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- 28.08.2024
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ServiceLocatorTagPass.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\DependencyInjection\Compiler;
013
014 use Symfony\Component\DependencyInjection\Alias;
015 use Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument;
016 use Symfony\Component\DependencyInjection\ContainerBuilder;
017 use Symfony\Component\DependencyInjection\Definition;
018 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
019 use Symfony\Component\DependencyInjection\Reference;
020 use Symfony\Component\DependencyInjection\ServiceLocator;
021
022 /**
023 * Applies the "container.service_locator" tag by wrapping references into ServiceClosureArgument instances.
024 *
025 * @author Nicolas Grekas <p@tchwork.com>
026 */
027 final class ServiceLocatorTagPass extends AbstractRecursivePass
028 {
029 protected function processValue($value, $isRoot = false)
030 {
031 if (!$value instanceof Definition || !$value->hasTag('container.service_locator')) {
032 return parent::processValue($value, $isRoot);
033 }
034
035 if (!$value->getClass()) {
036 $value->setClass(ServiceLocator::class);
037 }
038
039 $arguments = $value->getArguments();
040 if (!isset($arguments[0]) || !\is_array($arguments[0])) {
041 throw new InvalidArgumentException(sprintf('Invalid definition for service "%s": an array of references is expected as first argument when the "container.service_locator" tag is set.', $this->currentId));
042 }
043
044 $i = 0;
045
046 foreach ($arguments[0] as $k => $v) {
047 if ($v instanceof ServiceClosureArgument) {
048 continue;
049 }
050 if (!$v instanceof Reference) {
051 throw new InvalidArgumentException(sprintf('Invalid definition for service "%s": an array of references is expected as first argument when the "container.service_locator" tag is set, "%s" found for key "%s".', $this->currentId, \is_object($v) ? \get_class($v) : \gettype($v), $k));
052 }
053
054 if ($i === $k) {
055 unset($arguments[0][$k]);
056
057 $k = (string) $v;
058 ++$i;
059 } elseif (\is_int($k)) {
060 $i = null;
061 }
062 $arguments[0][$k] = new ServiceClosureArgument($v);
063 }
064 ksort($arguments[0]);
065
066 $value->setArguments($arguments);
067
068 $id = 'service_locator.'.ContainerBuilder::hash($value);
069
070 if ($isRoot) {
071 if ($id !== $this->currentId) {
072 $this->container->setAlias($id, new Alias($this->currentId, false));
073 }
074
075 return $value;
076 }
077
078 $this->container->setDefinition($id, $value->setPublic(false));
079
080 return new Reference($id);
081 }
082
083 /**
084 * @param Reference[] $refMap
085 * @param string|null $callerId
086 *
087 * @return Reference
088 */
089 public static function register(ContainerBuilder $container, array $refMap, $callerId = null)
090 {
091 foreach ($refMap as $id => $ref) {
092 if (!$ref instanceof Reference) {
093 throw new InvalidArgumentException(sprintf('Invalid service locator definition: only services can be referenced, "%s" found for key "%s". Inject parameter values using constructors instead.', \is_object($ref) ? \get_class($ref) : \gettype($ref), $id));
094 }
095 $refMap[$id] = new ServiceClosureArgument($ref);
096 }
097 ksort($refMap);
098
099 $locator = (new Definition(ServiceLocator::class))
100 ->addArgument($refMap)
101 ->setPublic(false)
102 ->addTag('container.service_locator');
103
104 if (null !== $callerId && $container->hasDefinition($callerId)) {
105 $locator->setBindings($container->getDefinition($callerId)->getBindings());
106 }
107
108 if (!$container->hasDefinition($id = 'service_locator.'.ContainerBuilder::hash($locator))) {
109 $container->setDefinition($id, $locator);
110 }
111
112 if (null !== $callerId) {
113 $locatorId = $id;
114 // Locators are shared when they hold the exact same list of factories;
115 // to have them specialized per consumer service, we use a cloning factory
116 // to derivate customized instances from the prototype one.
117 $container->register($id .= '.'.$callerId, ServiceLocator::class)
118 ->setPublic(false)
119 ->setFactory([new Reference($locatorId), 'withContext'])
120 ->addArgument($callerId)
121 ->addArgument(new Reference('service_container'));
122 }
123
124 return new Reference($id);
125 }
126 }
127