merged 1.1 branch into head

[mir.git] / source / mir / util / DateTimeRoutines.java

diff --git a/source/mir/util/DateTimeRoutines.java b/source/mir/util/DateTimeRoutines.java
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+++ b/source/mir/util/DateTimeRoutines.java
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+/*
+ * Copyright (C) 2001-2006 The Mir-coders group
+ *
+ * This file is part of Mir.
+ *
+ * Mir is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Mir 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Mir; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * In addition, as a special exception, The Mir-coders gives permission to link
+ * the code of this program with  any library licensed under the Apache Software License,
+ * and distribute linked combinations including the two.  You must obey the
+ * GNU General Public License in all respects for all of the code used other than
+ * the above mentioned libraries.  If you modify this file, you may extend this
+ * exception to your version of the file, but you are not obligated to do so.
+ * If you do not wish to do so, delete this exception statement from your version.
+ */
+package mir.util;
+
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+
+public class DateTimeRoutines {
+  /**
+   * private parameter-less constructor to prevent construction
+   */
+  protected DateTimeRoutines() {
+  }
+
+  private final static String NUMBER = "[0-9]*";
+  private final static String TWODIGITNUMBER = "[0-9][0-9]";
+  
+  /**
+   * Function to parse a <a href="http://www.w3.org/TR/NOTE-datetime">W3CDTF</a> formatted string.
+   *
+   *
+   * YYYY[-MM[-DD[Thh:mm[:ss[.s*]]TZD]]]
+   *
+   * @param aString
+   * @return Date
+   */
+  public static Date parseW3CDTFString(String aString) throws UtilExc, UtilFailure {
+    try {
+      int year = 1;
+      int month = 1;
+      int day = 1;
+      int hour = 0;
+      int minute = 0;
+      int second = 0;
+      int millisecond = 0;
+      int houroffset = 0;
+      int minuteoffset = 0;
+      boolean negativeOffset = false;
+
+
+      SimpleParser parser = new SimpleParser(aString.trim());
+      String part = parser.parse(NUMBER);
+      year=Integer.parseInt(part);
+      if (parser.parses("-")) {
+        parser.skip("-");
+        part = parser.parse(NUMBER);
+        month = Integer.parseInt(part);
+        if (parser.parses("-")) {
+          parser.skip("-");
+          part = parser.parse(NUMBER);
+          day = Integer.parseInt(part);
+          if (parser.parses("T")) {
+            parser.skip("T");
+            part = parser.parse(NUMBER);
+            hour = Integer.parseInt(part);
+            parser.skip(":");
+            part = parser.parse(NUMBER);
+            minute = Integer.parseInt(part);
+            if (parser.parses(":")) {
+              parser.skip(":");
+              part = parser.parse(NUMBER);
+              second = Integer.parseInt(part);
+              if (parser.parses("\\.")) {
+                parser.skip("\\.");
+                part = parser.parse(NUMBER).substring(0,3);
+                while (part.length()<3)
+                  part = "0" + part;
+                millisecond = Integer.parseInt(part);
+              }
+            }
+            if (parser.parses("Z|\\+|-")) {
+              String sign = parser.parse("Z|\\+|-");
+              if (sign.equals("+") || sign.equals("-")) {
+                if (parser.parses(TWODIGITNUMBER)) {
+                  part = parser.parse(TWODIGITNUMBER);
+                  houroffset = Integer.parseInt(part);
+                }
+                if (parser.parses(":"))
+                  parser.skip(":");
+                if (parser.parses(TWODIGITNUMBER)) {
+                  part = parser.parse(TWODIGITNUMBER);
+                  minuteoffset = Integer.parseInt(part);
+                }
+
+                if (sign.equals("-")) {
+                  negativeOffset=true;
+                }
+              }
+            }
+          }
+        }
+      }
+
+
+      String timeZoneID = "GMT";
+      if (negativeOffset)
+        timeZoneID = timeZoneID+"-";
+      timeZoneID = timeZoneID + StringRoutines.padStringLeft(Integer.toString(houroffset), 2, '0') +
+                                StringRoutines.padStringLeft(Integer.toString(minuteoffset), 2, '0');
+
+
+      TimeZone zone = TimeZone.getTimeZone(timeZoneID);
+
+      Calendar calendar = new GregorianCalendar(zone);
+      calendar.set(year, month-1, day, hour, minute, second);
+      calendar.set(Calendar.MILLISECOND, millisecond);
+
+      return calendar.getTime();
+    }
+    catch (Throwable t) {
+//      logger.error("DateTimeFunctions.parseW3CDTFString: error parsing " + aString + ": " + t.toString());
+
+      throw new UtilFailure(t);
+    }
+  }
+
+  public static String advancedDateFormat(String aFormat, Date aDate, String aTimeZone) {
+    return advancedDateFormat(aFormat, aDate, TimeZone.getTimeZone(aTimeZone));
+  }
+
+  public static String advancedDateFormat(String aFormat, Date aDate, TimeZone aTimeZone) {
+    SimpleDateFormat simpleFormat = new SimpleDateFormat(aFormat);
+
+    simpleFormat.setTimeZone(aTimeZone);
+    return simpleFormat.format(aDate);
+  }
+
+  public static String dateToSortableString(Date aDate) {
+    return advancedDateFormat("yyyyMMddHHmmss", aDate, "GMT");
+  }
+}
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