/**
* Force an instance inside class cache. Setting arguments to null nukes all or part of the cache
*
* @param string|null $key TableClass to replace. Set it to null to nuke the entire cache
* @param F0FTable|null $instance Instance to replace. Set it to null to nuke $key instances
*
* @return bool Did I correctly switch the instance?
*/
public static function forceInstance($key = null, $instance = null)
{
if (is_null($key)) {
self::$instances = array();
return true;
} elseif ($key && isset(self::$instances[$key])) {
// I'm forcing an instance, but it's not a F0FTable, abort! abort!
if (!$instance || $instance && $instance instanceof F0FTable) {
self::$instances[$key] = $instance;
return true;
}
}
return false;
}