classdef ExcelFirstColumnTimeReader < io.reader

  methods
    % ...

    function supported = supportsVariable(~, val)
      % Support structure with fields t (time), d (data), and n (name)
      supported = ...
        isstruct(val) && ...
        isfield(val,'t') && ...
        isfield(val,'d') && ...
        isfield(val,'n');
      if supported
        for idx = 1:numel(val)
          varName = val(idx).n;
          time = val(idx).t;
          varData = val(idx).d;
                    
          % Name must be string or character array
          if ~ischar(varName) && ~isstring(varName)
            supported = false;
            
          % Time must be double column vector
          elseif ~isa(time,'double') || ~iscolumn(time)
            supported = false;

          % Data size must match time size
          else
            timeSz = size(time);
            dataSz = size(varData);
                        
            if ~isnumeric(varData) || ~isequal(dataSz, timeSz)
                    supported = false;
            end
          end
        end
      end
    end

  % ...
  end
end