348 lines
12 KiB
PHP
348 lines
12 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\VarExporter;
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use Symfony\Component\VarExporter\Hydrator as PublicHydrator;
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use Symfony\Component\VarExporter\Internal\Hydrator;
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use Symfony\Component\VarExporter\Internal\LazyObjectRegistry as Registry;
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use Symfony\Component\VarExporter\Internal\LazyObjectState;
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use Symfony\Component\VarExporter\Internal\LazyObjectTrait;
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trait LazyProxyTrait
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{
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use LazyObjectTrait;
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/**
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* Creates a lazy-loading virtual proxy.
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*
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* @param \Closure():object $initializer Returns the proxied object
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* @param static|null $instance
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*/
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public static function createLazyProxy(\Closure $initializer, object $instance = null): static
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{
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if (self::class !== $class = $instance ? $instance::class : static::class) {
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$skippedProperties = ["\0".self::class."\0lazyObjectState" => true];
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} elseif (\defined($class.'::LAZY_OBJECT_PROPERTY_SCOPES')) {
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Hydrator::$propertyScopes[$class] ??= $class::LAZY_OBJECT_PROPERTY_SCOPES;
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}
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$instance ??= (Registry::$classReflectors[$class] ??= new \ReflectionClass($class))->newInstanceWithoutConstructor();
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$instance->lazyObjectState = new LazyObjectState($initializer);
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foreach (Registry::$classResetters[$class] ??= Registry::getClassResetters($class) as $reset) {
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$reset($instance, $skippedProperties ??= []);
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}
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return $instance;
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}
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/**
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* Returns whether the object is initialized.
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*
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* @param $partial Whether partially initialized objects should be considered as initialized
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*/
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public function isLazyObjectInitialized(bool $partial = false): bool
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{
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return !isset($this->lazyObjectState) || isset($this->lazyObjectState->realInstance) || Registry::$noInitializerState === $this->lazyObjectState->initializer;
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}
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/**
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* Forces initialization of a lazy object and returns it.
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*/
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public function initializeLazyObject(): parent
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{
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if ($state = $this->lazyObjectState ?? null) {
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return $state->realInstance ??= ($state->initializer)();
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}
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return $this;
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}
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/**
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* @return bool Returns false when the object cannot be reset, ie when it's not a lazy object
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*/
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public function resetLazyObject(): bool
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{
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if (!isset($this->lazyObjectState) || Registry::$noInitializerState === $this->lazyObjectState->initializer) {
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return false;
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}
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unset($this->lazyObjectState->realInstance);
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return true;
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}
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public function &__get($name): mixed
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{
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$propertyScopes = Hydrator::$propertyScopes[$this::class] ??= Hydrator::getPropertyScopes($this::class);
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$scope = null;
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$instance = $this;
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if ([$class, , $readonlyScope] = $propertyScopes[$name] ?? null) {
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$scope = Registry::getScope($propertyScopes, $class, $name);
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if (null === $scope || isset($propertyScopes["\0$scope\0$name"])) {
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if ($state = $this->lazyObjectState ?? null) {
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$instance = $state->realInstance ??= ($state->initializer)();
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}
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$parent = 2;
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goto get_in_scope;
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}
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}
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$parent = (Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['get'];
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if ($state = $this->lazyObjectState ?? null) {
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$instance = $state->realInstance ??= ($state->initializer)();
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} else {
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if (2 === $parent) {
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return parent::__get($name);
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}
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$value = parent::__get($name);
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return $value;
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}
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if (!$parent && null === $class && !\array_key_exists($name, (array) $instance)) {
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$frame = debug_backtrace(\DEBUG_BACKTRACE_IGNORE_ARGS, 1)[0];
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trigger_error(sprintf('Undefined property: %s::$%s in %s on line %s', $instance::class, $name, $frame['file'], $frame['line']), \E_USER_NOTICE);
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}
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get_in_scope:
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try {
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if (null === $scope) {
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if (null === $readonlyScope && 1 !== $parent) {
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return $instance->$name;
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}
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$value = $instance->$name;
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return $value;
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}
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$accessor = Registry::$classAccessors[$scope] ??= Registry::getClassAccessors($scope);
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return $accessor['get']($instance, $name, null !== $readonlyScope || 1 === $parent);
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} catch (\Error $e) {
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if (\Error::class !== $e::class || !str_starts_with($e->getMessage(), 'Cannot access uninitialized non-nullable property')) {
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throw $e;
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}
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try {
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if (null === $scope) {
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$instance->$name = [];
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return $instance->$name;
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}
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$accessor['set']($instance, $name, []);
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return $accessor['get']($instance, $name, null !== $readonlyScope || 1 === $parent);
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} catch (\Error) {
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throw $e;
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}
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}
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}
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public function __set($name, $value): void
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{
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$propertyScopes = Hydrator::$propertyScopes[$this::class] ??= Hydrator::getPropertyScopes($this::class);
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$scope = null;
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$instance = $this;
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if ([$class, , $readonlyScope] = $propertyScopes[$name] ?? null) {
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$scope = Registry::getScope($propertyScopes, $class, $name, $readonlyScope);
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if ($readonlyScope === $scope || isset($propertyScopes["\0$scope\0$name"])) {
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if ($state = $this->lazyObjectState ?? null) {
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$instance = $state->realInstance ??= ($state->initializer)();
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}
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goto set_in_scope;
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}
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}
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if ($state = $this->lazyObjectState ?? null) {
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$instance = $state->realInstance ??= ($state->initializer)();
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} elseif ((Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['set']) {
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parent::__set($name, $value);
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return;
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}
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set_in_scope:
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if (null === $scope) {
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$instance->$name = $value;
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} else {
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$accessor = Registry::$classAccessors[$scope] ??= Registry::getClassAccessors($scope);
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$accessor['set']($instance, $name, $value);
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}
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}
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public function __isset($name): bool
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{
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$propertyScopes = Hydrator::$propertyScopes[$this::class] ??= Hydrator::getPropertyScopes($this::class);
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$scope = null;
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$instance = $this;
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if ([$class] = $propertyScopes[$name] ?? null) {
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$scope = Registry::getScope($propertyScopes, $class, $name);
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if (null === $scope || isset($propertyScopes["\0$scope\0$name"])) {
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if ($state = $this->lazyObjectState ?? null) {
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$instance = $state->realInstance ??= ($state->initializer)();
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}
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goto isset_in_scope;
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}
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}
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if ($state = $this->lazyObjectState ?? null) {
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$instance = $state->realInstance ??= ($state->initializer)();
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} elseif ((Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['isset']) {
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return parent::__isset($name);
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}
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isset_in_scope:
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if (null === $scope) {
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return isset($instance->$name);
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}
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$accessor = Registry::$classAccessors[$scope] ??= Registry::getClassAccessors($scope);
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return $accessor['isset']($instance, $name);
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}
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public function __unset($name): void
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{
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$propertyScopes = Hydrator::$propertyScopes[$this::class] ??= Hydrator::getPropertyScopes($this::class);
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$scope = null;
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$instance = $this;
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if ([$class, , $readonlyScope] = $propertyScopes[$name] ?? null) {
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$scope = Registry::getScope($propertyScopes, $class, $name, $readonlyScope);
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if ($readonlyScope === $scope || isset($propertyScopes["\0$scope\0$name"])) {
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if ($state = $this->lazyObjectState ?? null) {
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$instance = $state->realInstance ??= ($state->initializer)();
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}
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goto unset_in_scope;
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}
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}
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if ($state = $this->lazyObjectState ?? null) {
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$instance = $state->realInstance ??= ($state->initializer)();
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} elseif ((Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['unset']) {
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parent::__unset($name);
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return;
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}
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unset_in_scope:
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if (null === $scope) {
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unset($instance->$name);
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} else {
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$accessor = Registry::$classAccessors[$scope] ??= Registry::getClassAccessors($scope);
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$accessor['unset']($instance, $name);
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}
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}
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public function __clone(): void
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{
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if (!isset($this->lazyObjectState)) {
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if ((Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['clone']) {
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parent::__clone();
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}
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return;
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}
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$this->lazyObjectState = clone $this->lazyObjectState;
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if (isset($this->lazyObjectState->realInstance)) {
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$this->lazyObjectState->realInstance = clone $this->lazyObjectState->realInstance;
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}
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}
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public function __serialize(): array
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{
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$class = self::class;
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$state = $this->lazyObjectState ?? null;
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if (!$state && (Registry::$parentMethods[$class] ??= Registry::getParentMethods($class))['serialize']) {
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$properties = parent::__serialize();
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} else {
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$properties = (array) $this;
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if ($state) {
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unset($properties["\0$class\0lazyObjectState"]);
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$properties["\0$class\0lazyObjectReal"] = $state->realInstance ??= ($state->initializer)();
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}
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}
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if ($state || Registry::$parentMethods[$class]['serialize'] || !Registry::$parentMethods[$class]['sleep']) {
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return $properties;
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}
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$scope = get_parent_class($class);
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$data = [];
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foreach (parent::__sleep() as $name) {
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$value = $properties[$k = $name] ?? $properties[$k = "\0*\0$name"] ?? $properties[$k = "\0$scope\0$name"] ?? $k = null;
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if (null === $k) {
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trigger_error(sprintf('serialize(): "%s" returned as member variable from __sleep() but does not exist', $name), \E_USER_NOTICE);
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} else {
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$data[$k] = $value;
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}
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}
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return $data;
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}
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public function __unserialize(array $data): void
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{
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$class = self::class;
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if ($instance = $data["\0$class\0lazyObjectReal"] ?? null) {
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unset($data["\0$class\0lazyObjectReal"]);
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foreach (Registry::$classResetters[$class] ??= Registry::getClassResetters($class) as $reset) {
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$reset($this, $data);
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}
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if ($data) {
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PublicHydrator::hydrate($this, $data);
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}
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$this->lazyObjectState = new LazyObjectState(Registry::$noInitializerState ??= static fn () => throw new \LogicException('Lazy proxy has no initializer.'));
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$this->lazyObjectState->realInstance = $instance;
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} elseif ((Registry::$parentMethods[$class] ??= Registry::getParentMethods($class))['unserialize']) {
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parent::__unserialize($data);
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} else {
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PublicHydrator::hydrate($this, $data);
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if (Registry::$parentMethods[$class]['wakeup']) {
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parent::__wakeup();
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}
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}
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}
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public function __destruct()
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{
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if (isset($this->lazyObjectState)) {
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return;
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}
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if ((Registry::$parentMethods[self::class] ??= Registry::getParentMethods(self::class))['destruct']) {
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parent::__destruct();
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}
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}
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}
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