source: temp/test-xoops.ec-cube.net/html/class/database/databasefactory.php @ 405

<?php
class XoopsDatabaseFactory
{

    function XoopsDatabaseFactory()
    {
    }

    /**
     * Get a reference to the only instance of database class and connects to DB
     * 
     * if the class has not been instantiated yet, this will also take 
     * care of that
     * 
     * @static
     * @staticvar   object  The only instance of database class
     * @return      object  Reference to the only instance of database class
     */
    function &getDatabaseConnection()
    {
        static $instance;
        if (!isset($instance)) {
            $file = XOOPS_ROOT_PATH.'/class/database/'.XOOPS_DB_TYPE.'database.php';
            require_once $file;
            if (!defined('XOOPS_DB_PROXY')) {
                $class = 'Xoops'.ucfirst(XOOPS_DB_TYPE).'DatabaseSafe';
            } else {
                $class = 'Xoops'.ucfirst(XOOPS_DB_TYPE).'DatabaseProxy';
            }
            $instance =& new $class();
            $instance->setLogger(XoopsLogger::instance());
            $instance->setPrefix(XOOPS_DB_PREFIX);
            if (!$instance->connect()) {
                trigger_error("Unable to connect to database", E_USER_ERROR);
            }
        }
        return $instance;
    }

    /**
     * Gets a reference to the only instance of database class. Currently
     * only being used within the installer.
     * 
     * @static
     * @staticvar   object  The only instance of database class
     * @return      object  Reference to the only instance of database class
     */
    function &getDatabase()
    {
        static $database;
        if (!isset($database)) {
            $file = XOOPS_ROOT_PATH.'/class/database/'.XOOPS_DB_TYPE.'database.php';
            require_once $file;
            if (!defined('XOOPS_DB_PROXY')) {
                $class = 'Xoops'.ucfirst(XOOPS_DB_TYPE).'DatabaseSafe';
            } else {
                $class = 'Xoops'.ucfirst(XOOPS_DB_TYPE).'DatabaseProxy';
            }
            $database =& new $class();
        }
        return $database;
    }


}
?>