<?php

class Q_Ws {
	
	private static $_driver;
	
	private static $_config = array();
	
	private static $_ws;
	
	public static function factory($driver = 'httpcws', array $config = array('section' => 'servers')) {
		if (empty($driver) || !array_key_exists('section', $config)) {
			throw new Q_Exception(__CLASS__ . 'Ws driver be empty or Config not "section" key.');
		}
		$class = 'Q_Ws_Adapter_' . ucfirst($driver);
		if (!class_exists($class)) {
			throw new Q_Exception(__CLASS__ . ' Not  ' . $class . ' Class. ');
		}
		$deff_config = array_diff($config, self::$_config);
		if (self::$_driver == $driver || empty($deff_config)) {
			return self::$_ws;
		}
		return self::$_ws = new $class($config);
	}
}