cakephp2-php8/libs/dbo_factory.php
2005-07-04 02:59:39 +00:00

124 lines
No EOL
3.3 KiB
PHP

<?php
//////////////////////////////////////////////////////////////////////////
// + $Id$
// +------------------------------------------------------------------+ //
// + Cake PHP : Rapid Development Framework <http://www.cakephp.org/> + //
// + Copyright: (c) 2005, CakePHP Authors/Developers + //
// + Author(s): Michal Tatarynowicz aka Pies <tatarynowicz@gmail.com> + //
// + Larry E. Masters aka PhpNut <nut@phpnut.com> + //
// + Kamil Dzielinski aka Brego <brego.dk@gmail.com> + //
// +------------------------------------------------------------------+ //
// + Licensed under The MIT License + //
// + Redistributions of files must retain the above copyright notice. + //
// + See: http://www.opensource.org/licenses/mit-license.php + //
//////////////////////////////////////////////////////////////////////////
/**
* Purpose: DbFactory
*
* Description:
* Creates DBO-descendant objects from a given db connection configuration
*
* @filesource
* @author CakePHP Authors/Developers
* @copyright Copyright (c) 2005, CakePHP Authors/Developers
* @link https://trac.cakephp.org/wiki/Authors Authors/Developers
* @version $Revision$
* @modifiedby $LastChangedBy$
* @lastmodified $Date$
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
/**
* Enter description here...
*
*/
uses('object');
config('database');
/**
* Enter description here...
*
* @package cake
* @subpackage cake.libs
* @since CakePHP v 1.0.0.0
*
*/
class DboFactory extends Object
{
/**
* A semi-singelton. Returns actual instance, or creates a new one with given config.
*
* @param string $config Name of key of $dbConfig array to be used.
* @return mixed
*/
function getInstance($config = null)
{
static $instance;
if (!isset($instance))
{
if ($config == null)
{
return false;
}
$configs = get_class_vars('DATABASE_CONFIG');
$config = $configs[$config];
// special case for AdoDB -- driver name in the form of 'adodb-drivername'
if (preg_match('#^adodb[\-_](.*)$#i', $config['driver'], $res))
{
uses('dbo/dbo_adodb');
$config['driver'] = $res[1];
$instance = array(DBO_AdoDB($config));
}
// special case for PEAR:DB -- driver name in the form of 'pear-drivername'
elseif (preg_match('#^pear[\-_](.*)$#i', $config['driver'], $res))
{
uses('dbo/dbo_pear');
$config['driver'] = $res[1];
$instance = array(new DBO_Pear($config));
}
// regular, Cake-native db drivers
else
{
$db_driver_class = 'DBO_'.$config['driver'];
$db_driver_fn = LIBS.strtolower('dbo'.DS.$db_driver_class.'.php');
if (file_exists($db_driver_fn))
{
uses(strtolower('dbo'.DS.$db_driver_class));
$instance = array(new $db_driver_class($config));
}
else
{
trigger_error(ERROR_UNKNOWN_DATABASE_DRIVER, E_USER_ERROR);
return false;
}
}
}
return $instance[0];
}
/**
* Sets config to use. If there is already a connection, close it first.
*
* @param string $configName Name of the config array key to use.
* @return mixed
*/
function setConfig($config)
{
$db = DboFactory::getInstance();
if ($db->isConnected() === true)
{
$db->close();
}
return $this->getInstance($config);
}
}
?>