JoinGroup.php
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JoinGroup.php
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	<?php

	namespace Wikimedia\Rdbms;

	/**
	* Parenthesized group of table names and their join types and conditions.
	*
	* @internal
	*/
	class JoinGroup extends JoinGroupBase {
	/** @var string */
	private $alias;

	/** @var int */
	private $nextAutoAlias = 0;

	/**
	* Use SelectQueryBuilder::newJoinGroup() to create a join group
	*
	* @internal
	* @param string $alias
	*/
	public function __construct( $alias ) {
	$this->alias = $alias;
	}

	/**
	* Get a table alias which is unique to the parent SelectQueryBuilder
	*
	* @return string
	*/
	protected function getAutoAlias() {
	return $this->alias . '_' . ( $this->nextAutoAlias++ );
	}

	/**
	* @internal
	* @return array
	*/
	public function getRawTables() {
	return $this->tables;
	}

	/**
	* @internal
	* @return array
	*/
	public function getRawJoinConds() {
	return $this->joinConds;
	}

	/**
	* @internal
	* @return string
	*/
	public function getAlias() {
	return $this->alias;
	}
	}