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ResolveReferencesToAliasesPass.php
01 <?php
02
03 /*
04 * This file is part of the Symfony package.
05 *
06 * (c) Fabien Potencier <fabien@symfony.com>
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace Symfony\Component\DependencyInjection\Compiler;
13
14 use Symfony\Component\DependencyInjection\Alias;
15 use Symfony\Component\DependencyInjection\Reference;
16 use Symfony\Component\DependencyInjection\ContainerBuilder;
17
18 /**
19 * Replaces all references to aliases with references to the actual service.
20 *
21 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
22 */
23 class ResolveReferencesToAliasesPass implements CompilerPassInterface
24 {
25 private $container;
26
27 /**
28 * Processes the ContainerBuilder to replace references to aliases with actual service references.
29 *
30 * @param ContainerBuilder $container
31 */
32 public function process(ContainerBuilder $container)
33 {
34 $this->container = $container;
35
36 foreach ($container->getDefinitions() as $definition) {
37 if ($definition->isSynthetic() || $definition->isAbstract()) {
38 continue;
39 }
40
41 $definition->setArguments($this->processArguments($definition->getArguments()));
42 $definition->setMethodCalls($this->processArguments($definition->getMethodCalls()));
43 $definition->setProperties($this->processArguments($definition->getProperties()));
44 }
45
46 foreach ($container->getAliases() as $id => $alias) {
47 $aliasId = (string) $alias;
48 if ($aliasId !== $defId = $this->getDefinitionId($aliasId)) {
49 $container->setAlias($id, new Alias($defId, $alias->isPublic()));
50 }
51 }
52 }
53
54 /**
55 * Processes the arguments to replace aliases.
56 *
57 * @param array $arguments An array of References
58 *
59 * @return array An array of References
60 */
61 private function processArguments(array $arguments)
62 {
63 foreach ($arguments as $k => $argument) {
64 if (is_array($argument)) {
65 $arguments[$k] = $this->processArguments($argument);
66 } elseif ($argument instanceof Reference) {
67 $defId = $this->getDefinitionId($id = (string) $argument);
68
69 if ($defId !== $id) {
70 $arguments[$k] = new Reference($defId, $argument->getInvalidBehavior(), $argument->isStrict());
71 }
72 }
73 }
74
75 return $arguments;
76 }
77
78 /**
79 * Resolves an alias into a definition id.
80 *
81 * @param string $id The definition or alias id to resolve
82 *
83 * @return string The definition id with aliases resolved
84 */
85 private function getDefinitionId($id)
86 {
87 while ($this->container->hasAlias($id)) {
88 $id = (string) $this->container->getAlias($id);
89 }
90
91 return $id;
92 }
93 }
94