QueryResult.php

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

use TYPO3\CMS\Extbase\Persistence\QueryResultInterface;

class QueryResult implements QueryResultInterface {

    protected $dataMapper;

    protected $persistenceManager;

    protected $numberOfResults;

    protected $query;

    protected $queryResult;

    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');
        $this->persistenceManager = $objectManager->get('TYPO3\\CMS\\Extbase\\Persistence\\PersistenceManagerInterface');
        $this->dataMapper = $objectManager->get('TYPO3\\CMS\\Extbase\\Persistence\\Generic\\Mapper\\DataMapper');
    }

    public function __sleep() {
        return array('query');
    }
}