matlab - 防止序列化

Question

我有一个 Matlab 类，其中实现序列化和反序列化会很痛苦，而且不需要。 因此，我重载了 saveobj 如下:

    function sobj = saveobj(self)
         sojb = [];
         error(['atmlab:' mfilename ':nostoring'], ...
            ['You tried to store %s %s.  Loading is impossible, ' ...
             'therefore I refuse to store.  Sorry.'], ...
             class(self), self.name);
    end

不幸的是，当我测试这个时，Matlab 试图提供帮助并将警告变成错误(由于某种原因两次):

>> save('/tmp/test.mat', 'X')
Warning: While saving an object of class 'SatDataset':
You tried to store SatDataset amsua.  Loading is impossible, therefore I refuse to store.  Sorry.
(Type "warning off atmlab:SatDataset:nostoring" to suppress this warning.) 
Warning: While saving an object of class 'SatDataset':
You tried to store SatDataset amsua.  Loading is impossible, therefore I refuse to store.  Sorry.
(Type "warning off atmlab:SatDataset:nostoring" to suppress this warning.) 

我可以使用undocumented feature将警告变成错误:

>> warning error atmlab:SatDataset:nostoring
>> save('/tmp/test.mat', 'X')
Error using save
While saving an object of class 'SatDataset':
You tried to store SatDataset amsua.  Loading is impossible, therefore I refuse to store.  Sorry.

Unexpected error status flag encountered.  Resetting to proper state.

但这并不令人满意，因为我不想依赖未记录的功能，而且我当然不想强制用户这样做。

如何有效地抛出错误，防止用户尝试从我的类中序列化对象？

---

根据要求，重现情况的最小示例:

% in TestClass.m
classdef TestClass < handle
    methods
        function sobj = saveobj(self)
            sojb = [];
            error('Unable to store %s objects', class(self));
        end
    end
end

% on the interactive prompt:

>> t = TestClass();

>> save('/tmp/fubar.mat', 't');
Warning: While saving an object of class 'TestClass':
Unable to store TestClass objects 
Warning: While saving an object of class 'TestClass':
Unable to store TestClass objects 

Answer 1

就个人而言，我更喜欢将所有属性标记为Transient，并让对象有效地具有作为保存/加载结果的无效状态。阻止 MATLAB 保存您的数据非常困难，而且您的解决方法可能会严重干扰用户的工作流程。