daikon-cqrs/event-sourcing

<?php declare(strict_types=1);
/**
 * This file is part of the daikon-cqrs/event-sourcing project.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Daikon\EventSourcing\Aggregate;

use Daikon\Interop\SupportsAnnotations;

trait AnnotatesForAggregate
{
    use SupportsAnnotations;

    public function getAggregateId(): AggregateIdInterface
    {
        return $this->{static::getAnnotatedId()};
    }

    private static function getAnnotatedId(): string
    {
        return static::getAnnotation('id');
    }

    private static function getAnnotatedRevision(): string
    {
        return static::getAnnotation('rev');
    }

    private static function getAnnotation(string $key): string
    {
        //yield first seen
        return key(static::inferValueFactories($key));
    }
}