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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\DependencyInjection\Compiler;
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13
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14 use Symfony\Component\DependencyInjection\Argument\ArgumentInterface;
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15 use Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument;
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16 use Symfony\Component\DependencyInjection\ContainerBuilder;
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17 use Symfony\Component\DependencyInjection\ContainerInterface;
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18 use Symfony\Component\DependencyInjection\Definition;
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19 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
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20 use Symfony\Component\DependencyInjection\Reference;
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21
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22 /**
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23 * Emulates the invalid behavior if the reference is not found within the
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24 * container.
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25 *
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26 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
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27 */
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28 class ResolveInvalidReferencesPass implements CompilerPassInterface
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29 {
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30 private $container;
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31 private $signalingException;
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32
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33 /**
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34 * Process the ContainerBuilder to resolve invalid references.
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35 */
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36 public function process(ContainerBuilder $container)
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37 {
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38 $this->container = $container;
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39 $this->signalingException = new RuntimeException('Invalid reference.');
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40
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41 try {
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42 $this->processValue($container->getDefinitions(), 1);
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43 } finally {
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44 $this->container = $this->signalingException = null;
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45 }
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46 }
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47
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48 /**
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49 * Processes arguments to determine invalid references.
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50 *
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51 * @throws RuntimeException When an invalid reference is found
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52 */
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53 private function processValue($value, $rootLevel = 0, $level = 0)
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54 {
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55 if ($value instanceof ServiceClosureArgument) {
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56 $value->setValues($this->processValue($value->getValues(), 1, 1));
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57 } elseif ($value instanceof ArgumentInterface) {
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58 $value->setValues($this->processValue($value->getValues(), $rootLevel, 1 + $level));
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59 } elseif ($value instanceof Definition) {
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60 if ($value->isSynthetic() || $value->isAbstract()) {
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61 return $value;
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62 }
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63 $value->setArguments($this->processValue($value->getArguments(), 0));
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64 $value->setProperties($this->processValue($value->getProperties(), 1));
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65 $value->setMethodCalls($this->processValue($value->getMethodCalls(), 2));
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66 } elseif (\is_array($value)) {
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67 $i = 0;
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68
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69 foreach ($value as $k => $v) {
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70 try {
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71 if (false !== $i && $k !== $i++) {
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72 $i = false;
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73 }
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74 if ($v !== $processedValue = $this->processValue($v, $rootLevel, 1 + $level)) {
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75 $value[$k] = $processedValue;
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76 }
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77 } catch (RuntimeException $e) {
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78 if ($rootLevel < $level || ($rootLevel && !$level)) {
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79 unset($value[$k]);
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80 } elseif ($rootLevel) {
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81 throw $e;
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82 } else {
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83 $value[$k] = null;
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84 }
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85 }
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86 }
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87
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88 // Ensure numerically indexed arguments have sequential numeric keys.
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89 if (false !== $i) {
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90 $value = array_values($value);
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91 }
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92 } elseif ($value instanceof Reference) {
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93 if ($this->container->has($value)) {
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94 return $value;
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95 }
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96 $invalidBehavior = $value->getInvalidBehavior();
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97
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98 // resolve invalid behavior
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99 if (ContainerInterface::NULL_ON_INVALID_REFERENCE === $invalidBehavior) {
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100 $value = null;
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101 } elseif (ContainerInterface::IGNORE_ON_INVALID_REFERENCE === $invalidBehavior) {
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102 if (0 < $level || $rootLevel) {
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103 throw $this->signalingException;
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104 }
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105 $value = null;
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106 }
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107 }
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108
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109 return $value;
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110 }
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111 }
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