Conversion from an old to a new version of a class with different property names

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Dani A
Dani A 2025-8-26
编辑： Dani A 2025-8-26
Let's say that I have a custom class testClass
classdef testClass
properties
input1
computationResultPropertyNameThatsTooLong
end
methods
function tc = testClass(input1)
tc.input1 = input1;
expensiveFunction = @sqrt;
tc.computationResultPropertyNameThatsTooLong = expensiveFunction(input1);
end
end
end
I'm offloading the computation of the testClass objects (of which I have tens of thousands) to another machine. Is there any way to make it so that I can alter the property names of testClass in a "clean " way (let's say I change computationResultPropertyNameThatsTooLong to computationResultBetterName) such that I can load in the data from the *.mat file as valid testClass objects? I can of course run the computations again, but I would prefer not to.

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采纳的回答

Matt J
Matt J 2025-8-26
编辑：Matt J 2025-8-26
One way is with a Dependent property. This makes it so you can reference the same property using tc.shortname.
classdef testClass
properties
input1
end
properties (Dependent)
shortname
end
properties (SetAccess = immutable, Hidden)
computationResultPropertyNameThatsTooLong
end
methods
function tc = testClass(input1)
tc.input1 = input1;
tc.computationResultPropertyNameThatsTooLong = expensiveFunction(input1);
end
function val=get.shortname(tc)
val=tc.computationResultPropertyNameThatsTooLong;
end
end
end
  1 个评论
Dani A
Dani A 2025-8-26
编辑：Dani A 2025-8-26
wow ok so I think this works ! setting it as a dependent property and the old property as hidden and immutable is clever. I'm testing it with my real data - i'll accept your answer later this evening when I've confirmed that it works

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