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<?php |
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/** |
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* Phoole (PHP7.2+) |
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* |
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* @category Library |
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* @package Phoole\Di |
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* @copyright Copyright (c) 2019 Hong Zhang |
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*/ |
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declare(strict_types=1); |
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namespace Phoole\Di; |
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use Psr\Container\ContainerInterface; |
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use Phoole\Di\Exception\RuntimeException; |
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use Phoole\Di\Exception\NotFoundException; |
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/** |
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* Service |
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* |
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* A static service locator build around the `container` |
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* |
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* ```php |
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* // set the container first |
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* Service::setContainer($container); |
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* |
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* // get shared 'db' service |
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* $db = Service::get('db'); |
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* |
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* // get a new 'db' service |
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* $dbNew = Service::get('db@'); |
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* ``` |
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* |
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* @package Phoole\Di |
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*/ |
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class Service |
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{ |
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/** |
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* @var ContainerInterface |
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* @staticvar |
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*/ |
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protected static $container; |
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/** |
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* Finalized constructor to prevent instantiation. |
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* |
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* @access private |
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* @final |
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*/ |
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final private function __construct() |
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{ |
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} |
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/** |
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* Locate a service from the container |
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* |
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* @param string $id service id |
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* @return object |
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* @throws NotFoundException if container not set or object not found |
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* @throws RuntimeException if object instantiation error |
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*/ |
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public static function get(string $id): object |
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{ |
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if (static::$container) { |
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return static::$container->get($id); |
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} |
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throw new RuntimeException(__CLASS__ . ": container not set"); |
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} |
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/** |
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* Set the container |
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* |
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* @param ContainerInterface $container |
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* @return void |
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* @throws RuntimeException if container set already |
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*/ |
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public static function setContainer(ContainerInterface $container = null): void |
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{ |
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if (null === static::$container) { |
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static::$container = $container; |
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} elseif (is_null($container)) { |
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static::$container = null; |
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} else { |
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throw new RuntimeException(__CLASS__ . ": container set already"); |
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} |
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} |
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} |
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phoole /
di
