Calling a superclass method from any method
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Hi,
I have a base class:
classdef foo < handle
function methodA( self )
end
And a base class:
classdef goo < foo
function methodA( self )
if ( condition )
self.methodA@foo();
else
other stuff
end
end
function methodB( self )
self.methodA@foo();
end
end
Why isn't this possible ?
Every other langage allows it, I do not get the point. Is there any way to get it to work ?
I need A to be the public interface: the framework user is not allowed to bypass the override. However B is framework private, needed for internal management of values. So no, I cannot invert A & B in the child class nor I cannot rename A.
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답변 (2개)
Robert U
2017년 7월 19일
편집: Robert U
2017년 7월 19일
Hi Zangdaar,
I am not sure if I got your point correctly. In my understanding you have two base classes where class_B has to invoke a method of class_A. Since I do not know what data you would like to share between the objects I introduce a random property.
Base class A:
classdef class_A < handle;
properties
end
methods
function obj = methodA(obj)
disp('<< Method A of class_A utilized!');
end
end
end
Base class B:
classdef class_B < handle;
properties
classA_Property
end
methods
function obj = methodA(obj)
disp('<< Method A of class_B utilized!');
c = clock;
disp(['<< actual seconds: ',num2str(fix(c(6)))])
if mod(fix(c(6)),2) == 0
TmpClassA = class_A;
TmpClassA.methodA;
obj.classA_Property = TmpClassA;
else
disp('<< methodA in class_B continued.');
end
end
function obj = methodB(obj)
disp('<< Method B of class_B utilized!');
obj.methodA;
end
end
end
In that case you create a temporary object of class_A on which you can utilize method_A of class_A that can have the same name as method_A in class_B.
Second option in my opinion is, to use class_A as superclass for class_B_inh_A. In that case it is possible to call the methodA of class_A that is shadowed by methodA of class_B_inh_A. The only thing is that it is not possible to call it from methodB which brings us back to the temporary class_A call:
classdef class_B_inh_A < class_A;
properties
classA_Property;
end
methods
function obj = methodA(obj)
disp('<< Method A of class_B_inh_A utilized!');
c = clock;
disp(['<< actual seconds: ',num2str(fix(c(6)))])
if mod(fix(c(6)),2) == 0;
obj.methodA@class_A;
else
disp('<< methodA in class_B_inh_A continued.');
end
end
function obj = methodB(obj)
disp('<< Method B of class_B_inh_A utilized!');
obj.methodA;
TmpClassA = class_A;
TmpClassA.methodA;
obj.classA_Property = TmpClassA;
end
end
end
Calling class_A method A:
>> A = class_A;
>> A.methodA;
<< Method A of class_A utilized!
Calling class B method A:
>> B = class_B;
>> B.methodA;
<< Method A of class_B utilized!
<< actual seconds: 45
<< methodA in class_B continued.
>> B.methodA;
<< Method A of class_B utilized!
<< actual seconds: 52
<< Method A of class_A utilized!
Calling class B method B:
>> B.methodB;
<< Method B of class_B utilized!
<< Method A of class_B utilized!
<< actual seconds: 24
<< Method A of class_A utilized!
<< Method A of class_A utilized!
>> B.methodB;
<< Method B of class_B utilized!
<< Method A of class_B utilized!
<< actual seconds: 25
<< methodA in class_B continued.
<< Method A of class_A utilized!
Calling class B_inh_A method A:
>> B_inh_A = class_B_inh_A;
>> B_inh_A.methodA;
<< Method A of class_B_inh_A utilized!
<< actual seconds: 45
<< methodA in class_B_inh_A continued.
>> B_inh_A.methodA;
<< Method A of class_B_inh_A utilized!
<< actual seconds: 46
<< Method A of class_A utilized!
Calling class B_inh_A method B:
>> B_inh_A.methodB;
<< Method B of class_B_inh_A utilized!
<< Method A of class_B_inh_A utilized!
<< actual seconds: 53
<< methodA in class_B_inh_A continued.
<< Method A of class_A utilized!
>> B_inh_A.methodB;
<< Method B of class_B_inh_A utilized!
<< Method A of class_B_inh_A utilized!
<< actual seconds: 54
<< Method A of class_A utilized!
<< Method A of class_A utilized!
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