/**
* Creates a new db layer
*
* @abstract
* @access public
*
* @param String $layerType 'ADODB', 'METABASE', 'MYSQL', 'PEAR', PHPLIB'
* @param String $libraryPath path to the abstraction layer
* @param String $dbType for the abstraction layers (e.g. 'ODBC')
* @param Integer $preferredResType the preferred result type
*
* @returns AbstractDB
*/
public static function getLayer($layerType, $libraryPath, $dbType, $preferredResType = ANYDB_RES_ASSOC)
{
$path = dirname(__FILE__) . '/dbs/';
$layer = strtoupper(trim($layerType));
// checks if php extension is loaded
if ($dbType != '') {
anyDB::checkForDB($dbType);
} else {
anyDB::checkForDB($layer);
}
// gets the layer
$res = null;
switch ($layer) {
case 'DBX':
require_once $path . 'DbxDB.php';
$res = new DbxDB($libraryPath, $dbType, $preferredResType);
break;
case 'METABASE':
require_once $path . 'MetabaseDB.php';
$res = new MetabaseDB($libraryPath, $dbType, $preferredResType);
break;
case 'MYSQL':
require_once $path . 'MysqlDB.php';
$res = new MysqlDB('', 'mysql', $preferredResType);
break;
case 'PGSQL':
case 'POSTGRES':
require_once $path . 'PostgresDB.php';
$res = new PostgresDB('', 'pgsql', $preferredResType);
break;
case 'PEAR':
require_once $path . 'PearDB.php';
$res = new PearDB($libraryPath, $dbType, $preferredResType);
break;
case 'PHPLIB':
require_once $path . 'PhplibDB.php';
$res = new PhplibDB($libraryPath, $dbType, $preferredResType);
break;
case 'ADODB':
require_once $path . 'ADOdbDB.php';
$res = new ADOdbDB($libraryPath, $dbType, $preferredResType);
break;
case 'SQLITE':
require_once $path . 'SQLiteDB.php';
$res = new SQLiteDB('', 'sqlite', $preferredResType);
break;
default:
die('Unknown database layer!');
}
return $res;
}
