{

public const STATUS_UNKNOWN = 1;

public const STATUS_SYNCHRONIZED = 2;

public const STATUS_FAILED_TRANSFORMATION = 3;

public const STATUS_FAILED_SAVING = 4;

/** @var int */

public $status = self::STATUS_UNKNOWN;

/** @var object|null */

public $source;

/** @var \Throwable|null $error */

public $error;

private $type;

private $id;

private $body;

public function __construct(string $type = null, string $id = null, array $body = [])

{

$this->type = $type;

$this->id = $id;

$this->body = $body;

}

public function getType(): ?string

{

return $this->type;

}

public function getId(): ?string

{

return $this->id;

}

public function getBody(): array

{

return $this->body;

}

public function toProjection(): ProjectionInterface

{

if (null === $this->type) {

throw new \LogicException('Document type not set.');

}

if (!is_subclass_of($this->type, ProjectionInterface::class)) {

throw new \LogicException(sprintf('Document type must be a sub class of "%s", got "%s".', ProjectionInterface::class, $this->type));

}

return $this->type::fromDocument($this->body);

}