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<?php
declare(strict_types=1);
namespace GraphQL\Executor;
use ArrayAccess;
use Closure;
use GraphQL\Executor\Promise\Adapter\SyncPromiseAdapter;
use GraphQL\Executor\Promise\Promise;
use GraphQL\Executor\Promise\PromiseAdapter;
use GraphQL\Language\AST\DocumentNode;
use GraphQL\Type\Definition\ResolveInfo;
use GraphQL\Type\Schema;
use function is_array;
use function is_object;
/**
* Implements the "Evaluating requests" section of the GraphQL specification.
*/
class Executor
{
/** @var callable */
private static $defaultFieldResolver = [self::class, 'defaultFieldResolver'];
/** @var PromiseAdapter */
private static $defaultPromiseAdapter;
/** @var callable */
private static $implementationFactory = [ReferenceExecutor::class, 'create'];
public static function getDefaultFieldResolver() : callable
{
return self::$defaultFieldResolver;
}
/**
* Set a custom default resolve function.
*/
public static function setDefaultFieldResolver(callable $fieldResolver)
{
self::$defaultFieldResolver = $fieldResolver;
}
public static function getPromiseAdapter() : PromiseAdapter
{
return self::$defaultPromiseAdapter ?? (self::$defaultPromiseAdapter = new SyncPromiseAdapter());
}
/**
* Set a custom default promise adapter.
*/
public static function setPromiseAdapter(?PromiseAdapter $defaultPromiseAdapter = null)
{
self::$defaultPromiseAdapter = $defaultPromiseAdapter;
}
public static function getImplementationFactory() : callable
{
return self::$implementationFactory;
}
/**
* Set a custom executor implementation factory.
*/
public static function setImplementationFactory(callable $implementationFactory)
{
self::$implementationFactory = $implementationFactory;
}
/**
* Executes DocumentNode against given $schema.
*
* Always returns ExecutionResult and never throws.
* All errors which occur during operation execution are collected in `$result->errors`.
*
* @param mixed|null $rootValue
* @param mixed|null $contextValue
* @param array<mixed>|ArrayAccess|null $variableValues
* @param string|null $operationName
*
* @return ExecutionResult|Promise
*
* @api
*/
public static function execute(
Schema $schema,
DocumentNode $documentNode,
$rootValue = null,
$contextValue = null,
$variableValues = null,
$operationName = null,
?callable $fieldResolver = null
) {
// TODO: deprecate (just always use SyncAdapter here) and have `promiseToExecute()` for other cases
$promiseAdapter = static::getPromiseAdapter();
$result = static::promiseToExecute(
$promiseAdapter,
$schema,
$documentNode,
$rootValue,
$contextValue,
$variableValues,
$operationName,
$fieldResolver
);
if ($promiseAdapter instanceof SyncPromiseAdapter) {
$result = $promiseAdapter->wait($result);
}
return $result;
}
/**
* Same as execute(), but requires promise adapter and returns a promise which is always
* fulfilled with an instance of ExecutionResult and never rejected.
*
* Useful for async PHP platforms.
*
* @param mixed|null $rootValue
* @param mixed|null $contextValue
* @param array<mixed>|null $variableValues
* @param string|null $operationName
*
* @return Promise
*
* @api
*/
public static function promiseToExecute(
PromiseAdapter $promiseAdapter,
Schema $schema,
DocumentNode $documentNode,
$rootValue = null,
$contextValue = null,
$variableValues = null,
$operationName = null,
?callable $fieldResolver = null
) {
$factory = self::$implementationFactory;
/** @var ExecutorImplementation $executor */
$executor = $factory(
$promiseAdapter,
$schema,
$documentNode,
$rootValue,
$contextValue,
$variableValues,
$operationName,
$fieldResolver ?? self::$defaultFieldResolver
);
return $executor->doExecute();
}
/**
* If a resolve function is not given, then a default resolve behavior is used
* which takes the property of the root value of the same name as the field
* and returns it as the result, or if it's a function, returns the result
* of calling that function while passing along args and context.
*
* @param mixed $objectValue
* @param array<string, mixed> $args
* @param mixed|null $contextValue
*
* @return mixed|null
*/
public static function defaultFieldResolver($objectValue, $args, $contextValue, ResolveInfo $info)
{
$fieldName = $info->fieldName;
$property = null;
if (is_array($objectValue) || $objectValue instanceof ArrayAccess) {
if (isset($objectValue[$fieldName])) {
$property = $objectValue[$fieldName];
}
} elseif (is_object($objectValue)) {
if (isset($objectValue->{$fieldName})) {
$property = $objectValue->{$fieldName};
}
}
return $property instanceof Closure
? $property($objectValue, $args, $contextValue, $info)
: $property;
}
}

vendor/webonyx/graphql-php/src/Executor/Executor.php line 132