source: trunk/src/xml2struct.m @ 1086

Last change on this file since 1086 was 1071, checked in by g7moreau, 15 months ago
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File size: 4.7 KB
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1% 'xml2struct': read an xml file as a Matlab structure, converts numeric character strings into numbers
2%-----------------------------------------------------------------------
3% function [s,RootTag,errormsg]=xml2struct(filename,varargin)
4%
5% OUTPUT:
6% s= Matlab structure corresponding to the input xml file
7% RootTag= name of the root tag in the xml file
8% errormsg: errormessage, ='' by default
9%
10% INPUT:
11% filename: name of the xml file
12% varargin: optional list of strings to restrict the reading to a selection of subtrees, for instance 'GeometryCalib' (save reading time)
13
14%=======================================================================
15% Copyright 2008-2020, LEGI UMR 5519 / CNRS UGA G-INP, Grenoble, France
16
17%   http://www.legi.grenoble-inp.fr
18%   Joel.Sommeria - Joel.Sommeria (A) legi.cnrs.fr
19%
20%     This file is part of the toolbox UVMAT.
21%
22%     UVMAT is free software; you can redistribute it and/or modify
23%     it under the terms of the GNU General Public License as published
24%     by the Free Software Foundation; either version 2 of the license,
25%     or (at your option) any later version.
26%
27%     UVMAT is distributed in the hope that it will be useful,
28%     but WITHOUT ANY WARRANTY; without even the implied warranty of
29%     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
30%     GNU General Public License (see LICENSE.txt) for more details.
31%=======================================================================
32
33function [s,RootTag,errormsg]=xml2struct(filename,varargin)
34s=[];
35RootTag='';
36errormsg='';
37try
38    t=xmltree(filename);% read the file as an xmltree object t
39catch ME
40    errormsg=ME.message;
41    if ~isempty(regexp(ME.message,'Undefined function'))||~isempty(regexp(ME.message,'Missing'))
42        errormsg=[errormsg ': package xmltree not correctly installed, reload it from www.artefact.tk/software/matlab/xml'];
43    end
44    return
45end
46iline=0;
47
48while isempty(RootTag)
49    iline=iline+1;
50    if strcmp(get(t,iline,'type'),'element')
51        RootTag=get(t,iline,'name');
52    end
53end
54if nargin>1
55    for isub=1:nargin-1
56        uid_sub=find(t,['/' RootTag '/' varargin{isub}]);
57        if isempty(uid_sub)
58            s.(varargin{isub})=[];
59        else
60        tsub=branch(t,uid_sub);
61        ss=convert(tsub);
62        s.(varargin{isub})=convert_string(ss);
63        end
64    end
65else
66    try
67    ss=convert(t);%transform the xmltree object into a Matlab structure.
68    s=convert_string(ss);
69    catch ME
70        errormsg=ME.message;
71    end
72end
73
74
75function out=convert_string(ss)
76info=whos('ss');
77switch info.class
78    case 'struct'
79        out=[];%default
80        names = fieldnames(ss);
81        for k=1:length(names)
82            out.(names{k})=convert_string(ss.(names{k}));
83        end
84    case 'char'
85        % try to convert to number if the char does not correspond to a function (otherwise str2num calls this function as it uses 'eval')
86        if exist(ss,'builtin')||exist(ss,'file')% ss corresponds to the name of a builtin Matlab function or a file
87            out=ss; %reproduce the input string
88        else
89            out=str2num(ss);% convert to number or vector (str2num applied to a fct name executes this fct by 'eval', thus this possibility had to be ruled out above
90            if isempty(out)
91                sep_ind=regexp(ss,'\s&\s');% check for separator ' & ' which indicates column separation in tables
92                if ~isempty(sep_ind)
93                    sep_ind=[-2 sep_ind length(ss)+1];
94                    out={};
95                    for icolumn=1:length(sep_ind)-1
96                        out{1,icolumn}=ss(sep_ind(icolumn)+3:sep_ind(icolumn+1)-1);% get info between separators as a cell array
97                    end
98                else
99                    out=ss; %reproduce the input string
100                end
101            end
102        end
103    case 'cell'
104        out={};%default
105        check_numeric=zeros(size(ss));
106        for ilist=1:numel(ss)
107            if ~strcmp(ss{ilist},'image') && ~isempty(str2num(ss{ilist}))
108                out{ilist,1}=str2num(ss{ilist});
109                check_numeric(ilist)=1;
110            else
111                sep_ind=regexp(ss{ilist},'\s&\s');% check for separator ' & ' which indicates column separation in tables
112                if ~isempty(sep_ind)
113                    sep_ind=[-2 sep_ind length(ss{ilist})+1];
114                    for icolumn=1:length(sep_ind)-1
115                        out{ilist,icolumn}=ss{ilist}(sep_ind(icolumn)+3:sep_ind(icolumn+1)-1);
116                    end
117                else
118                    out{ilist,1}=ss{ilist}; %reproduce the input string
119                end
120            end
121        end
122        if isequal(check_numeric,ones(size(ss)))
123            out=cell2mat(out);
124        end
125    otherwise
126        out=ss;
127end
128
129   
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