对多种属性使用一套方法MATLAB [英] Use one set method for multiple properties MATLAB

问题描述

我有几个本质上使用相同的 set 方法的属性:

I have several properties that use essentially the same set method:

classdef MyClass

    properties
        A
        B
    end

    methods

        function mc = MyClass(a,b)   % Constructor
            mc.A = a;
            mc.B = b;
        end

        function mc = set.A(mc, a) % setter for A
            if a > 5
                mc.A = a;
            else
                error('A should be larger than 5');
            end
        end

        function mc = set.B(mc, b) %setter for B
            if b > 5
                mc.B = b;
            else
                error('B should be larger than 5');
            end
        end


    end


end

1. 是否可以仅对变量 A 和 B 使用一个 set 函数?(请注意， error 函数使用属性名称作为字符串.)

1. Is there a way to use only one set function for variables A and B? (Please note that the error function use the property names as strings.)

是否建议仅使用一个 set 函数?使用一个 set 函数可能有哪些弊端?

Is it suggested to use only one set function? What are the possible drawbacks of using one set function?

推荐答案

唯一真正的方法是将通用代码提取到另一个函数，然后从设置器中调用它:

The only real way is to extract the common code to another function, and call it from the setters:

classdef MyClass

properties
    A
    B
end%public properties

methods

    function mc = MyClass(a,b)   % Constructor
        mc.A = a;
        mc.B = b;
    end

    function mc = set.A(mc, value) % setter for A
        mc = mc.commonSetter(value, 'A');
    end

    function mc = set.B(mc, value) %setter for B
        mc = mc.commonSetter(value, 'B');
    end


end%public methods

methods(protected = true)

    function mc = commonSetter(mc, property, value)
        if value <= 5;
            error([property ' should be less than 5');
        end
        mc.(property) = value;

    end%commonSetter()

end%protected methods


end%classdef

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