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classdef (Abstract) Value < matlab.mixin.Copyable
% Value Summary of Value
%
% The base class for instances of Slice classes.
%
% Value Methods:
% ice_preMarshal - The Ice run time invokes this method prior to
% marshaling an object's data members.
% ice_postUnmarshal - The Ice run time invokes this method after
% unmarshaling an object's data members.
% ice_getSlicedData - Returns the sliced data if the value has a
% preserved-slice base class and has been sliced during unmarshaling.
% Copyright (c) ZeroC, Inc. All rights reserved.
methods
function obj = Value()
% Value constructor
%
% We need to assign each Value instance a unique identifier for marshaling purposes. This persistent
% variable retains its setting as long as there is at least one Value instance still active. Once the
% last instance is collected, the variable gets cleared and we start over again.
%
persistent index;
if isempty(index)
index = int32(0);
end
index = index + 1;
assert(index > 0); % Check for rollover
obj.iceInternal_ = index;
end
function ice_preMarshal(~)
% ice_preMarshal - The Ice run time invokes this method prior to
% marshaling an object's data members. This allows a subclass
% to override this method in order to validate its data members.
end
function ice_postUnmarshal(~)
% ice_postUnmarshal - The Ice run time invokes this method after
% unmarshaling an object's data members. This allows a subclass
% to override this method in order to perform additional
% initialization.
end
function r = ice_getSlicedData(~)
% ice_getSlicedData - Returns the sliced data if the value has a
% preserve-slice base class and has been sliced during
% unmarshaling of the value; an empty array is returned otherwise.
%
% Overridden by subclasses that have the "preserve-slice" metadata.
%
r = [];
end
end
methods(Abstract)
id = ice_id(obj)
end
methods(Static)
function id = ice_staticId()
id = '::Ice::Object';
end
end
methods(Hidden=true)
function iceWrite(obj, os)
os.startValue([]);
obj.iceWriteImpl(os);
os.endValue();
end
function iceRead(obj, is)
is.startValue();
obj.iceReadImpl(is);
is.endValue(false);
end
function r = iceDelayPostUnmarshal(~)
%
% Overridden by subclasses that need to do some post-processing after the initial round of
% unmarshaling is complete.
%
r = false;
end
function icePostUnmarshal(~)
%
% Overridden by subclasses that need to do some post-processing after the initial round of
% unmarshaling is complete.
%
end
end
methods(Abstract,Access=protected)
iceWriteImpl(obj, os)
iceReadImpl(obj, is)
end
properties(Hidden, NonCopyable)
iceInternal_ int32
end
end
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