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ChildDefinition.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;
013
014 use Symfony\Component\DependencyInjection\Exception\BadMethodCallException;
015 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
016 use Symfony\Component\DependencyInjection\Exception\OutOfBoundsException;
017
018 /**
019 * This definition extends another definition.
020 *
021 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
022 */
023 class ChildDefinition extends Definition
024 {
025 private $parent;
026
027 /**
028 * @param string $parent The id of Definition instance to decorate
029 */
030 public function __construct($parent)
031 {
032 $this->parent = $parent;
033 $this->setPrivate(false);
034 }
035
036 /**
037 * Returns the Definition to inherit from.
038 *
039 * @return string
040 */
041 public function getParent()
042 {
043 return $this->parent;
044 }
045
046 /**
047 * Sets the Definition to inherit from.
048 *
049 * @param string $parent
050 *
051 * @return $this
052 */
053 public function setParent($parent)
054 {
055 $this->parent = $parent;
056
057 return $this;
058 }
059
060 /**
061 * Gets an argument to pass to the service constructor/factory method.
062 *
063 * If replaceArgument() has been used to replace an argument, this method
064 * will return the replacement value.
065 *
066 * @param int|string $index
067 *
068 * @return mixed The argument value
069 *
070 * @throws OutOfBoundsException When the argument does not exist
071 */
072 public function getArgument($index)
073 {
074 if (\array_key_exists('index_'.$index, $this->arguments)) {
075 return $this->arguments['index_'.$index];
076 }
077
078 return parent::getArgument($index);
079 }
080
081 /**
082 * You should always use this method when overwriting existing arguments
083 * of the parent definition.
084 *
085 * If you directly call setArguments() keep in mind that you must follow
086 * certain conventions when you want to overwrite the arguments of the
087 * parent definition, otherwise your arguments will only be appended.
088 *
089 * @param int|string $index
090 * @param mixed $value
091 *
092 * @return $this
093 *
094 * @throws InvalidArgumentException when $index isn't an integer
095 */
096 public function replaceArgument($index, $value)
097 {
098 if (\is_int($index)) {
099 $this->arguments['index_'.$index] = $value;
100 } elseif (0 === strpos($index, '$')) {
101 $this->arguments[$index] = $value;
102 } else {
103 throw new InvalidArgumentException('The argument must be an existing index or the name of a constructor\'s parameter.');
104 }
105
106 return $this;
107 }
108
109 /**
110 * @internal
111 */
112 public function setAutoconfigured($autoconfigured)
113 {
114 throw new BadMethodCallException('A ChildDefinition cannot be autoconfigured.');
115 }
116
117 /**
118 * @internal
119 */
120 public function setInstanceofConditionals(array $instanceof)
121 {
122 throw new BadMethodCallException('A ChildDefinition cannot have instanceof conditionals set on it.');
123 }
124 }
125
126 class_alias(ChildDefinition::class, DefinitionDecorator::class);
127