protected ArgumentsResolver::getArgument(\ReflectionParameter $parameter)
Gets the argument value for a parameter.
Parameters
\ReflectionParameter $parameter: The parameter of a callable to get the value for.
Return value
mixed The value of the requested parameter value.
Throws
\RuntimeException Thrown when there is a missing parameter.
File
- core/lib/Drupal/Component/Utility/ArgumentsResolver.php, line 71
Class
- ArgumentsResolver
- Resolves the arguments to pass to a callable.
Namespace
Drupal\Component\Utility
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | protected function getArgument(\ReflectionParameter $parameter) { $parameter_type_hint = $parameter->getClass(); $parameter_name = $parameter->getName(); // If the argument exists and is NULL, return it, regardless of // parameter type hint. if (!isset($this->objects[$parameter_name]) && array_key_exists($parameter_name, $this->objects)) { return NULL; } if ($parameter_type_hint) { // If the argument exists and complies with the type hint, return it. if (isset($this->objects[$parameter_name]) && is_object($this->objects[$parameter_name]) && $parameter_type_hint->isInstance($this->objects[$parameter_name])) { return $this->objects[$parameter_name]; } // Otherwise, resolve wildcard arguments by type matching. foreach ($this->wildcards as $wildcard) { if ($parameter_type_hint->isInstance($wildcard)) { return $wildcard; } } } elseif (isset($this->scalars[$parameter_name])) { return $this->scalars[$parameter_name]; } // If the callable provides a default value, use it. if ($parameter->isDefaultValueAvailable()) { return $parameter->getDefaultValue(); } // Can't resolve it: call a method that throws an exception or can be // overridden to do something else. return $this->handleUnresolvedArgument($parameter);} |
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