QueryFactory.php

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<?php
namespace TYPO3\CMS\Extbase\Persistence\Generic;

class QueryFactory implements QueryFactoryInterface, \TYPO3\CMS\Core\SingletonInterface {

    protected $objectManager;

    protected $configurationManager;

    protected $dataMapper;

    public function create($className) {
        $query = $this->objectManager->get('TYPO3\\CMS\\Extbase\\Persistence\\QueryInterface', $className);
        $querySettings = $this->objectManager->get('TYPO3\\CMS\\Extbase\\Persistence\\Generic\\QuerySettingsInterface');

        $dataMap = $this->dataMapper->getDataMap($className);
        if ($dataMap->getIsStatic() || $dataMap->getRootLevel()) {
            $querySettings->setRespectStoragePage(FALSE);
        }

        $frameworkConfiguration = $this->configurationManager->getConfiguration(\TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface::CONFIGURATION_TYPE_FRAMEWORK);
        $querySettings->setStoragePageIds(\TYPO3\CMS\Core\Utility\GeneralUtility::intExplode(',', $frameworkConfiguration['persistence']['storagePid']));
        if ($querySettings instanceof Typo3QuerySettings) {
            $querySettings->useQueryCache($frameworkConfiguration['persistence']['useQueryCache']);
        }
        $query->setQuerySettings($querySettings);
        return $query;
    }
}