File core/environment/context/PersistenceContext.class.php
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<?php
/**
* This class manages all the environment services.
* It's able to create each of them and return them.
* @package Core
* @subpackage Environment\context
* @copyright © 2005-2019 PHPBoost
* @license https://www.gnu.org/licenses/gpl-3.0.html GNU/GPL-3.0
* @author Loic ROUCHON <horn@phpboost.com>
* @version PHPBoost 5.2 - last update: 2014 12 22
* @since PHPBoost 3.0 - 2010 04 11
*/
class PersistenceContext
{
/**
* @var SQLQuerier
*/
private static $sql_querier;
/**
* @var DBQuerier
*/
private static $db_querier;
/**
* @var DBMSUtils
*/
private static $dbms_utils;
/**
* Returns the sql querier
* @return DBQuerier
*/
public static function get_querier()
{
if (self::$db_querier === null)
{
self::$db_querier = new DBQuerier(self::get_sql_querier());
}
return self::$db_querier;
}
/**
* Returns the sql querier
* @return DBMSUtils
*/
public static function get_dbms_utils()
{
if (self::$dbms_utils === null)
{
self::$dbms_utils = DBFactory::new_dbms_util(self::get_querier());
}
return self::$dbms_utils;
}
/**
* Closes the database connection
*/
public static function close_db_connection()
{
DBFactory::close_db_connection();
self::$sql_querier = null;
self::$db_querier = null;
self::$dbms_utils = null;
}
/**
* Returns the sql querier
* @return SQLQuerier
*/
private static function get_sql_querier()
{
if (self::$sql_querier === null)
{
self::$sql_querier = DBFactory::new_sql_querier(DBFactory::get_db_connection());
}
return self::$sql_querier;
}
}
?>