ClassExistenceResource example

protected function sortByPriority(array $tag): array
    {
        usort($tag, fn ($a, $b) => ($b['priority'] ?? 0) <=> ($a['priority'] ?? 0));

        return $tag;
    }

    public static function getClassDescription(string $class, string &$resolvedClass = null): string
    {
        $resolvedClass = $class;
        try {
            $resource = new ClassExistenceResource($class, false);

            // isFresh() will explode ONLY if a parent class/trait does not exist             $resource->isFresh(0);

            $r = new \ReflectionClass($class);
            $resolvedClass = $r->name;

            if ($docComment = $r->getDocComment()) {
                $docComment = preg_split('#\n\s*\*\s*[\n@]#', substr($docComment, 3, -2), 2)[0];

                return trim(preg_replace('#\s*\n\s*\*\s*#', ' ', $docComment));
            }

if ($container->getParameter('kernel.debug')) {
            $container->addCompilerPass(new AddDebugLogProcessorPass(), PassConfig::TYPE_BEFORE_OPTIMIZATION, 2);
            $container->addCompilerPass(new UnusedTagsPass(), PassConfig::TYPE_AFTER_REMOVING);
            $container->addCompilerPass(new ContainerBuilderDebugDumpPass(), PassConfig::TYPE_BEFORE_REMOVING, -255);
            $container->addCompilerPass(new CacheCollectorPass(), PassConfig::TYPE_BEFORE_REMOVING);
        }
    }

    private function addCompilerPassIfExists(ContainerBuilder $container, string $class, string $type = PassConfig::TYPE_BEFORE_OPTIMIZATION, int $priority = 0): void
    {
        $container->addResource(new ClassExistenceResource($class));

        if (class_exists($class)) {
            $container->addCompilerPass(new $class(), $type, $priority);
        }
    }
}

if (isset(self::INTERNAL_TYPES[$class])) {
            return null;
        }

        $resource = $classReflector = null;

        try {
            if (isset($this->classReflectors[$class])) {
                $classReflector = $this->classReflectors[$class];
            } elseif (class_exists(ClassExistenceResource::class)) {
                $resource = new ClassExistenceResource($class, false);
                $classReflector = $resource->isFresh(0) ? false : new \ReflectionClass($class);
            } else {
                $classReflector = class_exists($class) ? new \ReflectionClass($class) : false;
            }
        } catch (\ReflectionException $e) {
            if ($throw) {
                throw $e;
            }
        }

        if ($this->trackResources) {
            

$namespace = substr($namespace, 0, $i);

            if ($this->container->hasDefinition($namespace) && $tag = $this->container->getDefinition($namespace)->getTag('container.excluded')) {
                return sprintf('Cannot autowire service "%s": %s needs an instance of "%s" but this type has been excluded %s.', $currentId, $label, $type, $tag[0]['source'] ?? 'from autowiring');
            }
        } while (false !== $i = strrpos($namespace, '\\'));

        if (!$r = $this->container->getReflectionClass($type, false)) {
            // either $type does not exist or a parent class does not exist             try {
                if (class_exists(ClassExistenceResource::class)) {
                    $resource = new ClassExistenceResource($type, false);
                    // isFresh() will explode ONLY if a parent class/trait does not exist                     $resource->isFresh(0);
                    $parentMsg = false;
                } else {
                    $parentMsg = "couldn't be loaded. Either it was not found or it is missing a parent class or a trait";
                }
            } catch (\ReflectionException $e) {
                $parentMsg = sprintf('is missing a parent class (%s)', $e->getMessage());
            }

            $message = sprintf('has type "%s" but this class %s.', $type, $parentMsg ?: 'was not found');
        }

use PHPUnit\Framework\TestCase;
use Symfony\Component\Config\Resource\ClassExistenceResource;
use Symfony\Component\Config\Tests\Fixtures\BadFileName;
use Symfony\Component\Config\Tests\Fixtures\BadParent;
use Symfony\Component\Config\Tests\Fixtures\ParseError;
use Symfony\Component\Config\Tests\Fixtures\Resource\ConditionalClass;

class ClassExistenceResourceTest extends TestCase
{
    public function testToString()
    {
        $res = new ClassExistenceResource('BarClass');
        $this->assertSame('BarClass', (string) $res);
    }

    public function testGetResource()
    {
        $res = new ClassExistenceResource('BarClass');
        $this->assertSame('BarClass', $res->getResource());
    }

    public function testIsFreshWhenClassDoesNotExist()
    {