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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\VarExporter\Internal;
/**
* Stores the state of lazy objects and caches related reflection information.
*
* As a micro-optimization, this class uses no type declarations.
*
* @internal
*/
class LazyObjectRegistry
{
/**
* @var array<class-string, \ReflectionClass>
*/
public static array $classReflectors = [];
/**
* @var array<class-string, array<string, mixed>>
*/
public static array $defaultProperties = [];
/**
* @var array<class-string, list<\Closure>>
*/
public static array $classResetters = [];
/**
* @var array<class-string, array{get: \Closure, set: \Closure, isset: \Closure, unset: \Closure}>
*/
public static array $classAccessors = [];
/**
* @var array<class-string, array{set: bool, isset: bool, unset: bool, clone: bool, serialize: bool, unserialize: bool, sleep: bool, wakeup: bool, destruct: bool, get: int}>
*/
public static array $parentMethods = [];
public static ?\Closure $noInitializerState = null;
public static function getClassResetters($class)
{
$classProperties = [];
if ((self::$classReflectors[$class] ??= new \ReflectionClass($class))->isInternal()) {
$propertyScopes = [];
} else {
$propertyScopes = Hydrator::$propertyScopes[$class] ??= Hydrator::getPropertyScopes($class);
}
foreach ($propertyScopes as $key => [$scope, $name, $readonlyScope]) {
$propertyScopes[$k = "\0$scope\0$name"] ?? $propertyScopes[$k = "\0*\0$name"] ?? $k = $name;
if ($k === $key && "\0$class\0lazyObjectState" !== $k) {
$classProperties[$readonlyScope ?? $scope][$name] = $key;
}
}
$resetters = [];
foreach ($classProperties as $scope => $properties) {
$resetters[] = \Closure::bind(static function ($instance, $skippedProperties) use ($properties) {
foreach ($properties as $name => $key) {
if (!\array_key_exists($key, $skippedProperties)) {
unset($instance->$name);
}
}
}, null, $scope);
}
return $resetters;
}
public static function getClassAccessors($class)
{
return \Closure::bind(static fn () => [
'get' => static function &($instance, $name, $readonly) {
if (!$readonly) {
return $instance->$name;
}
$value = $instance->$name;
return $value;
},
'set' => static function ($instance, $name, $value) {
$instance->$name = $value;
},
'isset' => static fn ($instance, $name) => isset($instance->$name),
'unset' => static function ($instance, $name) {
unset($instance->$name);
},
], null, \Closure::class === $class ? null : $class)();
}
public static function getParentMethods($class)
{
$parent = get_parent_class($class);
$methods = [];
foreach (['set', 'isset', 'unset', 'clone', 'serialize', 'unserialize', 'sleep', 'wakeup', 'destruct', 'get'] as $method) {
if (!$parent || !method_exists($parent, '__'.$method)) {
$methods[$method] = false;
} else {
$m = new \ReflectionMethod($parent, '__'.$method);
$methods[$method] = !$m->isAbstract() && !$m->isPrivate();
}
}
$methods['get'] = $methods['get'] ? ($m->returnsReference() ? 2 : 1) : 0;
return $methods;
}
public static function getScope($propertyScopes, $class, $property, $readonlyScope = null)
{
if (null === $readonlyScope && !isset($propertyScopes[$k = "\0$class\0$property"]) && !isset($propertyScopes[$k = "\0*\0$property"])) {
return null;
}
$frame = debug_backtrace(\DEBUG_BACKTRACE_PROVIDE_OBJECT | \DEBUG_BACKTRACE_IGNORE_ARGS, 3)[2];
if (\ReflectionProperty::class === $scope = $frame['class'] ?? \Closure::class) {
$scope = $frame['object']->class;
}
if (null === $readonlyScope && '*' === $k[1] && ($class === $scope || (is_subclass_of($class, $scope) && !isset($propertyScopes["\0$scope\0$property"])))) {
return null;
}
return $scope;
}
}
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