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annotate m-toolbox/classes/@time/parse.m @ 0:f0afece42f48

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Import.
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 23 Nov 2011 19:22:13 +0100
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 function msec = parse(str, format, timezone)
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2
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3 % second and third arguments are optional
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4 if nargin < 3
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5 timezone = '';
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6 end
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7 if nargin < 2
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8 format = '';
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9 end
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10
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11 % default timezone
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12 if isempty(timezone)
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13 timezone = time.timezone;
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14 end
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15 % convert string timezone into java object
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16 if ischar(timezone)
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17 timezone = java.util.TimeZone.getTimeZone(timezone);
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18 end
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19
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20 % obtain a java time format description to use for parsing
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21 if isempty(format)
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22 % infere it from the string
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23 format = parse_time_string(str);
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24 else
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25 % convert a given MATLAB time format into a Java one
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26 format = time.matfrmt2javafrmt(format);
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27 end
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28
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29 % parse the string accordingly to the corrent format and timezone
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30 tformat = java.text.SimpleDateFormat(format, java.util.Locale.UK);
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31 tformat.setTimeZone(timezone);
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32 try
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33 % It is necessary to replace 'GMT+03' by 'GMT+03:00' because java
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34 % expects the ':00' at the end.
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35 str = regexprep(str, '([gG][mM][tT][+-]\d\d?$)', '$1:00');
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36 msec = tformat.parse(str).getTime();
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37 catch
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38 error('### unable to parse time string ''%s'' accordingly to format ''%s''', str, format);
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39 end
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40
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41 end
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42
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43
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44 function str = parse_time_string(str)
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45
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46 % supported patterns
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47 parse = { '\s[gG][mM][tT][+-]?\d\d?$', ' z'; ... % GMT+1 or GMT+12
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48 '\s[gG][mM][tT][+-]?\d\d?:\d\d$', ' z'; ... % GMT+08:12
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49 '\s\w{3}$', ' z'; ... % PST
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50 '\s[+-]\d{4}$', ' Z'; ... % +0800
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51 '\d{2}:\d{2}:\d{2}', 'HH:mm:ss'; ...
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52 '\d{2}:\d{2}', 'mm:ss'; ...
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53 '\d{2} \w{3} \d{4}', 'dd MMM yyyy'; ...
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54 '\d{2}-\w{3}-\d{4}', 'dd-MMM-yyyy'; ...
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55 '\d{2}.\w{3}.\d{4}', 'dd.MMM.yyyy'; ...
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56 '\d{2}-\d{2}-\d{4}', 'dd-MM-yyyy'; ...
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57 '\d{2}\.\d{2}\.\d{4}', 'dd.MM.yyyy'; ...
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58 '\d{4}-\d{2}-\d{2}', 'yyyy-MM-dd'; ...
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59 '\d{4}\.\d{2}\.\d{2}', 'yyyy.MM.dd'; ...
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60 '\d{2}-\d{2}', 'MM-dd'; ...
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61 '\.\d{1,3}', '.SSS'};
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62
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63 % try to match the patterns to the string and replace
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64 % it with the corresponding Java time format descriptor
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65 re = parse(:,1);
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66 frmt = parse(:,2);
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67 str = regexprep(str, re, frmt);
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68
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69 end