/**
*
* @return __WebFlowManager
*/
public static function &getInstance()
{
if (self::$_instance == null) {
self::$_instance = new __WebFlowManager();
}
return self::$_instance;
}
public static function createFlowExecution($flow_id)
{
$return_value = null;
$flow_definition = __WebFlowManager::getInstance()->getFlowDefinition($flow_id);
if ($flow_definition != null) {
$return_value = new __FlowExecution($flow_definition);
} else {
throw __ExceptionFactory::getInstance()->createException('Unknown flow for id ' . $flow_id);
}
return $return_value;
}