public static function Drupal::classResolver in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal.php \Drupal::classResolver()

Retrieves the class resolver.

This is to be used in procedural code such as module files to instantiate an object of a class that implements \Drupal\Core\DependencyInjection\ContainerInjectionInterface.

One common usecase is to provide a class which contains the actual code of a hook implementation, without having to create a service.

Parameters

string $class: (optional) A class name to instantiate.

Return value

\Drupal\Core\DependencyInjection\ClassResolverInterface|object The class resolver or if $class is provided, a class instance with a given class definition.

Throws

\InvalidArgumentException If $class does not exist.

14 calls to Drupal::classResolver()

DrupalTest::testClassResolver in core/tests/Drupal/Tests/Core/DrupalTest.php

Tests the classResolver method.

DrupalTest::testClassResolverWithClass in core/tests/Drupal/Tests/Core/DrupalTest.php

Tests the classResolver method when called with a class.

layout_builder_cron in core/modules/layout_builder/layout_builder.module

Implements hook_cron().

layout_builder_entity_delete in core/modules/layout_builder/layout_builder.module

Implements hook_entity_delete().

layout_builder_entity_presave in core/modules/layout_builder/layout_builder.module

Implements hook_entity_presave().

... See full list

File

core/lib/Drupal.php, line 363

Class

Drupal

Static Service Container wrapper.

Code

public static function classResolver($class = NULL) {
  if ($class) {
    return static::getContainer()
      ->get('class_resolver')
      ->getInstanceFromDefinition($class);
  }
  return static::getContainer()
    ->get('class_resolver');
}