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<?php
declare(strict_types=1);
namespace Yiisoft\Yii\Cycle\Schema\Provider\Support;
use RuntimeException;
use Yiisoft\Yii\Cycle\Schema\SchemaProviderInterface;
/**
* A class for working with a group of schema providers.
* When the schema is read, it queues the specified schema providers using the {@see DeferredSchemaProviderDecorator}.
*/
final class SchemaProviderPipeline extends BaseProviderCollector
{
public function read(?SchemaProviderInterface $nextProvider = null): ?array
if ($this->providers === null) {
throw new RuntimeException(self::class . ' is not configured.');
}
if ($this->providers->count() === 0) {
return $nextProvider === null ? null : $nextProvider->read();
return $this->providers[0]->read($nextProvider);
yiisoft /
yii-cycle
