Repository: symfony/symfony
File: src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php (PHP)

Code before:
use Symfony\Component\Serializer\Exception\LogicException;
use Symfony\Component\Serializer\Exception\RuntimeException;
use Symfony\Component\Serializer\Exception\UnexpectedValueException;

/**
 * @author Jordi Boggiano <j.boggiano@seld.be>
 *
 * @method array getSupportedTypes(?string $format)
 */
interface DenormalizerInterface
{
    public const COLLECT_DENORMALIZATION_ERRORS = 'collect_denormalization_errors';

    /**
     * Denormalizes data back into an object of the given class.
     *
     * @template TObject of object
     *
     * @param mixed                        $data    Data to restore
     * @param class-string<TObject>|string $type    The expected class to instantiate
     * @param string|null                  $format  Format the given data was extracted from
     * @param array                        $context Options available to the denormalizer
     *
     * @psalm-return ($type is class-string<TObject> ? TObject : mixed)
     *
     * @return mixed
     *
     * @throws BadMethodCallException   Occurs when the normalizer is not called in an expected context
     * @throws InvalidArgumentException Occurs when the arguments are not coherent or not supported
     * @throws UnexpectedValueException Occurs when the item cannot be hydrated with the given data
     * @throws ExtraAttributesException Occurs when the item doesn't have attribute to receive given data
     * @throws LogicException           Occurs when the normalizer is not supposed to denormalize
     * @throws RuntimeException         Occurs if the class cannot be instantiated
     * @throws ExceptionInterface       Occurs for all the other cases of errors
     */
    public function denormalize(mixed $data, string $type, ?string $format = null, array $context = []);

    /**
     * Checks whether the given class is supported for denormalization by this normalizer.
     *
     * @param mixed       $data    Data to denormalize from
     * @param string      $type    The class to which the data should be denormalized
     * @param string|null $format  The format being deserialized from
     * @param array       $context Options available to the denormalizer
     *
     * @return bool
     */
    public function supportsDenormalization(mixed $data, string $type, ?string $format = null /* , array $context = [] */);

    /**
     * Returns the types potentially supported by this denormalizer.

Review comment (suggestion):
```suggestion
     * @return ($type is class-string<TObject> ? TObject : mixed)
```

Code after:
use Symfony\Component\Serializer\Exception\LogicException;
use Symfony\Component\Serializer\Exception\RuntimeException;
use Symfony\Component\Serializer\Exception\UnexpectedValueException;

/**
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
interface DenormalizerInterface
{
    public const COLLECT_DENORMALIZATION_ERRORS = 'collect_denormalization_errors';

    /**
     * Denormalizes data back into an object of the given class.
     *
     * @template TObject of object
     *
     * @param mixed                        $data    Data to restore
     * @param class-string<TObject>|string $type    The expected class to instantiate
     * @param string|null                  $format  Format the given data was extracted from
     * @param array<string, mixed>         $context Options available to the denormalizer
     *
     * @return ($type is class-string<TObject> ? TObject : mixed)
     *
     * @throws BadMethodCallException   Occurs when the normalizer is not called in an expected context
     * @throws InvalidArgumentException Occurs when the arguments are not coherent or not supported
     * @throws UnexpectedValueException Occurs when the item cannot be hydrated with the given data
     * @throws ExtraAttributesException Occurs when the item doesn't have attribute to receive given data
     * @throws LogicException           Occurs when the normalizer is not supposed to denormalize
     * @throws RuntimeException         Occurs if the class cannot be instantiated
     * @throws ExceptionInterface       Occurs for all the other cases of errors
     */
    public function denormalize(mixed $data, string $type, ?string $format = null, array $context = []): mixed;

    /**
     * Checks whether the given class is supported for denormalization by this normalizer.
     *
     * @param mixed                $data    Data to denormalize from
     * @param string               $type    The class to which the data should be denormalized
     * @param string|null          $format  The format being deserialized from
     * @param array<string, mixed> $context Options available to the denormalizer
     */
    public function supportsDenormalization(mixed $data, string $type, ?string $format = null, array $context = []): bool;

    /**
     * Returns the types potentially supported by this denormalizer.
     *
     * For each supported formats (if applicable), the supported types should be
     * returned as keys, and each type should be mapped to a boolean indicating
     * if the result of supportsDenormalization() can be cached or not
     * (a result cannot be cached when it depends on the context or on the data.)
     * A null value means that the denormalizer does not support the corresponding