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- <?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\Component\DependencyInjection;
- use Psr\Container\ContainerExceptionInterface;
- use Psr\Container\NotFoundExceptionInterface;
- use Symfony\Component\DependencyInjection\Exception\RuntimeException;
- use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
- use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
- use Symfony\Contracts\Service\ServiceLocatorTrait;
- use Symfony\Contracts\Service\ServiceProviderInterface;
- use Symfony\Contracts\Service\ServiceSubscriberInterface;
- /**
- * @author Robin Chalas <robin.chalas@gmail.com>
- * @author Nicolas Grekas <p@tchwork.com>
- */
- class ServiceLocator implements ServiceProviderInterface
- {
- use ServiceLocatorTrait {
- get as private doGet;
- }
- private $externalId;
- private $container;
- /**
- * {@inheritdoc}
- *
- * @return mixed
- */
- public function get($id)
- {
- if (!$this->externalId) {
- return $this->doGet($id);
- }
- try {
- return $this->doGet($id);
- } catch (RuntimeException $e) {
- $what = sprintf('service "%s" required by "%s"', $id, $this->externalId);
- $message = preg_replace('/service "\.service_locator\.[^"]++"/', $what, $e->getMessage());
- if ($e->getMessage() === $message) {
- $message = sprintf('Cannot resolve %s: %s', $what, $message);
- }
- $r = new \ReflectionProperty($e, 'message');
- $r->setAccessible(true);
- $r->setValue($e, $message);
- throw $e;
- }
- }
- public function __invoke(string $id)
- {
- return isset($this->factories[$id]) ? $this->get($id) : null;
- }
- /**
- * @internal
- *
- * @return static
- */
- public function withContext(string $externalId, Container $container): self
- {
- $locator = clone $this;
- $locator->externalId = $externalId;
- $locator->container = $container;
- return $locator;
- }
- private function createNotFoundException(string $id): NotFoundExceptionInterface
- {
- if ($this->loading) {
- $msg = sprintf('The service "%s" has a dependency on a non-existent service "%s". This locator %s', end($this->loading), $id, $this->formatAlternatives());
- return new ServiceNotFoundException($id, end($this->loading) ?: null, null, [], $msg);
- }
- $class = debug_backtrace(\DEBUG_BACKTRACE_PROVIDE_OBJECT | \DEBUG_BACKTRACE_IGNORE_ARGS, 4);
- $class = isset($class[3]['object']) ? \get_class($class[3]['object']) : null;
- $externalId = $this->externalId ?: $class;
- $msg = [];
- $msg[] = sprintf('Service "%s" not found:', $id);
- if (!$this->container) {
- $class = null;
- } elseif ($this->container->has($id) || isset($this->container->getRemovedIds()[$id])) {
- $msg[] = 'even though it exists in the app\'s container,';
- } else {
- try {
- $this->container->get($id);
- $class = null;
- } catch (ServiceNotFoundException $e) {
- if ($e->getAlternatives()) {
- $msg[] = sprintf('did you mean %s? Anyway,', $this->formatAlternatives($e->getAlternatives(), 'or'));
- } else {
- $class = null;
- }
- }
- }
- if ($externalId) {
- $msg[] = sprintf('the container inside "%s" is a smaller service locator that %s', $externalId, $this->formatAlternatives());
- } else {
- $msg[] = sprintf('the current service locator %s', $this->formatAlternatives());
- }
- if (!$class) {
- // no-op
- } elseif (is_subclass_of($class, ServiceSubscriberInterface::class)) {
- $msg[] = sprintf('Unless you need extra laziness, try using dependency injection instead. Otherwise, you need to declare it using "%s::getSubscribedServices()".', preg_replace('/([^\\\\]++\\\\)++/', '', $class));
- } else {
- $msg[] = 'Try using dependency injection instead.';
- }
- return new ServiceNotFoundException($id, end($this->loading) ?: null, null, [], implode(' ', $msg));
- }
- private function createCircularReferenceException(string $id, array $path): ContainerExceptionInterface
- {
- return new ServiceCircularReferenceException($id, $path);
- }
- private function formatAlternatives(array $alternatives = null, string $separator = 'and'): string
- {
- $format = '"%s"%s';
- if (null === $alternatives) {
- if (!$alternatives = array_keys($this->factories)) {
- return 'is empty...';
- }
- $format = sprintf('only knows about the %s service%s.', $format, 1 < \count($alternatives) ? 's' : '');
- }
- $last = array_pop($alternatives);
- return sprintf($format, $alternatives ? implode('", "', $alternatives) : $last, $alternatives ? sprintf(' %s "%s"', $separator, $last) : '');
- }
- }
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