98 lines
2.8 KiB
PHP
98 lines
2.8 KiB
PHP
<?php
|
|
|
|
/*
|
|
* This file is part of the Symfony package.
|
|
*
|
|
* (c) Fabien Potencier <fabien@symfony.com>
|
|
*
|
|
* For the full copyright and license information, please view the LICENSE
|
|
* file that was distributed with this source code.
|
|
*/
|
|
|
|
namespace Symfony\Contracts\Service;
|
|
|
|
use Psr\Container\ContainerExceptionInterface;
|
|
use Psr\Container\NotFoundExceptionInterface;
|
|
|
|
/**
|
|
* A trait to help implement PSR-11 service locators.
|
|
*
|
|
* @author Robin Chalas <robin.chalas@gmail.com>
|
|
* @author Nicolas Grekas <p@tchwork.com>
|
|
*/
|
|
trait ServiceLocatorTrait
|
|
{
|
|
private $factories;
|
|
private $loading = array();
|
|
|
|
/**
|
|
* @param callable[] $factories
|
|
*/
|
|
public function __construct(array $factories)
|
|
{
|
|
$this->factories = $factories;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function has($id)
|
|
{
|
|
return isset($this->factories[$id]);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function get($id)
|
|
{
|
|
if (!isset($this->factories[$id])) {
|
|
throw $this->createNotFoundException($id);
|
|
}
|
|
|
|
if (isset($this->loading[$id])) {
|
|
$ids = array_values($this->loading);
|
|
$ids = \array_slice($this->loading, array_search($id, $ids));
|
|
$ids[] = $id;
|
|
|
|
throw $this->createCircularReferenceException($id, $ids);
|
|
}
|
|
|
|
$this->loading[$id] = $id;
|
|
try {
|
|
return $this->factories[$id]($this);
|
|
} finally {
|
|
unset($this->loading[$id]);
|
|
}
|
|
}
|
|
|
|
private function createNotFoundException(string $id): NotFoundExceptionInterface
|
|
{
|
|
if (!$alternatives = array_keys($this->factories)) {
|
|
$message = 'is empty...';
|
|
} else {
|
|
$last = array_pop($alternatives);
|
|
if ($alternatives) {
|
|
$message = sprintf('only knows about the "%s" and "%s" services.', implode('", "', $alternatives), $last);
|
|
} else {
|
|
$message = sprintf('only knows about the "%s" service.', $last);
|
|
}
|
|
}
|
|
|
|
if ($this->loading) {
|
|
$message = sprintf('The service "%s" has a dependency on a non-existent service "%s". This locator %s', end($this->loading), $id, $message);
|
|
} else {
|
|
$message = sprintf('Service "%s" not found: the current service locator %s', $id, $message);
|
|
}
|
|
|
|
return new class($message) extends \InvalidArgumentException implements NotFoundExceptionInterface {
|
|
};
|
|
}
|
|
|
|
private function createCircularReferenceException(string $id, array $path): ContainerExceptionInterface
|
|
{
|
|
return new class(sprintf('Circular reference detected for service "%s", path: "%s".', $id, implode(' -> ', $path))) extends \RuntimeException implements ContainerExceptionInterface {
|
|
};
|
|
}
|
|
}
|