+++ /dev/null
-package tim.prune.data;
-
-import java.text.DateFormat;
-import java.text.ParsePosition;
-import java.text.SimpleDateFormat;
-import java.util.Calendar;
-import java.util.Date;
-import java.util.TimeZone;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-
-/**
- * Class to hold a UTC-based timestamp, for example of a track point.
- * When the selected timezone changes, this timestamp will keep its
- * numerical value but the date and time will change accordingly.
- */
-public class TimestampUtc extends Timestamp
-{
- private boolean _valid = false;
- private long _milliseconds = 0L;
- private String _text = null;
-
- private static final DateFormat ISO_8601_FORMAT_NOZ = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
- private static DateFormat[] ALL_DATE_FORMATS = null;
- private static Calendar CALENDAR = null;
- private static final Pattern ISO8601_FRACTIONAL_PATTERN
- = Pattern.compile("(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2}):(\\d{2})(?:[\\.,](\\d{1,3}))?(Z|[\\+-]\\d{2}(?::?\\d{2})?)?");
- // year month day T hour minute sec millisec Z or +/- hours : minutes
- private static final Pattern GENERAL_TIMESTAMP_PATTERN
- = Pattern.compile("(\\d{4})\\D(\\d{2})\\D(\\d{2})\\D(\\d{2})\\D(\\d{2})\\D(\\d{2})");
- private static long SECS_SINCE_1970 = 0L;
- private static long SECS_SINCE_GARTRIP = 0L;
- private static long MSECS_SINCE_1970 = 0L;
- private static long MSECS_SINCE_1990 = 0L;
- private static long TWENTY_YEARS_IN_SECS = 0L;
- private static final long GARTRIP_OFFSET = 631065600L;
-
- /** Identifier for the parsing strategy to use */
- private enum ParseType
- {
- NONE,
- ISO8601_FRACTIONAL,
- LONG,
- FIXED_FORMAT0,
- FIXED_FORMAT1,
- FIXED_FORMAT2,
- FIXED_FORMAT3,
- FIXED_FORMAT4,
- FIXED_FORMAT5,
- FIXED_FORMAT6,
- FIXED_FORMAT7,
- FIXED_FORMAT8,
- GENERAL_STRING
- }
-
- /** Array of parse types to loop through (first one is changed to last successful type) */
- private static ParseType[] ALL_PARSE_TYPES = {ParseType.NONE, ParseType.ISO8601_FRACTIONAL, ParseType.LONG,
- ParseType.FIXED_FORMAT0, ParseType.FIXED_FORMAT1, ParseType.FIXED_FORMAT2, ParseType.FIXED_FORMAT3,
- ParseType.FIXED_FORMAT4, ParseType.FIXED_FORMAT5, ParseType.FIXED_FORMAT6, ParseType.FIXED_FORMAT7,
- ParseType.FIXED_FORMAT8, ParseType.GENERAL_STRING};
-
- // Static block to initialise offsets
- static
- {
- CALENDAR = Calendar.getInstance();
- TimeZone gmtZone = TimeZone.getTimeZone("GMT");
- CALENDAR.setTimeZone(gmtZone);
- MSECS_SINCE_1970 = CALENDAR.getTimeInMillis();
- SECS_SINCE_1970 = MSECS_SINCE_1970 / 1000L;
- SECS_SINCE_GARTRIP = SECS_SINCE_1970 - GARTRIP_OFFSET;
- CALENDAR.add(Calendar.YEAR, -20);
- MSECS_SINCE_1990 = CALENDAR.getTimeInMillis();
- TWENTY_YEARS_IN_SECS = (MSECS_SINCE_1970 - MSECS_SINCE_1990) / 1000L;
- // Date formats
- ALL_DATE_FORMATS = new DateFormat[]
- {
- DEFAULT_DATETIME_FORMAT,
- new SimpleDateFormat("EEE MMM dd HH:mm:ss yyyy"),
- new SimpleDateFormat("HH:mm:ss dd MMM yyyy"),
- new SimpleDateFormat("dd MMM yyyy HH:mm:ss"),
- new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss"),
- new SimpleDateFormat("yyyy MMM dd HH:mm:ss"),
- new SimpleDateFormat("MMM dd, yyyy hh:mm:ss aa"),
- ISO_8601_FORMAT, ISO_8601_FORMAT_NOZ
- };
- for (DateFormat df : ALL_DATE_FORMATS)
- {
- df.setLenient(false);
- df.setTimeZone(gmtZone);
- }
- }
-
-
- /**
- * Constructor
- * @param inString String containing timestamp
- */
- public TimestampUtc(String inString)
- {
- _valid = false;
- _text = null;
- if (inString != null && !inString.equals(""))
- {
- // Try each of the parse types in turn
- for (ParseType type : ALL_PARSE_TYPES)
- {
- if (parseString(inString, type))
- {
- ALL_PARSE_TYPES[0] = type;
- _valid = true;
- _text = inString;
- return;
- }
- }
- }
- }
-
- /**
- * Try to parse the given string in the specified way
- * @param inString String to parse
- * @param inType parse type to use
- * @return true if successful
- */
- private boolean parseString(String inString, ParseType inType)
- {
- if (inString == null || inString.equals("")) {
- return false;
- }
- switch (inType)
- {
- case NONE: return false;
- case LONG:
- // Try to parse into a long
- try
- {
- long rawValue = Long.parseLong(inString.trim());
- _milliseconds = getMilliseconds(rawValue);
- return true;
- }
- catch (NumberFormatException nfe)
- {}
- break;
-
- case ISO8601_FRACTIONAL:
- final Matcher fmatcher = ISO8601_FRACTIONAL_PATTERN.matcher(inString);
- if (fmatcher.matches())
- {
- try {
- _milliseconds = getMilliseconds(Integer.parseInt(fmatcher.group(1)), // year
- Integer.parseInt(fmatcher.group(2)), // month
- Integer.parseInt(fmatcher.group(3)), // day
- Integer.parseInt(fmatcher.group(4)), // hour
- Integer.parseInt(fmatcher.group(5)), // minute
- Integer.parseInt(fmatcher.group(6)), // second
- fmatcher.group(7), // fractional seconds
- fmatcher.group(8)); // timezone, if any
- return true;
- }
- catch (NumberFormatException nfe) {}
- }
- break;
-
- case FIXED_FORMAT0: return parseString(inString, ALL_DATE_FORMATS[0]);
- case FIXED_FORMAT1: return parseString(inString, ALL_DATE_FORMATS[1]);
- case FIXED_FORMAT2: return parseString(inString, ALL_DATE_FORMATS[2]);
- case FIXED_FORMAT3: return parseString(inString, ALL_DATE_FORMATS[3]);
- case FIXED_FORMAT4: return parseString(inString, ALL_DATE_FORMATS[4]);
- case FIXED_FORMAT5: return parseString(inString, ALL_DATE_FORMATS[5]);
- case FIXED_FORMAT6: return parseString(inString, ALL_DATE_FORMATS[6]);
- case FIXED_FORMAT7: return parseString(inString, ALL_DATE_FORMATS[7]);
- case FIXED_FORMAT8: return parseString(inString, ALL_DATE_FORMATS[8]);
-
- case GENERAL_STRING:
- if (inString.length() == 19)
- {
- final Matcher matcher = GENERAL_TIMESTAMP_PATTERN.matcher(inString);
- if (matcher.matches())
- {
- try {
- _milliseconds = getMilliseconds(Integer.parseInt(matcher.group(1)),
- Integer.parseInt(matcher.group(2)),
- Integer.parseInt(matcher.group(3)),
- Integer.parseInt(matcher.group(4)),
- Integer.parseInt(matcher.group(5)),
- Integer.parseInt(matcher.group(6)),
- null, null); // no fractions of a second and no timezone
- return true;
- }
- catch (NumberFormatException nfe2) {} // parse shouldn't fail if matcher matched
- }
- }
- return false;
- }
- return false;
- }
-
-
- /**
- * Try to parse the given string with the given date format
- * @param inString String to parse
- * @param inDateFormat Date format to use
- * @return true if successful
- */
- private boolean parseString(String inString, DateFormat inDateFormat)
- {
- ParsePosition pPos = new ParsePosition(0);
- Date date = inDateFormat.parse(inString, pPos);
- if (date != null && inString.length() == pPos.getIndex()) // require use of _all_ the string, not just the beginning
- {
- CALENDAR.setTime(date);
- _milliseconds = CALENDAR.getTimeInMillis();
- return true;
- }
-
- return false;
- }
-
-
- /**
- * Constructor giving millis
- * @param inMillis milliseconds since 1970
- */
- public TimestampUtc(long inMillis)
- {
- _milliseconds = inMillis;
- _valid = true;
- }
-
-
- /**
- * Convert the given timestamp parameters into a number of milliseconds
- * @param inYear year
- * @param inMonth month, beginning with 1
- * @param inDay day of month, beginning with 1
- * @param inHour hour of day, 0-24
- * @param inMinute minute
- * @param inSecond seconds
- * @param inFraction fractions of a second
- * @param inTimezone timezone, if any
- * @return number of milliseconds
- */
- private static long getMilliseconds(int inYear, int inMonth, int inDay,
- int inHour, int inMinute, int inSecond, String inFraction, String inTimezone)
- {
- Calendar cal = Calendar.getInstance();
- // Timezone, if any
- if (inTimezone == null || inTimezone.equals("") || inTimezone.equals("Z")) {
- // No timezone, use zulu
- cal.setTimeZone(TimeZone.getTimeZone("GMT"));
- }
- else {
- // Timezone specified, pass to calendar
- cal.setTimeZone(TimeZone.getTimeZone("GMT" + inTimezone));
- }
- cal.set(Calendar.YEAR, inYear);
- cal.set(Calendar.MONTH, inMonth - 1);
- cal.set(Calendar.DAY_OF_MONTH, inDay);
- cal.set(Calendar.HOUR_OF_DAY, inHour);
- cal.set(Calendar.MINUTE, inMinute);
- cal.set(Calendar.SECOND, inSecond);
- int millis = 0;
- if (inFraction != null)
- {
- try {
- int frac = Integer.parseInt(inFraction);
- final int fracLen = inFraction.length();
- switch (fracLen) {
- case 1: millis = frac * 100; break;
- case 2: millis = frac * 10; break;
- case 3: millis = frac; break;
- }
- }
- catch (NumberFormatException nfe) {} // ignore errors, millis stay at 0
- }
- cal.set(Calendar.MILLISECOND, millis);
- return cal.getTimeInMillis();
- }
-
- /**
- * Convert the given long parameters into a number of milliseconds
- * @param inRawValue long value representing seconds / milliseconds
- * @return number of milliseconds
- */
- private static long getMilliseconds(long inRawValue)
- {
- // check for each format possibility and pick nearest
- long diff1 = Math.abs(SECS_SINCE_1970 - inRawValue);
- long diff2 = Math.abs(MSECS_SINCE_1970 - inRawValue);
- long diff3 = Math.abs(MSECS_SINCE_1990 - inRawValue);
- long diff4 = Math.abs(SECS_SINCE_GARTRIP - inRawValue);
-
- // Start off with "seconds since 1970" format
- long smallestDiff = diff1;
- long millis = inRawValue * 1000;
- // Now check millis since 1970
- if (diff2 < smallestDiff)
- {
- // milliseconds since 1970
- millis = inRawValue;
- smallestDiff = diff2;
- }
- // Now millis since 1990
- if (diff3 < smallestDiff)
- {
- // milliseconds since 1990
- millis = inRawValue + TWENTY_YEARS_IN_SECS * 1000L;
- smallestDiff = diff3;
- }
- // Lastly, check gartrip offset
- if (diff4 < smallestDiff)
- {
- // seconds since gartrip offset
- millis = (inRawValue + GARTRIP_OFFSET) * 1000L;
- }
- return millis;
- }
-
- /**
- * @return true if timestamp is valid
- */
- public boolean isValid()
- {
- return _valid;
- }
-
- /**
- * @return true if the timestamp has non-zero milliseconds
- */
- protected boolean hasMilliseconds()
- {
- return isValid() && (_milliseconds % 1000L) > 0;
- }
-
- /**
- * @return the milliseconds according to the given timezone
- */
- public long getMilliseconds(TimeZone inZone)
- {
- return _milliseconds;
- }
-
-
- /**
- * Add the given number of seconds offset
- * @param inOffset number of seconds to add/subtract
- */
- public void addOffsetSeconds(long inOffset)
- {
- _milliseconds += (inOffset * 1000L);
- _text = null;
- }
-
-
- /**
- * @param inFormat format of timestamp
- * @param inTimezone timezone to use
- * @return Description of timestamp in required format
- */
- public String getText(Format inFormat, TimeZone inTimezone)
- {
- // Use the cached text if possible
- if (isValid()
- && _text != null
- && inFormat == Format.ORIGINAL)
- {
- return _text;
- }
-
- // Nothing cached, so use the regular one
- return super.getText(inFormat, inTimezone);
- }
-
- /**
- * Utility method for formatting dates / times
- * @param inFormat formatter object
- * @param inTimezone timezone to use
- * @return formatted String
- */
- protected String format(DateFormat inFormat, TimeZone inTimezone)
- {
- CALENDAR.setTimeZone(TimeZone.getTimeZone("GMT"));
- inFormat.setTimeZone(inTimezone == null ? TimeZone.getTimeZone("GMT") : inTimezone);
-
- CALENDAR.setTimeInMillis(_milliseconds);
- return inFormat.format(CALENDAR.getTime());
- }
-
- /**
- * @return a Calendar object representing this timestamp
- */
- public Calendar getCalendar(TimeZone inZone)
- {
- Calendar cal = Calendar.getInstance();
- cal.setTimeZone(TimeZone.getTimeZone("GMT"));
- cal.setTimeInMillis(_milliseconds);
- return cal;
- }
-}
projects / GpsPrune.git / blobdiff