vendor/symfony/var-exporter/ProxyHelper.php line 216
<?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\Exception\LogicException;use Symfony\Component\VarExporter\Internal\Hydrator;use Symfony\Component\VarExporter\Internal\LazyObjectRegistry;/*** @author Nicolas Grekas <p@tchwork.com>*/final class ProxyHelper{/*** Helps generate lazy-loading ghost objects.** @throws LogicException When the class is incompatible with ghost objects*/public static function generateLazyGhost(\ReflectionClass $class): string{if (\PHP_VERSION_ID >= 80200 && \PHP_VERSION_ID < 80300 && $class->isReadOnly()) {throw new LogicException(sprintf('Cannot generate lazy ghost: class "%s" is readonly.', $class->name));}if ($class->isFinal()) {throw new LogicException(sprintf('Cannot generate lazy ghost: class "%s" is final.', $class->name));}if ($class->isInterface() || $class->isAbstract()) {throw new LogicException(sprintf('Cannot generate lazy ghost: "%s" is not a concrete class.', $class->name));}if (\stdClass::class !== $class->name && $class->isInternal()) {throw new LogicException(sprintf('Cannot generate lazy ghost: class "%s" is internal.', $class->name));}if ($class->hasMethod('__get') && 'mixed' !== (self::exportType($class->getMethod('__get')) ?? 'mixed')) {throw new LogicException(sprintf('Cannot generate lazy ghost: return type of method "%s::__get()" should be "mixed".', $class->name));}static $traitMethods;$traitMethods ??= (new \ReflectionClass(LazyGhostTrait::class))->getMethods();foreach ($traitMethods as $method) {if ($class->hasMethod($method->name) && $class->getMethod($method->name)->isFinal()) {throw new LogicException(sprintf('Cannot generate lazy ghost: method "%s::%s()" is final.', $class->name, $method->name));}}$parent = $class;while ($parent = $parent->getParentClass()) {if (\stdClass::class !== $parent->name && $parent->isInternal()) {throw new LogicException(sprintf('Cannot generate lazy ghost: class "%s" extends "%s" which is internal.', $class->name, $parent->name));}}$propertyScopes = self::exportPropertyScopes($class->name);return <<<EOPHPextends \\{$class->name} implements \Symfony\Component\VarExporter\LazyObjectInterface{use \Symfony\Component\VarExporter\LazyGhostTrait;private const LAZY_OBJECT_PROPERTY_SCOPES = {$propertyScopes};}// Help opcache.preload discover always-needed symbolsclass_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);EOPHP;}/*** Helps generate lazy-loading virtual proxies.** @param \ReflectionClass[] $interfaces** @throws LogicException When the class is incompatible with virtual proxies*/public static function generateLazyProxy(?\ReflectionClass $class, array $interfaces = []): string{if (!class_exists($class?->name ?? \stdClass::class, false)) {throw new LogicException(sprintf('Cannot generate lazy proxy: "%s" is not a class.', $class->name));}if ($class?->isFinal()) {throw new LogicException(sprintf('Cannot generate lazy proxy: class "%s" is final.', $class->name));}if (\PHP_VERSION_ID >= 80200 && \PHP_VERSION_ID < 80300 && $class?->isReadOnly()) {throw new LogicException(sprintf('Cannot generate lazy proxy: class "%s" is readonly.', $class->name));}$methodReflectors = [$class?->getMethods(\ReflectionMethod::IS_PUBLIC | \ReflectionMethod::IS_PROTECTED) ?? []];foreach ($interfaces as $interface) {if (!$interface->isInterface()) {throw new LogicException(sprintf('Cannot generate lazy proxy: "%s" is not an interface.', $interface->name));}$methodReflectors[] = $interface->getMethods();}$methodReflectors = array_merge(...$methodReflectors);$extendsInternalClass = false;if ($parent = $class) {do {$extendsInternalClass = \stdClass::class !== $parent->name && $parent->isInternal();} while (!$extendsInternalClass && $parent = $parent->getParentClass());}$methodsHaveToBeProxied = $extendsInternalClass;$methods = [];foreach ($methodReflectors as $method) {if ('__get' !== strtolower($method->name) || 'mixed' === ($type = self::exportType($method) ?? 'mixed')) {continue;}$methodsHaveToBeProxied = true;$trait = new \ReflectionMethod(LazyProxyTrait::class, '__get');$body = \array_slice(file($trait->getFileName()), $trait->getStartLine() - 1, $trait->getEndLine() - $trait->getStartLine());$body[0] = str_replace('): mixed', '): '.$type, $body[0]);$methods['__get'] = strtr(implode('', $body).' }', ['Hydrator' => '\\'.Hydrator::class,'Registry' => '\\'.LazyObjectRegistry::class,]);break;}foreach ($methodReflectors as $method) {if (($method->isStatic() && !$method->isAbstract()) || isset($methods[$lcName = strtolower($method->name)])) {continue;}if ($method->isFinal()) {if ($extendsInternalClass || $methodsHaveToBeProxied || method_exists(LazyProxyTrait::class, $method->name)) {throw new LogicException(sprintf('Cannot generate lazy proxy: method "%s::%s()" is final.', $class->name, $method->name));}continue;}if (method_exists(LazyProxyTrait::class, $method->name) || ($method->isProtected() && !$method->isAbstract())) {continue;}$signature = self::exportSignature($method, true, $args);$parentCall = $method->isAbstract() ? "throw new \BadMethodCallException('Cannot forward abstract method \"{$method->class}::{$method->name}()\".')" : "parent::{$method->name}({$args})";if ($method->isStatic()) {$body = " $parentCall;";} elseif (str_ends_with($signature, '): never') || str_ends_with($signature, '): void')) {$body = <<<EOPHPif (isset(\$this->lazyObjectState)) {(\$this->lazyObjectState->realInstance ??= (\$this->lazyObjectState->initializer)())->{$method->name}({$args});} else {{$parentCall};}EOPHP;} else {if (!$methodsHaveToBeProxied && !$method->isAbstract()) {// Skip proxying methods that might return $thisforeach (preg_split('/[()|&]++/', self::exportType($method) ?? 'static') as $type) {if (\in_array($type = ltrim($type, '?'), ['static', 'object'], true)) {continue 2;}foreach ([$class, ...$interfaces] as $r) {if ($r && is_a($r->name, $type, true)) {continue 3;}}}}$body = <<<EOPHPif (isset(\$this->lazyObjectState)) {return (\$this->lazyObjectState->realInstance ??= (\$this->lazyObjectState->initializer)())->{$method->name}({$args});}return {$parentCall};EOPHP;}$methods[$lcName] = " {$signature}\n {\n{$body}\n }";}$types = $interfaces = array_unique(array_column($interfaces, 'name'));$interfaces[] = LazyObjectInterface::class;$interfaces = implode(', \\', $interfaces);$parent = $class ? ' extends \\'.$class->name : '';array_unshift($types, $class ? 'parent' : '');$type = ltrim(implode('&\\', $types), '&');if (!$class) {$trait = new \ReflectionMethod(LazyProxyTrait::class, 'initializeLazyObject');$body = \array_slice(file($trait->getFileName()), $trait->getStartLine() - 1, $trait->getEndLine() - $trait->getStartLine());$body[0] = str_replace('): parent', '): '.$type, $body[0]);$methods = ['initializeLazyObject' => implode('', $body).' }'] + $methods;}$body = $methods ? "\n".implode("\n\n", $methods)."\n" : '';$propertyScopes = $class ? self::exportPropertyScopes($class->name) : '[]';return <<<EOPHP{$parent} implements \\{$interfaces}{use \Symfony\Component\VarExporter\LazyProxyTrait;private const LAZY_OBJECT_PROPERTY_SCOPES = {$propertyScopes};{$body}}// Help opcache.preload discover always-needed symbolsclass_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);EOPHP;}public static function exportSignature(\ReflectionFunctionAbstract $function, bool $withParameterTypes = true, string &$args = null): string{$hasByRef = false;$args = '';$param = null;$parameters = [];foreach ($function->getParameters() as $param) {$parameters[] = ($param->getAttributes(\SensitiveParameter::class) ? '#[\SensitiveParameter] ' : '').($withParameterTypes && $param->hasType() ? self::exportType($param).' ' : '').($param->isPassedByReference() ? '&' : '').($param->isVariadic() ? '...' : '').'$'.$param->name.($param->isOptional() && !$param->isVariadic() ? ' = '.self::exportDefault($param) : '');$hasByRef = $hasByRef || $param->isPassedByReference();$args .= ($param->isVariadic() ? '...$' : '$').$param->name.', ';}if (!$param || !$hasByRef) {$args = '...\func_get_args()';} elseif ($param->isVariadic()) {$args = substr($args, 0, -2);} else {$args .= sprintf('...\array_slice(\func_get_args(), %d)', \count($parameters));}$signature = 'function '.($function->returnsReference() ? '&' : '').($function->isClosure() ? '' : $function->name).'('.implode(', ', $parameters).')';if ($function instanceof \ReflectionMethod) {$signature = ($function->isPublic() ? 'public ' : ($function->isProtected() ? 'protected ' : 'private ')).($function->isStatic() ? 'static ' : '').$signature;}if ($function->hasReturnType()) {$signature .= ': '.self::exportType($function);}static $getPrototype;$getPrototype ??= (new \ReflectionMethod(\ReflectionMethod::class, 'getPrototype'))->invoke(...);while ($function) {if ($function->hasTentativeReturnType()) {return '#[\ReturnTypeWillChange] '.$signature;}try {$function = $function instanceof \ReflectionMethod && $function->isAbstract() ? false : $getPrototype($function);} catch (\ReflectionException) {break;}}return $signature;}public static function exportType(\ReflectionFunctionAbstract|\ReflectionProperty|\ReflectionParameter $owner, bool $noBuiltin = false, \ReflectionType $type = null): ?string{if (!$type ??= $owner instanceof \ReflectionFunctionAbstract ? $owner->getReturnType() : $owner->getType()) {return null;}$class = null;$types = [];if ($type instanceof \ReflectionUnionType) {$reflectionTypes = $type->getTypes();$glue = '|';} elseif ($type instanceof \ReflectionIntersectionType) {$reflectionTypes = $type->getTypes();$glue = '&';} else {$reflectionTypes = [$type];$glue = null;}foreach ($reflectionTypes as $type) {if ($type instanceof \ReflectionIntersectionType) {if ('' !== $name = '('.self::exportType($owner, $noBuiltin, $type).')') {$types[] = $name;}continue;}$name = $type->getName();if ($noBuiltin && $type->isBuiltin()) {continue;}if (\in_array($name, ['parent', 'self'], true) && $class ??= $owner->getDeclaringClass()) {$name = 'parent' === $name ? ($class->getParentClass() ?: null)?->name ?? 'parent' : $class->name;}$types[] = ($noBuiltin || $type->isBuiltin() || 'static' === $name ? '' : '\\').$name;}if (!$types) {return '';}if (null === $glue) {return (!$noBuiltin && $type->allowsNull() && 'mixed' !== $name ? '?' : '').$types[0];}sort($types);return implode($glue, $types);}private static function exportPropertyScopes(string $parent): string{$propertyScopes = Hydrator::$propertyScopes[$parent] ??= Hydrator::getPropertyScopes($parent);uksort($propertyScopes, 'strnatcmp');$propertyScopes = VarExporter::export($propertyScopes);$propertyScopes = str_replace(VarExporter::export($parent), 'parent::class', $propertyScopes);$propertyScopes = preg_replace("/(?|(,)\n( ) |\n |,\n (\]))/", '$1$2', $propertyScopes);$propertyScopes = str_replace("\n", "\n ", $propertyScopes);return $propertyScopes;}private static function exportDefault(\ReflectionParameter $param): string{$default = rtrim(substr(explode('$'.$param->name.' = ', (string) $param, 2)[1] ?? '', 0, -2));if (\in_array($default, ['<default>', 'NULL'], true)) {return 'null';}if (str_ends_with($default, "...'") && preg_match("/^'(?:[^'\\\\]*+(?:\\\\.)*+)*+'$/", $default)) {return VarExporter::export($param->getDefaultValue());}$regexp = "/(\"(?:[^\"\\\\]*+(?:\\\\.)*+)*+\"|'(?:[^'\\\\]*+(?:\\\\.)*+)*+')/";$parts = preg_split($regexp, $default, -1, \PREG_SPLIT_DELIM_CAPTURE | \PREG_SPLIT_NO_EMPTY);$regexp = '/([\[\( ]|^)([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\\\\[a-zA-Z0-9_\x7f-\xff]++)*+)(?!: )/';$callback = (false !== strpbrk($default, "\\:('") && $class = $param->getDeclaringClass())? fn ($m) => $m[1].match ($m[2]) {'new', 'false', 'true', 'null' => $m[2],'NULL' => 'null','self' => '\\'.$class->name,'namespace\\parent','parent' => ($parent = $class->getParentClass()) ? '\\'.$parent->name : 'parent',default => '\\'.$m[2],}: fn ($m) => $m[1].match ($m[2]) {'new', 'false', 'true', 'null', 'self', 'parent' => $m[2],'NULL' => 'null',default => '\\'.$m[2],};return implode('', array_map(fn ($part) => match ($part[0]) {'"' => $part, // for internal classes only"'" => false !== strpbrk($part, "\\\0\r\n") ? '"'.substr(str_replace(['$', "\0", "\r", "\n"], ['\$', '\0', '\r', '\n'], $part), 1, -1).'"' : $part,default => preg_replace_callback($regexp, $callback, $part),}, $parts));}}