QueryResult.php

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

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

use TYPO3\CMS\Extbase\Persistence\QueryResultInterface;

class QueryResult implements QueryResultInterface
{
    protected $dataMapper;

    protected $persistenceManager;

    protected $numberOfResults;

    protected $query;

    protected $queryResult;

    public function injectDataMapper(\TYPO3\CMS\Extbase\Persistence\Generic\Mapper\DataMapper $dataMapper)
    {
        $this->dataMapper = $dataMapper;
    }

    public function injectPersistenceManager(\TYPO3\CMS\Extbase\Persistence\PersistenceManagerInterface $persistenceManager)
    {
        $this->persistenceManager = $persistenceManager;
    }

    public function __construct(\TYPO3\CMS\Extbase\Persistence\QueryInterface $query)
    {
        $this->query = $query;
    }

    protected function initialize()
    {
        if (!is_array($this->queryResult)) {
            $this->queryResult = $this->dataMapper->map($this->query->getType(), $this->persistenceManager->getObjectDataByQuery($this->query));
        }
    }

    public function getQuery()
    {
        return clone $this->query;
    }

    public function getFirst()
    {
        if (is_array($this->queryResult)) {
            $queryResult = $this->queryResult;
            reset($queryResult);
        } else {
            $query = $this->getQuery();
            $query->setLimit(1);
            $queryResult = $this->dataMapper->map($query->getType(), $this->persistenceManager->getObjectDataByQuery($query));
        }
        $firstResult = current($queryResult);
        if ($firstResult === false) {
            $firstResult = null;
        }
        return $firstResult;
    }

    public function count()
    {
        if ($this->numberOfResults === null) {
            if (is_array($this->queryResult)) {
                $this->numberOfResults = count($this->queryResult);
            } else {
                $this->numberOfResults = $this->persistenceManager->getObjectCountByQuery($this->query);
            }
        }
        return $this->numberOfResults;
    }

    public function toArray()
    {
        $this->initialize();
        return iterator_to_array($this);
    }

    public function offsetExists($offset)
    {
        $this->initialize();
        return isset($this->queryResult[$offset]);
    }

    public function offsetGet($offset)
    {
        $this->initialize();
        return isset($this->queryResult[$offset]) ? $this->queryResult[$offset] : null;
    }

    public function offsetSet($offset, $value)
    {
        $this->initialize();
        $this->queryResult[$offset] = $value;
    }

    public function offsetUnset($offset)
    {
        $this->initialize();
        unset($this->queryResult[$offset]);
    }

    public function current()
    {
        $this->initialize();
        return current($this->queryResult);
    }

    public function key()
    {
        $this->initialize();
        return key($this->queryResult);
    }

    public function next()
    {
        $this->initialize();
        next($this->queryResult);
    }

    public function rewind()
    {
        $this->initialize();
        reset($this->queryResult);
    }

    public function valid()
    {
        $this->initialize();
        return current($this->queryResult) !== false;
    }

    public function __wakeup()
    {
        $objectManager = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Extbase\Object\ObjectManager::class);
        $this->persistenceManager = $objectManager->get(\TYPO3\CMS\Extbase\Persistence\PersistenceManagerInterface::class);
        $this->dataMapper = $objectManager->get(\TYPO3\CMS\Extbase\Persistence\Generic\Mapper\DataMapper::class);
    }

    public function __sleep()
    {
        return ['query'];
    }
}