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AnalyzeServiceReferencesPass.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\Definition;
015 use Symfony\Component\DependencyInjection\Reference;
016 use Symfony\Component\DependencyInjection\ContainerBuilder;
017
018 /**
019 * Run this pass before passes that need to know more about the relation of
020 * your services.
021 *
022 * This class will populate the ServiceReferenceGraph with information. You can
023 * retrieve the graph in other passes from the compiler.
024 *
025 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
026 */
027 class AnalyzeServiceReferencesPass implements RepeatablePassInterface
028 {
029 private $graph;
030 private $container;
031 private $currentId;
032 private $currentDefinition;
033 private $repeatedPass;
034 private $onlyConstructorArguments;
035
036 /**
037 * Constructor.
038 *
039 * @param bool $onlyConstructorArguments Sets this Service Reference pass to ignore method calls
040 */
041 public function __construct($onlyConstructorArguments = false)
042 {
043 $this->onlyConstructorArguments = (bool) $onlyConstructorArguments;
044 }
045
046 /**
047 * {@inheritdoc}
048 */
049 public function setRepeatedPass(RepeatedPass $repeatedPass)
050 {
051 $this->repeatedPass = $repeatedPass;
052 }
053
054 /**
055 * Processes a ContainerBuilder object to populate the service reference graph.
056 *
057 * @param ContainerBuilder $container
058 */
059 public function process(ContainerBuilder $container)
060 {
061 $this->container = $container;
062 $this->graph = $container->getCompiler()->getServiceReferenceGraph();
063 $this->graph->clear();
064
065 foreach ($container->getDefinitions() as $id => $definition) {
066 if ($definition->isSynthetic() || $definition->isAbstract()) {
067 continue;
068 }
069
070 $this->currentId = $id;
071 $this->currentDefinition = $definition;
072
073 $this->processArguments($definition->getArguments());
074 if ($definition->getFactoryService()) {
075 $this->processArguments(array(new Reference($definition->getFactoryService())));
076 }
077
078 if (!$this->onlyConstructorArguments) {
079 $this->processArguments($definition->getMethodCalls());
080 $this->processArguments($definition->getProperties());
081 if ($definition->getConfigurator()) {
082 $this->processArguments(array($definition->getConfigurator()));
083 }
084 }
085 }
086
087 foreach ($container->getAliases() as $id => $alias) {
088 $this->graph->connect($id, $alias, (string) $alias, $this->getDefinition((string) $alias), null);
089 }
090 }
091
092 /**
093 * Processes service definitions for arguments to find relationships for the service graph.
094 *
095 * @param array $arguments An array of Reference or Definition objects relating to service definitions
096 */
097 private function processArguments(array $arguments)
098 {
099 foreach ($arguments as $argument) {
100 if (is_array($argument)) {
101 $this->processArguments($argument);
102 } elseif ($argument instanceof Reference) {
103 $this->graph->connect(
104 $this->currentId,
105 $this->currentDefinition,
106 $this->getDefinitionId((string) $argument),
107 $this->getDefinition((string) $argument),
108 $argument
109 );
110 } elseif ($argument instanceof Definition) {
111 $this->processArguments($argument->getArguments());
112 $this->processArguments($argument->getMethodCalls());
113 $this->processArguments($argument->getProperties());
114 }
115 }
116 }
117
118 /**
119 * Returns a service definition given the full name or an alias.
120 *
121 * @param string $id A full id or alias for a service definition.
122 *
123 * @return Definition|null The definition related to the supplied id
124 */
125 private function getDefinition($id)
126 {
127 $id = $this->getDefinitionId($id);
128
129 return null === $id ? null : $this->container->getDefinition($id);
130 }
131
132 private function getDefinitionId($id)
133 {
134 while ($this->container->hasAlias($id)) {
135 $id = (string) $this->container->getAlias($id);
136 }
137
138 if (!$this->container->hasDefinition($id)) {
139 return;
140 }
141
142 return $id;
143 }
144 }
145