[6380] | 1 | // License: GPL. For details, see LICENSE file.
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[1499] | 2 | package org.openstreetmap.josm.tools;
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| 3 |
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[1724] | 4 | import java.text.ParsePosition;
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| 5 | import java.text.SimpleDateFormat;
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[1499] | 6 | import java.util.Calendar;
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| 7 | import java.util.Date;
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| 8 | import java.util.GregorianCalendar;
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| 9 | import java.util.TimeZone;
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| 10 |
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| 11 | import javax.xml.datatype.DatatypeConfigurationException;
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| 12 | import javax.xml.datatype.DatatypeFactory;
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| 13 | import javax.xml.datatype.XMLGregorianCalendar;
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| 14 |
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[6643] | 15 | import org.openstreetmap.josm.Main;
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| 16 |
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[1499] | 17 | /**
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| 18 | * A static utility class dealing with parsing XML date quickly and formatting
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| 19 | * a date to the XML UTC format regardless of current locale.
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| 20 | *
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| 21 | * @author nenik
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| 22 | */
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| 23 | public final class DateUtils {
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| 24 | private DateUtils() {}
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| 25 | /**
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| 26 | * A shared instance used for conversion between individual date fields
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| 27 | * and long millis time. It is guarded against conflict by the class lock.
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| 28 | * The shared instance is used because the construction, together
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| 29 | * with the timezone lookup, is very expensive.
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| 30 | */
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| 31 | private static GregorianCalendar calendar = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
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| 32 | private static final DatatypeFactory XML_DATE;
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| 33 |
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| 34 | static {
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| 35 | calendar.setTimeInMillis(0);
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| 36 |
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| 37 | DatatypeFactory fact = null;
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| 38 | try {
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| 39 | fact = DatatypeFactory.newInstance();
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| 40 | } catch(DatatypeConfigurationException ce) {
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[6643] | 41 | Main.error(ce);
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[1499] | 42 | }
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| 43 | XML_DATE = fact;
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| 44 | }
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| 45 |
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| 46 | public static synchronized Date fromString(String str) {
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| 47 | // "2007-07-25T09:26:24{Z|{+|-}01:00}"
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| 48 | if (checkLayout(str, "xxxx-xx-xxTxx:xx:xxZ") ||
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[1724] | 49 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx") ||
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[1499] | 50 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx+xx:00") ||
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| 51 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx-xx:00")) {
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| 52 | calendar.set(
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| 53 | parsePart(str, 0, 4),
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| 54 | parsePart(str, 5, 2)-1,
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| 55 | parsePart(str, 8, 2),
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| 56 | parsePart(str, 11, 2),
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| 57 | parsePart(str, 14,2),
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| 58 | parsePart(str, 17, 2));
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| 59 |
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| 60 | if (str.length() == 25) {
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| 61 | int plusHr = parsePart(str, 20, 2);
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| 62 | int mul = str.charAt(19) == '+' ? -3600000 : 3600000;
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| 63 | calendar.setTimeInMillis(calendar.getTimeInMillis()+plusHr*mul);
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| 64 | }
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| 65 |
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| 66 | return calendar.getTime();
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| 67 | }
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[1724] | 68 | else if(checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxxZ") ||
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| 69 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxx") ||
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| 70 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxx+xx:00") ||
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| 71 | checkLayout(str, "xxxx-xx-xxTxx:xx:xx.xxx-xx:00")) {
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| 72 | calendar.set(
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| 73 | parsePart(str, 0, 4),
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| 74 | parsePart(str, 5, 2)-1,
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| 75 | parsePart(str, 8, 2),
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| 76 | parsePart(str, 11, 2),
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| 77 | parsePart(str, 14,2),
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| 78 | parsePart(str, 17, 2));
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| 79 | long millis = parsePart(str, 20, 3);
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| 80 | if (str.length() == 29)
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| 81 | millis += parsePart(str, 24, 2) * (str.charAt(23) == '+' ? -3600000 : 3600000);
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| 82 | calendar.setTimeInMillis(calendar.getTimeInMillis()+millis);
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[1499] | 83 |
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[1724] | 84 | return calendar.getTime();
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| 85 | }
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| 86 | else
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| 87 | {
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| 88 | // example date format "18-AUG-08 13:33:03"
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| 89 | SimpleDateFormat f = new SimpleDateFormat("dd-MMM-yy HH:mm:ss");
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| 90 | Date d = f.parse(str, new ParsePosition(0));
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| 91 | if(d != null)
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| 92 | return d;
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| 93 | }
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| 94 |
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[1499] | 95 | try {
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| 96 | return XML_DATE.newXMLGregorianCalendar(str).toGregorianCalendar().getTime();
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| 97 | } catch (Exception ex) {
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| 98 | return new Date();
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| 99 | }
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| 100 | }
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| 101 |
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| 102 | public static synchronized String fromDate(Date date) {
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| 103 | calendar.setTime(date);
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| 104 | XMLGregorianCalendar xgc = XML_DATE.newXMLGregorianCalendar(calendar);
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| 105 | if (calendar.get(Calendar.MILLISECOND) == 0) xgc.setFractionalSecond(null);
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| 106 | return xgc.toXMLFormat();
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| 107 | }
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| 108 |
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| 109 | private static boolean checkLayout(String text, String pattern) {
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| 110 | if (text.length() != pattern.length()) return false;
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| 111 | for (int i=0; i<pattern.length(); i++) {
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[1724] | 112 | char pc = pattern.charAt(i);
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| 113 | char tc = text.charAt(i);
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| 114 | if(pc == 'x' && tc >= '0' && tc <= '9') continue;
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| 115 | else if(pc == 'x' || pc != tc) return false;
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[1499] | 116 | }
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| 117 | return true;
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| 118 | }
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| 119 |
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| 120 | private static int parsePart(String str, int off, int len) {
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| 121 | return Integer.valueOf(str.substring(off, off+len));
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| 122 | }
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| 123 |
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| 124 | }
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