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comparison flys-backend/src/main/java/de/intevation/flys/utils/DateGuesser.java @ 3471:e4250c6e1538 2.8.1

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merged flys-backend/2.8.1
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:40 +0200
parents 2e18e12fac11
children 8195396b23ce
comparison
equal deleted inserted replaced
3468:f37e7e8907cb 3471:e4250c6e1538
1 package de.intevation.flys.utils;
2
3 /**
4 * Copyright (c) 2006 by Intevation GmbH
5 *
6 * @author Sascha L. Teichmann (teichmann@intevation.de)
7 *
8 * This program is free software under the LGPL (&gt;=v2.1)
9 * Read the file LGPL coming with FLYS for details.
10 */
11
12 import java.util.Date;
13 import java.util.Calendar;
14
15 import java.util.regex.Pattern;
16 import java.util.regex.Matcher;
17
18 public final class DateGuesser {
19 public static final String [] MONTH = {
20 "jan", "feb", "mrz", "apr", "mai", "jun",
21 "jul", "aug", "sep", "okt", "nov", "dez"
22 };
23
24 public static final int guessMonth(String s) {
25 s = s.toLowerCase();
26 for (int i = 0; i < MONTH.length; ++i)
27 if (MONTH[i].equals(s)) {
28 return i;
29 }
30 return -1;
31 }
32
33 public static final Pattern YYYY_MM_DD =
34 Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})$");
35
36 public static final Pattern DD_MM_YYYY =
37 Pattern.compile("^(\\d{1,2})\\.(\\d{1,2})\\.(\\d{2,4})$");
38
39 public static final Pattern MMM_YYYY =
40 Pattern.compile("^(\\d{0,2})\\.?(\\w{3})\\.?(\\d{2,4})$");
41
42 public static final Pattern GARBAGE_YYYY =
43 Pattern.compile("^\\D*(\\d{2,4})$");
44
45 public static final Pattern YYYY_MM_DDThh_mm =
46 Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2})$");
47
48 public static final Pattern YYYY_MM_DDThh_mm_ss =
49 Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2}):(\\d{2})$");
50
51 public static final Pattern DD_MM_YYYYThh_mm =
52 Pattern.compile("^(\\d{1,2})\\.(\\d{1,2})\\.(\\d{2,4})T(\\d{1,2}):(\\d{2})$");
53
54 public static final Pattern DD_MM_YYYYThh_mm_ss =
55 Pattern.compile("^(\\d{1,2})\\.(\\d{1,2})\\.(\\d{2,4})T(\\d{1,2}):(\\d{2}):(\\d{2})$");
56
57 private DateGuesser() {
58 }
59
60 public static final int calendarMonth(String month) {
61 return calendarMonth(Integer.parseInt(month));
62 }
63
64 public static final int calendarMonth(int month) {
65 return Math.max(Math.min(month-1, 11), 0);
66 }
67
68 public static Date guessDate(String s) {
69 if (s == null || (s = s.trim()).length() == 0) {
70 throw new IllegalArgumentException();
71 }
72
73 Matcher m;
74
75 m = YYYY_MM_DD.matcher(s);
76
77 if (m.matches()) {
78 Calendar cal = Calendar.getInstance();
79 String year = m.group(1);
80 String month = m.group(2);
81 String day = m.group(3);
82 cal.set(
83 Integer.parseInt(year),
84 calendarMonth(month),
85 Integer.parseInt(day),
86 12, 0, 0);
87 return cal.getTime();
88 }
89
90 m = DD_MM_YYYY.matcher(s);
91
92 if (m.matches()) {
93 Calendar cal = Calendar.getInstance();
94 String year = m.group(3);
95 String month = m.group(2);
96 String day = m.group(1);
97 cal.set(
98 Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0),
99 calendarMonth(month),
100 Integer.parseInt(m.group(1)),
101 12, 0, 0);
102 return cal.getTime();
103 }
104
105 m = MMM_YYYY.matcher(s);
106
107 if (m.matches()) {
108 int month = guessMonth(m.group(2));
109 if (month >= 0) {
110 Calendar cal = Calendar.getInstance();
111 String year = m.group(3);
112 String day = m.group(1);
113 cal.set(
114 Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0),
115 month,
116 day.length() == 0 ? 15 : Integer.parseInt(day),
117 12, 0, 0);
118 return cal.getTime();
119 }
120 }
121
122 m = YYYY_MM_DDThh_mm.matcher(s);
123
124 if (m.matches()) {
125 Calendar cal = Calendar.getInstance();
126 String year = m.group(1);
127 String month = m.group(2);
128 String day = m.group(3);
129 String hour = m.group(4);
130 String minute = m.group(5);
131 cal.set(
132 Integer.parseInt(year),
133 calendarMonth(month),
134 Integer.parseInt(day),
135 Integer.parseInt(hour),
136 Integer.parseInt(minute),
137 0
138 );
139 return cal.getTime();
140 }
141
142 m = YYYY_MM_DDThh_mm_ss.matcher(s);
143
144 if (m.matches()) {
145 Calendar cal = Calendar.getInstance();
146 String year = m.group(1);
147 String month = m.group(2);
148 String day = m.group(3);
149 String hour = m.group(4);
150 String minute = m.group(5);
151 String second = m.group(6);
152 cal.set(
153 Integer.parseInt(year),
154 calendarMonth(month),
155 Integer.parseInt(day),
156 Integer.parseInt(hour),
157 Integer.parseInt(minute),
158 Integer.parseInt(second)
159 );
160 return cal.getTime();
161 }
162
163 m = DD_MM_YYYYThh_mm.matcher(s);
164
165 if (m.matches()) {
166 Calendar cal = Calendar.getInstance();
167 String year = m.group(3);
168 String month = m.group(2);
169 String day = m.group(1);
170 String hour = m.group(4);
171 String minute = m.group(5);
172 cal.set(
173 Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0),
174 calendarMonth(month),
175 Integer.parseInt(day),
176 Integer.parseInt(hour),
177 Integer.parseInt(minute),
178 0
179 );
180 return cal.getTime();
181 }
182
183 m = DD_MM_YYYYThh_mm_ss.matcher(s);
184
185 if (m.matches()) {
186 Calendar cal = Calendar.getInstance();
187 String year = m.group(3);
188 String month = m.group(2);
189 String day = m.group(1);
190 String hour = m.group(4);
191 String minute = m.group(5);
192 String second = m.group(6);
193 cal.set(
194 Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0),
195 calendarMonth(month),
196 Integer.parseInt(day),
197 Integer.parseInt(hour),
198 Integer.parseInt(minute),
199 Integer.parseInt(second)
200 );
201 return cal.getTime();
202 }
203
204 m = GARBAGE_YYYY.matcher(s);
205
206 if (m.matches()) {
207 Calendar cal = Calendar.getInstance();
208 String year = m.group(1);
209 cal.set(
210 Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0),
211 5, // month
212 15, // day
213 12, 0, 0);
214 return cal.getTime();
215 }
216
217 throw new IllegalArgumentException();
218 }
219
220 public static void main(String [] args) {
221 for (int i = 0; i < args.length; ++i) {
222 System.out.println(args[i] + ": " + guessDate(args[i]));
223 }
224 }
225 }
226 // end of file
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