1 // Copyright (c) 1999-2004 Brian Wellington (bwelling (at) xbill.org) 2 3 package org.xbill.DNS; 4 5 /** 6 * Routines for converting time values to and from YYYYMMDDHHMMSS format. 7 * 8 * @author Brian Wellington 9 */ 10 11 import java.util.*; 12 import java.text.*; 13 14 final class FormattedTime { 15 16 private static NumberFormat w2, w4; 17 18 static { 19 w2 = new DecimalFormat(); 20 w2.setMinimumIntegerDigits(2); 21 22 w4 = new DecimalFormat(); 23 w4.setMinimumIntegerDigits(4); 24 w4.setGroupingUsed(false); 25 } 26 27 private 28 FormattedTime() {} 29 30 /** 31 * Converts a Date into a formatted string. 32 * @param date The Date to convert. 33 * @return The formatted string. 34 */ 35 public static String 36 format(Date date) { 37 Calendar c = new GregorianCalendar(TimeZone.getTimeZone("UTC")); 38 StringBuffer sb = new StringBuffer(); 39 40 c.setTime(date); 41 sb.append(w4.format(c.get(Calendar.YEAR))); 42 sb.append(w2.format(c.get(Calendar.MONTH)+1)); 43 sb.append(w2.format(c.get(Calendar.DAY_OF_MONTH))); 44 sb.append(w2.format(c.get(Calendar.HOUR_OF_DAY))); 45 sb.append(w2.format(c.get(Calendar.MINUTE))); 46 sb.append(w2.format(c.get(Calendar.SECOND))); 47 return sb.toString(); 48 } 49 50 /** 51 * Parses a formatted time string into a Date. 52 * @param s The string, in the form YYYYMMDDHHMMSS. 53 * @return The Date object. 54 * @throws TextParseExcetption The string was invalid. 55 */ 56 public static Date 57 parse(String s) throws TextParseException { 58 if (s.length() != 14) { 59 throw new TextParseException("Invalid time encoding: " + s); 60 } 61 62 Calendar c = new GregorianCalendar(TimeZone.getTimeZone("UTC")); 63 c.clear(); 64 try { 65 int year = Integer.parseInt(s.substring(0, 4)); 66 int month = Integer.parseInt(s.substring(4, 6)) - 1; 67 int date = Integer.parseInt(s.substring(6, 8)); 68 int hour = Integer.parseInt(s.substring(8, 10)); 69 int minute = Integer.parseInt(s.substring(10, 12)); 70 int second = Integer.parseInt(s.substring(12, 14)); 71 c.set(year, month, date, hour, minute, second); 72 } 73 catch (NumberFormatException e) { 74 throw new TextParseException("Invalid time encoding: " + s); 75 } 76 return c.getTime(); 77 } 78 79 } 80
