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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of the Explicit Architecture POC, |
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* which is created on top of the Symfony Demo application. |
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* |
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* (c) Herberto Graça <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Acme\App\Core\Port\Persistence; |
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use Acme\App\Core\Port\Persistence\Exception\QueryServiceIsNotCallableException; |
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use Acme\App\Core\Port\Persistence\Exception\UnableToHandleQueryException; |
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/** |
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* This is the query service that will be used throughout the application, it's the entry point for querying. |
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* It will receive a query object and route it to one of the underlying query services, |
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* which is configured to handle that specific type of query objects. |
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*/ |
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final class QueryServiceRouter implements QueryServiceRouterInterface |
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{ |
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/** |
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* @var QueryServiceInterface|callable[] |
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*/ |
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private $queryServiceList = []; |
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public function __construct(QueryServiceInterface ...$queryServiceList) |
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{ |
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foreach ($queryServiceList as $queryService) { |
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$this->addQueryService($queryService); |
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} |
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} |
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public function query(QueryInterface $query): ResultCollectionInterface |
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{ |
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return $this->getQueryServiceFor($query)($query); |
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} |
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private function addQueryService(QueryServiceInterface $queryService): void |
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{ |
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if (!\is_callable($queryService)) { |
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throw new QueryServiceIsNotCallableException($queryService); |
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} |
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$this->queryServiceList[$queryService->canHandle()] = $queryService; |
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} |
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private function getQueryServiceFor(QueryInterface $query): QueryServiceInterface |
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{ |
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if (!$this->canHandle($query)) { |
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throw new UnableToHandleQueryException($query); |
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} |
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return $this->queryServiceList[\get_class($query)]; |
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} |
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private function canHandle(QueryInterface $query): bool |
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{ |
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return isset($this->queryServiceList[\get_class($query)]); |
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} |
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} |
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hgraca /
explicit-architecture-php
