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<?php
declare(strict_types=1);
namespace Doctrine\ORM\Query\Expr;
use function implode;
use function is_object;
use function preg_match;
/**
* Expression class for building DQL and parts.
*
* @link www.doctrine-project.org
*/
class Composite extends Base
{
/** @return string */
public function __toString()
{
if ($this->count() === 1) {
return (string) $this->parts[0];
}
$components = [];
foreach ($this->parts as $part) {
$components[] = $this->processQueryPart($part);
}
return implode($this->separator, $components);
}
/** @param string|object $part */
private function processQueryPart($part): string
{
$queryPart = (string) $part;
if (is_object($part) && $part instanceof self && $part->count() > 1) {
return $this->preSeparator . $queryPart . $this->postSeparator;
}
// Fixes DDC-1237: User may have added a where item containing nested expression (with "OR" or "AND")
if (preg_match('/\s(OR|AND)\s/i', $queryPart)) {
return $this->preSeparator . $queryPart . $this->postSeparator;
}
return $queryPart;
}
}
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