abstract class Object extends SystemObject implements Object_Interface
    {
            const           Blank                   = NULL;
        final   public          function copy()             { $copy = $this->getTemp(); $copy->set($this->__buffer); return $copy; }
        final   public          function duplicate()            { $copy = $this->getTemp(); $copy->set($this->__buffer)->setCopy($this->__copy); return $copy; }
        final   public          function get()              { return $this->__copy; }
        final   public          function restore()          { $this->setCopy($this->__buffer); return $this; }
        final   public          function registerMember(Hash $hash) { $this->__usedBy[] = $hash->getHashCode()->get(); }
            public          function set($value)            { try{ if(FALSE === $this->internalTypeIsModifiable()) return $this; $this->__buffer = $value; return $this->setCopy($this->__buffer); } catch(UnauthorizedAccessException $e){throw new ObjectHandlerWriteException(ObjectHandlerWriteException::ERROR_CAN_NOT_WRITE, $e);} }
        final   public          function apply()            { try{ if($this->internalTypeIsModifiable()) return $this->set($this->__copy); } catch(UnauthorizedAccessException $e){throw new ObjectHandlerWriteException(ObjectHandlerWriteException::ERROR_CAN_NOT_WRITE, $e);} }
            public          function __construct($value)        { parent::__construct(); $this->set($value); }
            private         $__copy                 = self::Blank;
            private         $__buffer               = self::Blank;
            private         $__usedBy               = array();
        final   protected       function getTemp()          { $c = get_class($this); return new $c($this->get()); }
        final   protected       function setCopy($value)        { $this->__copy = $value; return $this; }
        final   protected       function _compareTo(Object $object) { return new Boolean($this->get() === $object->get()); }
    }