获取更改命令而不修改集合
可能是一个命名很糟糕的标题，但无论如何......
我正在分层数据集上使用命令模式。所以基本上我需要一个返回一个对象的方法，该对象描述在不实际更改数据的情况下将进行的更改。例如：
对象 1 ->对象2->对象 3
如果我移动对象 1，则会导致对象 2 发生变化，从而导致对象 3 发生变化，因为它们相互依赖。所以...我需要一种方法来递归地遍历分层集合并收集移动对象 1 所需的更改，而无需实际修改集合。在递归进行到一半时，如果能够使用像 Object1.Location 这样的东西就好了，但它可能已经计划进行更改，所以我无法可靠地使用它。
我觉得有很多算法需要进行这种类型的“就地”修改。作为一名非计算机科学专业的学生，我对此类事情了解不多，所以我什至不知道要寻找哪些搜索词来找到“解决方案”。我将解决方案放在引号中，因为我意识到我的问题可能没有直接的解决方案，但我只是在寻找一些好的指南/示例来让我的大脑运转起来。
任何人都可以提供一些正在做的此类事情的真实示例吗？提前致谢。
Probably a very poorly named title, but anyway...
I am using the command pattern on a hierarchical data set. So basically I need a method that returns an object that describes the changes that will be made without actually changing the data. So for example:
Object 1 -> Object 2 -> Object 3
If I move object 1, it will cause a change in Object 2, which will cause a change in Object 3 because they depend on each other. So...I need a method to recursively go through the hierarchical collection and gather up the changes that are required to move Object 1 without actually modifying the collection. Halfway through the recursion it would be nice to be able to use something like Object1.Location, but it may already slated for change so I can't reliably use it.
I feel like there are plenty of algorithms and such that need to do this type of "in place" modification. As a non-CS major I didn't learn much of this type of thing, so I don't really even know what search terms to look for to find a "solution". I put solution in quotes because I realize there probably isn't a direct solution for my problem, but I am merely looking for some good guidelines/examples of this being done to get my brain cranking.
Can anyone provide some real-world examples of this type of thing being done? Thanks in advance.
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解决方案的一部分可能是访问者模式。您可以与访问者一起浏览对象树，并执行诸如生成“克隆”树之类的操作，该树代表您想要执行的操作的结果......
您能给我们一个您想要实现的示例吗？
我的2c
Well part of the solution might be the visitor pattern. You can go through your object tree with the visitor and do something like generating a "cloned" tree representing what will be the result of what you want to do ...
Can you give us an example of what you want to achieve ?
my2c