File "Container.php"
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\DependencyInjection;
use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
use Symfony\Component\DependencyInjection\Argument\ServiceLocator as ArgumentServiceLocator;
use Symfony\Component\DependencyInjection\Exception\EnvNotFoundException;
use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
use Symfony\Component\DependencyInjection\Exception\ParameterCircularReferenceException;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
use Symfony\Component\DependencyInjection\ParameterBag\EnvPlaceholderParameterBag;
use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
use Symfony\Contracts\Service\ResetInterface;
// Help opcache.preload discover always-needed symbols
class_exists(RewindableGenerator::class);
class_exists(ArgumentServiceLocator::class);
/**
* Container is a dependency injection container.
*
* It gives access to object instances (services).
* Services and parameters are simple key/pair stores.
* The container can have four possible behaviors when a service
* does not exist (or is not initialized for the last case):
*
* * EXCEPTION_ON_INVALID_REFERENCE: Throws an exception (the default)
* * NULL_ON_INVALID_REFERENCE: Returns null
* * IGNORE_ON_INVALID_REFERENCE: Ignores the wrapping command asking for the reference
* (for instance, ignore a setter if the service does not exist)
* * IGNORE_ON_UNINITIALIZED_REFERENCE: Ignores/returns null for uninitialized services or invalid references
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class Container implements ContainerInterface, ResetInterface
{
protected $parameterBag;
protected $services = [];
protected $privates = [];
protected $fileMap = [];
protected $methodMap = [];
protected $factories = [];
protected $aliases = [];
protected $loading = [];
protected $resolving = [];
protected $syntheticIds = [];
private $envCache = [];
private $compiled = false;
private $getEnv;
public function __construct(ParameterBagInterface $parameterBag = null)
{
$this->parameterBag = $parameterBag ?? new EnvPlaceholderParameterBag();
}
/**
* Compiles the container.
*
* This method does two things:
*
* * Parameter values are resolved;
* * The parameter bag is frozen.
*/
public function compile()
{
$this->parameterBag->resolve();
$this->parameterBag = new FrozenParameterBag($this->parameterBag->all());
$this->compiled = true;
}
/**
* Returns true if the container is compiled.
*
* @return bool
*/
public function isCompiled()
{
return $this->compiled;
}
/**
* Gets the service container parameter bag.
*
* @return ParameterBagInterface
*/
public function getParameterBag()
{
return $this->parameterBag;
}
/**
* Gets a parameter.
*
* @return array|bool|string|int|float|\UnitEnum|null
*
* @throws InvalidArgumentException if the parameter is not defined
*/
public function getParameter(string $name)
{
return $this->parameterBag->get($name);
}
/**
* @return bool
*/
public function hasParameter(string $name)
{
return $this->parameterBag->has($name);
}
/**
* Sets a parameter.
*
* @param string $name The parameter name
* @param array|bool|string|int|float|\UnitEnum|null $value The parameter value
*/
public function setParameter(string $name, $value)
{
$this->parameterBag->set($name, $value);
}
/**
* Sets a service.
*
* Setting a synthetic service to null resets it: has() returns false and get()
* behaves in the same way as if the service was never created.
*/
public function set(string $id, ?object $service)
{
// Runs the internal initializer; used by the dumped container to include always-needed files
if (isset($this->privates['service_container']) && $this->privates['service_container'] instanceof \Closure) {
$initialize = $this->privates['service_container'];
unset($this->privates['service_container']);
$initialize();
}
if ('service_container' === $id) {
throw new InvalidArgumentException('You cannot set service "service_container".');
}
if (!(isset($this->fileMap[$id]) || isset($this->methodMap[$id]))) {
if (isset($this->syntheticIds[$id]) || !isset($this->getRemovedIds()[$id])) {
// no-op
} elseif (null === $service) {
throw new InvalidArgumentException(sprintf('The "%s" service is private, you cannot unset it.', $id));
} else {
throw new InvalidArgumentException(sprintf('The "%s" service is private, you cannot replace it.', $id));
}
} elseif (isset($this->services[$id])) {
throw new InvalidArgumentException(sprintf('The "%s" service is already initialized, you cannot replace it.', $id));
}
if (isset($this->aliases[$id])) {
unset($this->aliases[$id]);
}
if (null === $service) {
unset($this->services[$id]);
return;
}
$this->services[$id] = $service;
}
/**
* Returns true if the given service is defined.
*
* @param string $id The service identifier
*
* @return bool
*/
public function has(string $id)
{
if (isset($this->aliases[$id])) {
$id = $this->aliases[$id];
}
if (isset($this->services[$id])) {
return true;
}
if ('service_container' === $id) {
return true;
}
return isset($this->fileMap[$id]) || isset($this->methodMap[$id]);
}
/**
* Gets a service.
*
* @return object|null
*
* @throws ServiceCircularReferenceException When a circular reference is detected
* @throws ServiceNotFoundException When the service is not defined
* @throws \Exception if an exception has been thrown when the service has been resolved
*
* @see Reference
*/
public function get(string $id, int $invalidBehavior = /* self::EXCEPTION_ON_INVALID_REFERENCE */ 1)
{
return $this->services[$id]
?? $this->services[$id = $this->aliases[$id] ?? $id]
?? ('service_container' === $id ? $this : ($this->factories[$id] ?? [$this, 'make'])($id, $invalidBehavior));
}
/**
* Creates a service.
*
* As a separate method to allow "get()" to use the really fast `??` operator.
*/
private function make(string $id, int $invalidBehavior)
{
if (isset($this->loading[$id])) {
throw new ServiceCircularReferenceException($id, array_merge(array_keys($this->loading), [$id]));
}
$this->loading[$id] = true;
try {
if (isset($this->fileMap[$id])) {
return /* self::IGNORE_ON_UNINITIALIZED_REFERENCE */ 4 === $invalidBehavior ? null : $this->load($this->fileMap[$id]);
} elseif (isset($this->methodMap[$id])) {
return /* self::IGNORE_ON_UNINITIALIZED_REFERENCE */ 4 === $invalidBehavior ? null : $this->{$this->methodMap[$id]}();
}
} catch (\Exception $e) {
unset($this->services[$id]);
throw $e;
} finally {
unset($this->loading[$id]);
}
if (/* self::EXCEPTION_ON_INVALID_REFERENCE */ 1 === $invalidBehavior) {
if (!$id) {
throw new ServiceNotFoundException($id);
}
if (isset($this->syntheticIds[$id])) {
throw new ServiceNotFoundException($id, null, null, [], sprintf('The "%s" service is synthetic, it needs to be set at boot time before it can be used.', $id));
}
if (isset($this->getRemovedIds()[$id])) {
throw new ServiceNotFoundException($id, null, null, [], sprintf('The "%s" service or alias has been removed or inlined when the container was compiled. You should either make it public, or stop using the container directly and use dependency injection instead.', $id));
}
$alternatives = [];
foreach ($this->getServiceIds() as $knownId) {
if ('' === $knownId || '.' === $knownId[0]) {
continue;
}
$lev = levenshtein($id, $knownId);
if ($lev <= \strlen($id) / 3 || str_contains($knownId, $id)) {
$alternatives[] = $knownId;
}
}
throw new ServiceNotFoundException($id, null, null, $alternatives);
}
return null;
}
/**
* Returns true if the given service has actually been initialized.
*
* @return bool
*/
public function initialized(string $id)
{
if (isset($this->aliases[$id])) {
$id = $this->aliases[$id];
}
if ('service_container' === $id) {
return false;
}
return isset($this->services[$id]);
}
/**
* {@inheritdoc}
*/
public function reset()
{
$services = $this->services + $this->privates;
$this->services = $this->factories = $this->privates = [];
foreach ($services as $service) {
try {
if ($service instanceof ResetInterface) {
$service->reset();
}
} catch (\Throwable $e) {
continue;
}
}
}
/**
* Gets all service ids.
*
* @return string[]
*/
public function getServiceIds()
{
return array_map('strval', array_unique(array_merge(['service_container'], array_keys($this->fileMap), array_keys($this->methodMap), array_keys($this->aliases), array_keys($this->services))));
}
/**
* Gets service ids that existed at compile time.
*
* @return array
*/
public function getRemovedIds()
{
return [];
}
/**
* Camelizes a string.
*
* @return string
*/
public static function camelize(string $id)
{
return strtr(ucwords(strtr($id, ['_' => ' ', '.' => '_ ', '\\' => '_ '])), [' ' => '']);
}
/**
* A string to underscore.
*
* @return string
*/
public static function underscore(string $id)
{
return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], ['\\1_\\2', '\\1_\\2'], str_replace('_', '.', $id)));
}
/**
* Creates a service by requiring its factory file.
*/
protected function load(string $file)
{
return require $file;
}
/**
* Fetches a variable from the environment.
*
* @return mixed
*
* @throws EnvNotFoundException When the environment variable is not found and has no default value
*/
protected function getEnv(string $name)
{
if (isset($this->resolving[$envName = "env($name)"])) {
throw new ParameterCircularReferenceException(array_keys($this->resolving));
}
if (isset($this->envCache[$name]) || \array_key_exists($name, $this->envCache)) {
return $this->envCache[$name];
}
if (!$this->has($id = 'container.env_var_processors_locator')) {
$this->set($id, new ServiceLocator([]));
}
if (!$this->getEnv) {
$this->getEnv = \Closure::fromCallable([$this, 'getEnv']);
}
$processors = $this->get($id);
if (false !== $i = strpos($name, ':')) {
$prefix = substr($name, 0, $i);
$localName = substr($name, 1 + $i);
} else {
$prefix = 'string';
$localName = $name;
}
$processor = $processors->has($prefix) ? $processors->get($prefix) : new EnvVarProcessor($this);
$this->resolving[$envName] = true;
try {
return $this->envCache[$name] = $processor->getEnv($prefix, $localName, $this->getEnv);
} finally {
unset($this->resolving[$envName]);
}
}
/**
* @param string|false $registry
* @param string|bool $load
*
* @return mixed
*
* @internal
*/
final protected function getService($registry, string $id, ?string $method, $load)
{
if ('service_container' === $id) {
return $this;
}
if (\is_string($load)) {
throw new RuntimeException($load);
}
if (null === $method) {
return false !== $registry ? $this->{$registry}[$id] ?? null : null;
}
if (false !== $registry) {
return $this->{$registry}[$id] ?? $this->{$registry}[$id] = $load ? $this->load($method) : $this->{$method}();
}
if (!$load) {
return $this->{$method}();
}
return ($factory = $this->factories[$id] ?? $this->factories['service_container'][$id] ?? null) ? $factory() : $this->load($method);
}
private function __clone()
{
}
}