Classes

File core/environment/context/PersistenceContext.class.php

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   &copy; 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;
    }
}
?>