|
|
|
|
517
|
|
|
// 返回合并后的参数 |
|
518
|
|
|
return array_replace($associativeReflectionParameters, $associativeProvidedParameters); |
|
519
|
|
|
} |
|
520
|
|
|
|
|
521
|
|
|
/** |
|
522
|
|
|
* 返回声明函数的名称 |
|
523
|
|
|
* |
|
524
|
|
|
* @param \ReflectionParameter $parameter 反射参数实例 |
|
525
|
|
|
* @return string |
|
526
|
|
|
*/ |
|
527
|
|
|
protected function getDeclaringFunction(ReflectionParameter $parameter): string |
|
528
|
|
|
{ |
|
529
|
|
|
$declaringFunction = $parameter->getDeclaringFunction(); |
|
530
|
|
|
|
|
531
|
|
|
if ($declaringFunction->isClosure()) { |
|
532
|
|
|
return 'Closure'; |
|
533
|
|
|
} |
|
534
|
|
|
|
|
535
|
|
|
if (($class = $parameter->getDeclaringClass()) === null) { |
|
536
|
|
|
return $declaringFunction->getName(); |
|
537
|
|
|
} |
|
538
|
|
|
|
|
539
|
|
|
return $class->getName() . '::' . $declaringFunction->getName(); |
|
540
|
|
|
} |
|
541
|
|
|
|
|
542
|
|
|
/** |
|
543
|
|
|
* 替换以前解析的实例 |
|
544
|
|
|
* |
|
545
|
|
|
* @param string $hint 类型提示 |
|
546
|
|
|
*/ |
|
547
|
|
|
protected function replaceInstances(string $hint): void |
|
548
|
|
|
{ |
|
549
|
|
|
if (isset($this->replacers[$hint])) { |
|
550
|
|
|
$instance = $this->get($hint); |
|
551
|
|
|
|
|
552
|
|
|
foreach ($this->replacers[$hint] as $replacer) { |
|
553
|
|
|
$replacer($instance); |
|
554
|
|
|
} |
|
555
|
|
|
} |
|
556
|
|
|
} |
|
557
|
|
|
} |
|
558
|
|
|
|