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<?php
/**
* SchemaVersion.php - schema version interface for migrations
*
* This interface provides an abstract way to retrieve and set the current
* version of a schema. Implementations of this interface need to define
* where the version information is actually stored (e.g. in a file).
*
* @author Marcus Lunzenauer <mlunzena@uos.de>
* @copyright 2007 - Marcus Lunzenauer <mlunzena@uos.de>
* @license GPL2 or any later version
* @package migrations
*/
interface SchemaVersion
{
/**
* Retrieve the branch of this schema.
*
* @return string schema branch
*/
public function getBranch();
/**
* Retrieve all branches of this schema.
*
* @return array all schema branches
*/
public function getAllBranches();
/**
* Returns current schema version.
*
* @param string $branch schema branch (optional)
* @return int schema version
*/
public function get($branch = 0);
/**
* Sets the new schema version.
*
* @param int $version new schema version
* @param string $branch schema branch (optional)
*/
public function set($version, $branch = 0);
}
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