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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\di\dependencies;
use Psr\Container\ContainerInterface;
use yii\di\contracts\DependencyInterface;
use yii\di\exceptions\InvalidConfigException;
* Reference points to a class name in the container
class ClassDependency implements DependencyInterface
{
private $class;
private $optional;
* Constructor.
* @param string $class the class name
public function __construct(string $class, bool $optional)
$this->class = $class;
$this->optional = $optional;
}
public function resolve(ContainerInterface $container)
try {
$result = $container->get($this->class);
} catch (\Throwable $t) {
if ($this->optional) {
return null;
throw $t;
if (!$result instanceof $this->class) {
throw new InvalidConfigException('Container returned incorrect type for service ' . $this->class);
return $result;
yiisoft /
di
