<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Cloud

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

/**

 * Abstract factory for Zend_Cloud resources

 *

 * @category   Zend

 * @package    Zend_Cloud

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Cloud_AbstractFactory

{

    /**

     * Constructor

     * 

     * @return void

     */

    private function __construct()

    {

        // private ctor - should not be used

    }

    /**

     * Get an individual adapter instance

     * 

     * @param  string $adapterOption 

     * @param  array|Zend_Config $options 

     * @return null|Zend_Cloud_DocumentService_Adapter|Zend_Cloud_QueueService_Adapter|Zend_Cloud_StorageService_Adapter

     */

    protected static function _getAdapter($adapterOption, $options) 

    {

        if ($options instanceof Zend_Config) {

            $options = $options->toArray();

        }

        if (!isset($options[$adapterOption])) {

            return null;

        }

        $classname = $options[$adapterOption];

        unset($options[$adapterOption]);

        if (!class_exists($classname)) {

            require_once 'Zend/Loader.php';

            Zend_Loader::loadClass($classname);

        }

        return new $classname($options);

    }

}