function out = fieldnames(obj)
%FIELDNAMES Get object property names.
%
%    NAMES = FIELDNAMES(OBJ) returns a cell array of strings containing 
%    the names of the properties associated with the object, OBJ.
%    For qp_data_resource objects this function hides the structure fields.

%----- LGPL --------------------------------------------------------------------
%                                                                               
%   Copyright (C) 2011-2020 Stichting Deltares.                                     
%                                                                               
%   This library 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 version 2.1.                         
%                                                                               
%   This library is distributed in the hope that it will be useful,              
%   but WITHOUT ANY WARRANTY; without even the implied warranty of               
%   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU            
%   Lesser General Public License for more details.                              
%                                                                               
%   You should have received a copy of the GNU Lesser General Public             
%   License along with this library; if not, see <http://www.gnu.org/licenses/>. 
%                                                                               
%   contact: delft3d.support@deltares.nl                                         
%   Stichting Deltares                                                           
%   P.O. Box 177                                                                 
%   2600 MH Delft, The Netherlands                                               
%                                                                               
%   All indications and logos of, and references to, "Delft3D" and "Deltares"    
%   are registered trademarks of Stichting Deltares, and remain the property of  
%   Stichting Deltares. All rights reserved.                                     
%                                                                               
%-------------------------------------------------------------------------------
%   http://www.deltaressystems.com
%   $HeadURL$
%   $Id$

% Error checking.
if ~isa(obj, 'qp_data_resource')
    error('Fieldnames called using incorrect object type.');
end

out = {...
    'ndimensions','dimensionnames','dimension', ...
    'size', ...
    'timedependent','ntimes','times', ...
    'nsubfields','subfieldnames','subfieldvalues','subfield', ...
    'nlocations','locationnames','location', ...
    'nquantities','quantitynames','quantity','listquantities', ...
    'nstations','stationnames', ...
    'unit'};
