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function [valid, message] = isSBML_FBC_Objective(varargin)
% [valid, message] = isSBML_FBC_Objective(SBMLFBCObjective, level, version, pkgVersion)
%
% Takes
%
% 1. SBMLStructure, an SBML FBC Objective structure
% 2. level, an integer representing an SBML level
% 3. version, an integer representing an SBML version
% 4. pkgVersion, an integer representing an FBC package version
%
% Returns
%
% 1. valid =
% - 1, if the structure represents
% a MATLAB_SBML FBC Objective structure of the appropriate
% level, version and FBC version
% - 0, otherwise
% 2. a message explaining any failure
%
% *NOTE:* The fields present in a MATLAB_SBML FBC Objective structure of the appropriate
% level and version can be found using getObjectiveFieldnames(level, version, pkgVersion)
%
%<!---------------------------------------------------------------------------
% This file is part of SBMLToolbox. Please visit http://sbml.org for more
% information about SBML, and the latest version of SBMLToolbox.
%
% Copyright (C) 2009-2012 jointly by the following organizations:
% 1. California Institute of Technology, Pasadena, CA, USA
% 2. EMBL European Bioinformatics Institute (EBML-EBI), Hinxton, UK
%
% Copyright (C) 2006-2008 jointly by the following organizations:
% 1. California Institute of Technology, Pasadena, CA, USA
% 2. University of Hertfordshire, Hatfield, UK
%
% Copyright (C) 2003-2005 jointly by the following organizations:
% 1. California Institute of Technology, Pasadena, CA, USA
% 2. Japan Science and Technology Agency, Japan
% 3. University of Hertfordshire, Hatfield, UK
%
% SBMLToolbox is free software; you can redistribute it and/or modify it
% under the terms of the GNU Lesser General Public License as published by
% the Free Software Foundation. A copy of the license agreement is provided
% in the file named "LICENSE.txt" included with this software distribution.
%----------------------------------------------------------------------- -->
switch (nargin)
case 4
SBMLStructure = varargin{1};
level = varargin{2};
version = varargin{3};
pkgVersion = varargin{4};
case 3
SBMLStructure = varargin{1};
level = varargin{2};
version = varargin{3};
pkgVersion = 1;
case 2
SBMLStructure = varargin{1};
level = varargin{2};
version = 1;
pkgVersion = 1;
case 1
SBMLStructure = varargin{1};
level = 3;
version = 1;
pkgVersion = 1;
otherwise
error('need at least one argument');
end;
if (length(SBMLStructure) > 1)
message = 'cannot deal with arrays of structures';
valid = 0;
return;
end;
isValidLevelVersionCombination(level, version);
message = '';
% check that argument is a structure
valid = isstruct(SBMLStructure);
% check the typecode
typecode = 'SBML_FBC_OBJECTIVE';
if (valid == 1 && ~isempty(SBMLStructure))
if isfield(SBMLStructure, 'typecode')
if (strcmp(typecode, SBMLStructure.typecode) ~= 1)
valid = 0;
message = 'typecode mismatch';
return;
end;
else
valid = 0;
message = 'typecode field missing';
return;
end;
end;
% if the level and version fields exist they must match
if (valid == 1 && isfield(SBMLStructure, 'level') && ~isempty(SBMLStructure))
if ~isequal(level, SBMLStructure.level)
valid = 0;
message = 'level mismatch';
end;
end;
if (valid == 1 && isfield(SBMLStructure, 'version') && ~isempty(SBMLStructure))
if ~isequal(version, SBMLStructure.version)
valid = 0;
message = 'version mismatch';
end;
end;
if (valid == 1 && isfield(SBMLStructure, 'fbc_version') && ~isempty(SBMLStructure))
if ~isequal(pkgVersion, SBMLStructure.fbc_version)
valid = 0;
message = 'FBC version mismatch';
end;
end;
% check that structure contains all the necessary fields
[SBMLfieldnames, numFields] = getFieldnames('SBML_FBC_OBJECTIVE', level, ...
version);
if (numFields ==0)
valid = 0;
message = 'invalid level/version';
end;
index = 1;
while (valid == 1 && index <= numFields)
valid = isfield(SBMLStructure, char(SBMLfieldnames(index)));
if (valid == 0);
message = sprintf('%s field missing', char(SBMLfieldnames(index)));
end;
index = index + 1;
end;
%check that any nested structures are appropriate
% fluxObjective
if (valid == 1)
index = 1;
while (valid == 1 && index <= length(SBMLStructure.fbc_fluxObjective))
[valid, message] = isSBML_FBC_FluxObjective(SBMLStructure.fbc_fluxObjective(index), ...
level, version, pkgVersion);
index = index + 1;
end;
end;
% report failure
if (valid == 0)
message = sprintf('Invalid FBC Objective\n%s\n', message);
end;
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