<?php
declare(strict_types=1);
namespace Doctrine\ORM\Query\Expr;
use function count;
use function implode;
/**
* Expression class for building DQL Order By parts.
*
* @link www.doctrine-project.org
*/
class OrderBy
{
/** @var string */
protected $preSeparator = '';
/** @var string */
protected $separator = ', ';
/** @var string */
protected $postSeparator = '';
/** @var string[] */
protected $allowedClasses = [];
/** @psalm-var list<string> */
protected $parts = [];
/**
* @param string|null $sort
* @param string|null $order
*/
public function __construct($sort = null, $order = null)
{
if ($sort) {
$this->add($sort, $order);
}
}
/**
* @param string $sort
* @param string|null $order
*
* @return void
*/
public function add($sort, $order = null)
{
$order = ! $order ? 'ASC' : $order;
$this->parts[] = $sort . ' ' . $order;
}
/**
* @return int
* @psalm-return 0|positive-int
*/
public function count()
{
return count($this->parts);
}
/** @psalm-return list<string> */
public function getParts()
{
return $this->parts;
}
/** @return string */
public function __toString()
{
return $this->preSeparator . implode($this->separator, $this->parts) . $this->postSeparator;
}
}