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1
26
28 package de.nava.informa.utils;
29
30 import java.net.URL  ;
31 import java.text.SimpleDateFormat ;
32 import java.util.Calendar ;
33 import java.util.Date ;
34 import java.util.Locale ;
35 import java.util.TimeZone ;
36
37 import org.apache.commons.logging.Log;
38 import org.apache.commons.logging.LogFactory;
39 import org.jdom.Element;
40 import org.jdom.Namespace;
41
42
47 public final class ParserUtils {
48
49 private static Log logger = LogFactory.getLog(ParserUtils.class);
50
51 private ParserUtils() {
52 }
53
54 public static URL getURL(String toURL) {
55 URL result = null;
56 try {
57 if ((toURL != null) && (toURL.trim().length() > 0))
58 result = new URL (toURL);
59 } catch (java.net.MalformedURLException e) {
60 logger.warn("Invalid URL " + toURL + " given.");
61 }
62 return result;
63 }
64
65 public static Namespace getDefaultNS(Element element) {
66 return getNamespace(element, "");
67 }
68
69 public static Namespace getNamespace(Element element, String prefix) {
70 Namespace ns = (prefix == null) ? element.getNamespace("") : element
80 .getNamespace(prefix);
81 return ns;
82 }
83
84 private static SimpleDateFormat [] dateFormats = null;
85
86 static {
87 final String [] possibleDateFormats = { "EEE, dd MMM yyyy HH:mm:ss z", "yyyy-MM-dd'T'HH:mm:ssZ", "yyyy-MM-dd'T'HH:mm:sszzzz",
89 "yyyy-MM-dd'T'HH:mm:ss z", "yyyy-MM-dd'T'HH:mm:ssz", "yyyy-MM-dd'T'HH:mm:ss", "yyyy-MM-dd'T'HHmmss.SSSz",
91
92 "yyyy-MM-dd'T'HH:mm:ss", "yyyy-MM-dd"};
93
94 dateFormats = new SimpleDateFormat [possibleDateFormats.length];
95 TimeZone gmtTZ = TimeZone.getTimeZone("GMT");
96 for (int i = 0; i < possibleDateFormats.length; i++) {
97 dateFormats[i] = new SimpleDateFormat (possibleDateFormats[i],
98 Locale.ENGLISH);
99 dateFormats[i].setTimeZone(gmtTZ);
100 }
101
102 }
103
104 private static SimpleDateFormat dfA = new SimpleDateFormat (
106 "EEE, dd MMM yyyy HH:mm:ss z", Locale.ENGLISH);
107
108 private static SimpleDateFormat dfB = new SimpleDateFormat (
110 "yyyy-MM-dd'T'HH:mm:ssZ");
111
112 private static SimpleDateFormat dfC = new SimpleDateFormat (
114 "yyyy-MM-dd'T'HH:mm:ss");
115
116 private static SimpleDateFormat dfD = new SimpleDateFormat ("yyyy-MM-dd");
118
119 public static Date getDate(String strdate) {
120 Date result = null;
121 strdate = strdate.trim();
122 if (strdate.length() > 10) {
123
124 if ((strdate.substring(strdate.length() - 5).indexOf("+") == 0 || strdate
126 .substring(strdate.length() - 5).indexOf("-") == 0)
127 && strdate.substring(strdate.length() - 5).indexOf(":") == 2) {
128
129 String sign = strdate.substring(strdate.length() - 5,
130 strdate.length() - 4);
131
132 strdate = strdate.substring(0, strdate.length() - 5) + sign + "0"
133 + strdate.substring(strdate.length() - 4);
134
137 }
138
139 String dateEnd = strdate.substring(strdate.length() - 6);
140
141 if ((dateEnd.indexOf("-") == 0 || dateEnd.indexOf("+") == 0)
144 && dateEnd.indexOf(":") == 3) {
145 if ("GMT".equals(strdate.substring(strdate.length() - 9, strdate
147 .length() - 6))) {
148 logger.debug("General time zone with offset, no change ");
149 } else {
150 String oldDate = strdate;
152 String newEnd = dateEnd.substring(0, 3) + dateEnd.substring(4);
153 strdate = oldDate.substring(0, oldDate.length() - 6) + newEnd;
154 }
156 }
157 }
158 int i = 0;
159 while (i < dateFormats.length) {
160 try {
161 result = dateFormats[i].parse(strdate);
162 break;
165 } catch (java.text.ParseException eA) {
166 logger.debug("parsing " + strdate + " ["
167 + dateFormats[i].toPattern() + "] without success, trying again.");
168 i++;
169 }
170 }
171
172 return result;
173 }
174
175
179 public static Date getDateOLD(String strdate) {
180 Date result = null;
181
182 try {
183 result = dfA.parse(strdate);
184 } catch (java.text.ParseException eA) {
185 logger.warn("Error parsing date (A): " + eA.getMessage());
186 try {
187 result = dfB.parse(strdate);
188 } catch (java.text.ParseException eB) {
189 logger.warn("Error parsing date (B): " + eB.getMessage());
190 try {
191 result = dfC.parse(strdate);
192 result = extractTimeZone(strdate, result);
194 } catch (java.text.ParseException eC) {
195 logger.warn("Error parsing date (C): " + eC.getMessage());
196 try {
197 result = dfD.parse(strdate);
198 } catch (java.text.ParseException eD) {
199 logger.warn("Error parsing date (D): " + eD.getMessage());
200 eD.printStackTrace();
201 }
202 }
203 }
204 }
205 if (logger.isDebugEnabled()) {
206 logger.debug("Parsing date '" + strdate + "' resulted in: " + result);
207 }
208 if (result == null) {
209 logger.warn("No appropiate date could be extracted from " + strdate);
210
211 }
212 return result;
213 }
214
215 private static Date extractTimeZone(String strdate, Date thedate) {
216 String tzSign = strdate.substring(strdate.length() - 6,
218 strdate.length() - 5);
219 String tzHour = strdate.substring(strdate.length() - 5,
220 strdate.length() - 3);
221 String tzMin = strdate.substring(strdate.length() - 2);
222 if (tzSign.equals("-") || tzSign.equals("+")) {
223 int h = Integer.parseInt(tzHour);
224 int m = Integer.parseInt(tzMin);
225 if (tzSign.equals("+")) {
227 h = -1 * h;
228 m = -1 * m;
229 }
230 Calendar cal = Calendar.getInstance();
231 cal.setTime(thedate);
232 cal.add(Calendar.HOUR_OF_DAY, h);
233 cal.add(Calendar.MINUTE, m);
234 cal.add(Calendar.MILLISECOND, localTimeDiff(cal.getTimeZone(), thedate));
236 thedate = cal.getTime();
237 }
238 return thedate;
239 }
240
241 private static int localTimeDiff(TimeZone tz, Date date) {
242 if (tz.inDaylightTime(date)) {
243 int dstSavings = 0;
244 if (tz.useDaylightTime()) {
245 dstSavings = 3600000; }
247 return tz.getRawOffset() + dstSavings;
248 }
249 return tz.getRawOffset();
250 }
251
252 public static String formatDate(Date aDate) {
253 return dfA.format(aDate);
254 }
255
256 public static String decodeBase64(String s) {
257 return Base64Decoder.decode(s);
259 }
260
261 public static String unEscape(String s) {
262 String value = s;
263 value = value.replaceAll("<", "<");
264 value = value.replaceAll(">", ">");
265 value = value.replaceAll("&", "&");
266 value = value.replaceAll(""", "\"");
267 value = value.replaceAll("'", "'");
268 return value;
269 }
270
271 } |
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