ReportProvider.php

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<?php
namespace Magento\Analytics\ReportXml;

use Magento\Framework\Api\SearchCriteria;

class ReportProvider
{
    private $queryFactory;

    private $connectionFactory;

    private $iteratorFactory;

    public function __construct(
        QueryFactory $queryFactory,
        ConnectionFactory $connectionFactory,
        IteratorFactory $iteratorFactory
    ) {
        $this->queryFactory = $queryFactory;
        $this->connectionFactory = $connectionFactory;
        $this->iteratorFactory = $iteratorFactory;
    }

    private function getIteratorName(Query $query)
    {
        $config = $query->getConfig();
        return $config['iterator'] ?? null;
    }

    public function getReport($name)
    {
        $query = $this->queryFactory->create($name);
        $connection = $this->connectionFactory->getConnection($query->getConnectionName());
        $statement = $connection->query($query->getSelect());
        return $this->iteratorFactory->create($statement, $this->getIteratorName($query));
    }
}