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R8218/getConfig.m
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getConfig.m
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function output = getConfig(varargin)
% Extract config parameters out of a json file.
%
% Output: Structure resulting from jsondecode() function.
%
% Inputs:
% ("filename", filename) filename is the full path (with file extension) to
% the json file to read.
% Default: "config.json"
%
% ("convertTextToString", boolean) MATLAB jsondecode parser automatically
% translate text to char arrays. This option replace these char arrays with
% strings.
% Default: true
%
% ("parameters", [parameter1, parameter2]) the output structure only contains
% the parameters specified in the given string array/scalar. The default value
% return all the parameters.
% Default: "*"
%
% Example:
% getConfig("filename", "simulationConfig.json",...
% "convertTextToString", false,...
% "parameters", ["simulationModel" "patientParameters"]);
%
% Tips:
% getConfig("parameters", "foo")
% is equivalent to
% getConfig().foo
options = inputParser;
addOptional(options, "filename", "config.json");
addOptional(options, "convertTextToString", true);
addOptional(options, "parameters", "*");
parse(options, varargin{:});
options = options.Results;
config = jsondecode(fileread(options.filename));
if not(isequal(options.parameters, "*"))
allParameters = string(fields(config))';
parametersToRemove = allParameters(not(ismember(allParameters, options.parameters)));
config = rmfield(config, parametersToRemove);
end
if options.convertTextToString
parameters = string(fields(config))';
for parameter = parameters
if ischar(config.(parameter))
config.(parameter) = string(config.(parameter));
end
end
end
output = config;
end
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