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ReplaceAliasByActualDefinitionPass.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\ContainerBuilder;
015 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
016 use Symfony\Component\DependencyInjection\Reference;
017
018 /**
019 * Replaces aliases with actual service definitions, effectively removing these
020 * aliases.
021 *
022 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
023 */
024 class ReplaceAliasByActualDefinitionPass implements CompilerPassInterface
025 {
026 private $compiler;
027 private $formatter;
028 private $sourceId;
029
030 /**
031 * Process the Container to replace aliases with service definitions.
032 *
033 * @param ContainerBuilder $container
034 *
035 * @throws InvalidArgumentException if the service definition does not exist
036 */
037 public function process(ContainerBuilder $container)
038 {
039 $this->compiler = $container->getCompiler();
040 $this->formatter = $this->compiler->getLoggingFormatter();
041
042 foreach ($container->getAliases() as $id => $alias) {
043 $aliasId = (string) $alias;
044
045 try {
046 $definition = $container->getDefinition($aliasId);
047 } catch (InvalidArgumentException $e) {
048 throw new InvalidArgumentException(sprintf('Unable to replace alias "%s" with "%s".', $alias, $id), null, $e);
049 }
050
051 if ($definition->isPublic()) {
052 continue;
053 }
054
055 $definition->setPublic(true);
056 $container->setDefinition($id, $definition);
057 $container->removeDefinition($aliasId);
058
059 $this->updateReferences($container, $aliasId, $id);
060
061 // we have to restart the process due to concurrent modification of
062 // the container
063 $this->process($container);
064
065 break;
066 }
067 }
068
069 /**
070 * Updates references to remove aliases.
071 *
072 * @param ContainerBuilder $container The container
073 * @param string $currentId The alias identifier being replaced
074 * @param string $newId The id of the service the alias points to
075 */
076 private function updateReferences($container, $currentId, $newId)
077 {
078 foreach ($container->getAliases() as $id => $alias) {
079 if ($currentId === (string) $alias) {
080 $container->setAlias($id, $newId);
081 }
082 }
083
084 foreach ($container->getDefinitions() as $id => $definition) {
085 $this->sourceId = $id;
086
087 $definition->setArguments(
088 $this->updateArgumentReferences($definition->getArguments(), $currentId, $newId)
089 );
090
091 $definition->setMethodCalls(
092 $this->updateArgumentReferences($definition->getMethodCalls(), $currentId, $newId)
093 );
094
095 $definition->setProperties(
096 $this->updateArgumentReferences($definition->getProperties(), $currentId, $newId)
097 );
098 }
099 }
100
101 /**
102 * Updates argument references.
103 *
104 * @param array $arguments An array of Arguments
105 * @param string $currentId The alias identifier
106 * @param string $newId The identifier the alias points to
107 *
108 * @return array
109 */
110 private function updateArgumentReferences(array $arguments, $currentId, $newId)
111 {
112 foreach ($arguments as $k => $argument) {
113 if (is_array($argument)) {
114 $arguments[$k] = $this->updateArgumentReferences($argument, $currentId, $newId);
115 } elseif ($argument instanceof Reference) {
116 if ($currentId === (string) $argument) {
117 $arguments[$k] = new Reference($newId, $argument->getInvalidBehavior());
118 $this->compiler->addLogMessage($this->formatter->formatUpdateReference($this, $this->sourceId, $currentId, $newId));
119 }
120 }
121 }
122
123 return $arguments;
124 }
125 }
126