Symfony Profiler

<?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\VarExporter;
use Symfony\Component\VarExporter\Internal\Hydrator;
use Symfony\Component\VarExporter\Internal\LazyObjectRegistry as Registry;
use Symfony\Component\VarExporter\Internal\LazyObjectState;
use Symfony\Component\VarExporter\Internal\LazyObjectTrait;
trait LazyGhostTrait
{
use LazyObjectTrait;
/**
* Creates a lazy-loading ghost instance.
*
* When the initializer is a closure, it should initialize all properties at
* once and is given the instance to initialize as argument.
*
* When the initializer is an array of closures, it should be indexed by
* properties and closures should accept 4 arguments: the instance to
* initialize, the property to initialize, its write-scope, and its default
* value. Each closure should return the value of the corresponding property.
* The special "\0" key can be used to define a closure that returns all
* properties at once when full-initialization is needed; it takes the
* instance and its default properties as arguments.
*
* Properties should be indexed by their array-cast name, see
* https://php.net/manual/language.types.array#language.types.array.casting
*
* @param (\Closure(static):void
* |array<string, \Closure(static, string, ?string, mixed):mixed>
* |array{"\0": \Closure(static, array<string, mixed>):array<string, mixed>}) $initializer
* @param array<string, true>|null $skippedProperties An array indexed by the properties to skip, aka the ones
* that the initializer doesn't set when its a closure
* @param static|null $instance
*/
public static function createLazyGhost(\Closure|array $initializer, array $skippedProperties = null, object $instance = null): static
{
$onlyProperties = null === $skippedProperties && \is_array($initializer) ? $initializer : null;
if (self::class !== $class = $instance ? $instance::class : static::class) {
$skippedProperties["\0".self::class."\0lazyObjectState"] = true;
} elseif (\defined($class.'::LAZY_OBJECT_PROPERTY_SCOPES')) {
Hydrator::$propertyScopes[$class] ??= $class::LAZY_OBJECT_PROPERTY_SCOPES;
}
$instance ??= (Registry::$classReflectors[$class] ??= new \ReflectionClass($class))->newInstanceWithoutConstructor();
Registry::$defaultProperties[$class] ??= (array) $instance;
$instance->lazyObjectState = new LazyObjectState($initializer, $skippedProperties ??= []);
foreach (Registry::$classResetters[$class] ??= Registry::getClassResetters($class) as $reset) {
$reset($instance, $skippedProperties, $onlyProperties);
}
return $instance;
}
/**
* Returns whether the object is initialized.
*
* @param $partial Whether partially initialized objects should be considered as initialized
*/
public function isLazyObjectInitialized(bool $partial = false): bool
{
if (!$state = $this->lazyObjectState ?? null) {
return true;
}
if (!\is_array($state->initializer)) {
return LazyObjectState::STATUS_INITIALIZED_FULL === $state->status;
}
$class = $this::class;
$properties = (array) $this;
if ($partial) {
return (bool) array_intersect_key($state->initializer, $properties);
}
$propertyScopes = Hydrator::$propertyScopes[$class] ??= Hydrator::getPropertyScopes($class);
foreach ($state->initializer as $key => $initializer) {
if (!\array_key_exists($key, $properties) && isset($propertyScopes[$key])) {
return false;
}
}
return true;
}
/**
* Forces initialization of a lazy object and returns it.
*/
public function initializeLazyObject(): static
{
if (!$state = $this->lazyObjectState ?? null) {
return $this;
}
if (!\is_array($state->initializer)) {
if (LazyObjectState::STATUS_UNINITIALIZED_FULL === $state->status) {
$state->initialize($this, '', null);
}
return $this;
}
$values = isset($state->initializer["\0"]) ? null : [];
$class = $this::class;
$properties = (array) $this;
$propertyScopes = Hydrator::$propertyScopes[$class] ??= Hydrator::getPropertyScopes($class);
foreach ($state->initializer as $key => $initializer) {
if (\array_key_exists($key, $properties) || ![$scope, $name, $readonlyScope] = $propertyScopes[$key] ?? null) {
continue;
}
$scope = $readonlyScope ?? ('*' !== $scope ? $scope : $class);
if (null === $values) {
if (!\is_array($values = ($state->initializer["\0"])($this, Registry::$defaultProperties[$class]))) {
throw new \TypeError(sprintf('The lazy-initializer defined for instance of "%s" must return an array, got "%s".', $class, get_debug_type($values)));
}
if (\array_key_exists($key, $properties = (array) $this)) {
continue;
}
}
if (\array_key_exists($key, $values)) {
$accessor = Registry::$classAccessors[$scope] ??= Registry::getClassAccessors($scope);
$accessor['set']($this, $name, $properties[$key] = $values[$key]);
} else {
$state->initialize($this, $name, $scope);
$properties = (array) $this;
}
}
return $this;
}
/**
* @return bool Returns false when the object cannot be reset, ie when it's not a lazy object
*/
public function resetLazyObject(): bool
{
if (!$state = $this->lazyObjectState ?? null) {
return false;
}
if (LazyObjectState::STATUS_UNINITIALIZED_FULL !== $state->status) {
$state->reset($this);
}
return true;
}
public function &__get($name): mixed
{
$propertyScopes = Hydrator::$propertyScopes[$this::class] ??= Hydrator::getPropertyScopes($this::class);
$scope = null;
if ([$class, , $readonlyScope] = $propertyScopes[$name] ?? null) {
$scope = Registry::getScope($propertyScopes, $class, $name);
$state = $this->lazyObjectState ?? null;
if ($state && (null === $scope || isset($propertyScopes["\0$scope\0$name"]))
&& LazyObjectState::STATUS_UNINITIALIZED_PARTIAL !== $state->initialize($this, $name, $readonlyScope ?? $scope)
) {
goto get_in_scope;
}
}
if ($parent = (Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['get']) {
if (2 === $parent) {
return parent::__get($name);
}
$value = parent::__get($name);
return $value;
}
if (null === $class) {
$frame = debug_backtrace(\DEBUG_BACKTRACE_IGNORE_ARGS, 1)[0];
trigger_error(sprintf('Undefined property: %s::$%s in %s on line %s', $this::class, $name, $frame['file'], $frame['line']), \E_USER_NOTICE);
}
get_in_scope:
try {
if (null === $scope) {
if (null === $readonlyScope) {
return $this->$name;
}
$value = $this->$name;
return $value;
}
$accessor = Registry::$classAccessors[$scope] ??= Registry::getClassAccessors($scope);
return $accessor['get']($this, $name, null !== $readonlyScope);
} catch (\Error $e) {
if (\Error::class !== $e::class || !str_starts_with($e->getMessage(), 'Cannot access uninitialized non-nullable property')) {
throw $e;
}
try {
if (null === $scope) {
$this->$name = [];
return $this->$name;
}
$accessor['set']($this, $name, []);
return $accessor['get']($this, $name, null !== $readonlyScope);
} catch (\Error) {
throw $e;
}
}
}
public function __set($name, $value): void
{
$propertyScopes = Hydrator::$propertyScopes[$this::class] ??= Hydrator::getPropertyScopes($this::class);
$scope = null;
if ([$class, , $readonlyScope] = $propertyScopes[$name] ?? null) {
$scope = Registry::getScope($propertyScopes, $class, $name, $readonlyScope);
$state = $this->lazyObjectState ?? null;
if ($state && ($readonlyScope === $scope || isset($propertyScopes["\0$scope\0$name"]))) {
if (LazyObjectState::STATUS_UNINITIALIZED_FULL === $state->status) {
$state->initialize($this, $name, $readonlyScope ?? $scope);
}
goto set_in_scope;
}
}
if ((Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['set']) {
parent::__set($name, $value);
return;
}
set_in_scope:
if (null === $scope) {
$this->$name = $value;
} else {
$accessor = Registry::$classAccessors[$scope] ??= Registry::getClassAccessors($scope);
$accessor['set']($this, $name, $value);
}
}
public function __isset($name): bool
{
$propertyScopes = Hydrator::$propertyScopes[$this::class] ??= Hydrator::getPropertyScopes($this::class);
$scope = null;
if ([$class, , $readonlyScope] = $propertyScopes[$name] ?? null) {
$scope = Registry::getScope($propertyScopes, $class, $name);
$state = $this->lazyObjectState ?? null;
if ($state && (null === $scope || isset($propertyScopes["\0$scope\0$name"]))
&& LazyObjectState::STATUS_UNINITIALIZED_PARTIAL !== $state->initialize($this, $name, $readonlyScope ?? $scope)
) {
goto isset_in_scope;
}
}
if ((Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['isset']) {
return parent::__isset($name);
}
isset_in_scope:
if (null === $scope) {
return isset($this->$name);
}
$accessor = Registry::$classAccessors[$scope] ??= Registry::getClassAccessors($scope);
return $accessor['isset']($this, $name);
}
public function __unset($name): void
{
$propertyScopes = Hydrator::$propertyScopes[$this::class] ??= Hydrator::getPropertyScopes($this::class);
$scope = null;
if ([$class, , $readonlyScope] = $propertyScopes[$name] ?? null) {
$scope = Registry::getScope($propertyScopes, $class, $name, $readonlyScope);
$state = $this->lazyObjectState ?? null;
if ($state && ($readonlyScope === $scope || isset($propertyScopes["\0$scope\0$name"]))) {
if (LazyObjectState::STATUS_UNINITIALIZED_FULL === $state->status) {
$state->initialize($this, $name, $readonlyScope ?? $scope);
}
goto unset_in_scope;
}
}
if ((Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['unset']) {
parent::__unset($name);
return;
}
unset_in_scope:
if (null === $scope) {
unset($this->$name);
} else {
$accessor = Registry::$classAccessors[$scope] ??= Registry::getClassAccessors($scope);
$accessor['unset']($this, $name);
}
}
public function __clone(): void
{
if ($state = $this->lazyObjectState ?? null) {
$this->lazyObjectState = clone $state;
}
if ((Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['clone']) {
parent::__clone();
}
}
public function __serialize(): array
{
$class = self::class;
if ((Registry::$parentMethods[$class] ??= Registry::getParentMethods($class))['serialize']) {
$properties = parent::__serialize();
} else {
$this->initializeLazyObject();
$properties = (array) $this;
}
unset($properties["\0$class\0lazyObjectState"]);
if (Registry::$parentMethods[$class]['serialize'] || !Registry::$parentMethods[$class]['sleep']) {
return $properties;
}
$scope = get_parent_class($class);
$data = [];
foreach (parent::__sleep() as $name) {
$value = $properties[$k = $name] ?? $properties[$k = "\0*\0$name"] ?? $properties[$k = "\0$scope\0$name"] ?? $k = null;
if (null === $k) {
trigger_error(sprintf('serialize(): "%s" returned as member variable from __sleep() but does not exist', $name), \E_USER_NOTICE);
} else {
$data[$k] = $value;
}
}
return $data;
}
public function __destruct()
{
$state = $this->lazyObjectState ?? null;
if ($state && \in_array($state->status, [LazyObjectState::STATUS_UNINITIALIZED_FULL, LazyObjectState::STATUS_UNINITIALIZED_PARTIAL], true)) {
return;
}
if ((Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['destruct']) {
parent::__destruct();
}
}
private function setLazyObjectAsInitialized(bool $initialized): void
{
$state = $this->lazyObjectState ?? null;
if ($state && !\is_array($state->initializer)) {
$state->status = $initialized ? LazyObjectState::STATUS_INITIALIZED_FULL : LazyObjectState::STATUS_UNINITIALIZED_FULL;
}
}
}

vendor/symfony/var-exporter/LazyGhostTrait.php line 166