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<?php
/**
* Bitrix Framework
* @package bitrix
* @subpackage main
* @copyright 2001-2017 Bitrix
*/
namespace Bitrix\Main\ORM\Query;
use Bitrix\Main\ArgumentException;
use Bitrix\Main\DB\SqlExpression;
/**
* UNION container to be used in Query.
*
* @package bitrix
* @subpackage main
*/
class UnionCondition
{
/** @var Query|SqlExpression */
protected $subQuery;
/** @var bool */
protected $all;
/**
* @param Query|SqlExpression $subQuery
* @param bool $unionAll
*
* @throws ArgumentException
*/
public function __construct($subQuery, $unionAll = false)
{
if (!($subQuery instanceof Query) && !($subQuery instanceof SqlExpression))
{
throw new ArgumentException("Query or SqlExpression expected, `".gettype($subQuery)."` found.");
}
$this->subQuery = $subQuery;
$this->all = $unionAll;
}
/**
* @return SqlExpression|Query
*/
public function getSubQuery()
{
return $this->subQuery;
}
/**
* @param SqlExpression|Query $subQuery
*/
public function setSubQuery($subQuery)
{
$this->subQuery = $subQuery;
}
/**
* @return bool
*/
public function isAll()
{
return $this->all;
}
/**
* @param bool $all
*/
public function setAll($all)
{
$this->all = $all;
}
/**
* @return string
*/
public function getSql()
{
$sql = "UNION ";
if ($this->all)
{
$sql .= "ALL ";
}
return $sql."({$this->getSubQuerySql()})";
}
/**
* @return string
*/
public function getSubQuerySql()
{
if ($this->subQuery instanceof Query)
{
return $this->subQuery->getQuery();
}
elseif ($this->subQuery instanceof SqlExpression)
{
return $this->subQuery->compile();
}
return null;
}
}
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