date.java

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   * @deprecated Use DateFormat.parse(String)
   */
  public static long parse(String string)
  {
    // Initialize date/time fields before parsing begins.
    int year = -1;
    int month = -1;
    int day = -1;
    int hour = -1;
    int minute = -1;
    int second = -1;
    int timezone = 0;
    boolean localTimezone = true;

    // Trim out any nested stuff in parentheses now to make parsing easier.
    StringBuffer buf = new StringBuffer();
    int off = 0;
    int openParenOffset, tmpMonth;
    while ((openParenOffset = string.indexOf('(', off)) >= 0)
      {
	// Copy part of string leading up to open paren.
	buf.append(string.substring(off, openParenOffset));
	off = skipParens(string, openParenOffset);
      }
    buf.append(string.substring(off));

    // Make all chars upper case to simplify comparisons later.
    // Also ignore commas; treat them as delimiters.
    StringTokenizer strtok =
      new StringTokenizer(buf.toString().toUpperCase(), " \t\n\r,");

    while (strtok.hasMoreTokens())
      {
	String tok = strtok.nextToken();
	char firstch = tok.charAt(0);
	if ((firstch == '+' || firstch == '-') && year >= 0)
	  {
	    timezone = parseTz(tok, firstch);
	    localTimezone = false;
	  }
	else if (firstch >= '0' && firstch <= '9')
	  {
	    while (tok != null && tok.length() > 0)
	      {
	        // A colon or slash may be valid in the number.
	        // Find the first of these before calling parseInt.
	        int colon = tok.indexOf(':');
	        int slash = tok.indexOf('/');
	        int hyphen = tok.indexOf('-');
		// We choose tok.length initially because it makes
		// processing simpler.
	        int punctOffset = tok.length();
		if (colon >= 0)
		  punctOffset = Math.min(punctOffset, colon);
	        if (slash >= 0)
	          punctOffset = Math.min(punctOffset, slash);
	        if (hyphen >= 0)
	          punctOffset = Math.min(punctOffset, hyphen);
		// Following code relies on -1 being the exceptional
		// case.
		if (punctOffset == tok.length())
		  punctOffset = -1;

	        int num;
	        try
	          {
		    num = Integer.parseInt(punctOffset < 0 ? tok :
					   tok.substring(0, punctOffset));
	          }
	        catch (NumberFormatException ex)
	          {
		    throw new IllegalArgumentException(tok);
	          }

		// TBD: Spec says year can be followed by a slash.  That might
		// make sense if using YY/MM/DD formats, but it would fail in
		// that format for years <= 70.  Also, what about 1900?  That
		// is interpreted as the year 3800; seems that the comparison
		// should be num >= 1900 rather than just > 1900.
		// What about a year of 62 - 70?  (61 or less could be a (leap)
		// second).  70/MM/DD cause an exception but 71/MM/DD is ok
		// even though there's no ambiguity in either case.
		// For the parse method, the spec as written seems too loose.
		// Until shown otherwise, we'll follow the spec as written.
	        if (num > 70 && (punctOffset < 0 || punctOffset == slash))
		  year = num > 1900 ? num - 1900 : num;
		else if (punctOffset > 0 && punctOffset == colon)
		  {
		    if (hour < 0)
		      hour = num;
		    else
		      minute = num;
		  }
		else if (punctOffset > 0 && punctOffset == slash)
		  {
		    if (month < 0)
		      month = num - 1;
		    else
		      day = num;
		  }
		else if (hour >= 0 && minute < 0)
		  minute = num;
		else if (minute >= 0 && second < 0)
		  second = num;
		else if (day < 0)
		  day = num;
		else
		  throw new IllegalArgumentException(tok);

		// Advance string if there's more to process in this token.
		if (punctOffset < 0 || punctOffset + 1 >= tok.length())
		  tok = null;
		else
		  tok = tok.substring(punctOffset + 1);
	      }
	  }
	else if (firstch >= 'A' && firstch <= 'Z')
	  {
	    if (tok.equals("AM"))
	      {
		if (hour < 1 || hour > 12)
		  throw new IllegalArgumentException(tok);
		if (hour == 12)
		  hour = 0;
	      }
	    else if (tok.equals("PM"))
	      {
		if (hour < 1 || hour > 12)
		  throw new IllegalArgumentException(tok);
		if (hour < 12)
		  hour += 12;
	      }
	    else if (parseDayOfWeek(tok))
	      ; // Ignore it; throw the token away.
	    else if (tok.equals("UT") || tok.equals("UTC") || tok.equals("GMT"))
	      localTimezone = false;
	    else if (tok.startsWith("UT") || tok.startsWith("GMT"))
	      {
		int signOffset = 3;
		if (tok.charAt(1) == 'T' && tok.charAt(2) != 'C')
		  signOffset = 2;

	        char sign = tok.charAt(signOffset);
		if (sign != '+' && sign != '-')
		  throw new IllegalArgumentException(tok);

	        timezone = parseTz(tok.substring(signOffset), sign);
	        localTimezone = false;
	      }
	    else if ((tmpMonth = parseMonth(tok)) >= 0)
	      month = tmpMonth;
	    else if (tok.length() == 3 && tok.charAt(2) == 'T')
	      {
		// Convert timezone offset from hours to minutes.
		char ch = tok.charAt(0);
		if (ch == 'E')
		  timezone = -5 * 60;
		else if (ch == 'C')
		  timezone = -6 * 60;
		else if (ch == 'M')
		  timezone = -7 * 60;
		else if (ch == 'P')
		  timezone = -8 * 60;
		else
		  throw new IllegalArgumentException(tok);

		// Shift 60 minutes for Daylight Savings Time.
		if (tok.charAt(1) == 'D')
		  timezone += 60;
		else if (tok.charAt(1) != 'S')
		  throw new IllegalArgumentException(tok);

	        localTimezone = false;
	      }
	    else
	      throw new IllegalArgumentException(tok);
	  }
	else
	  throw new IllegalArgumentException(tok);
      }

    // Unspecified minutes and seconds should default to 0.
    if (minute < 0)
      minute = 0;
    if (second < 0)
      second = 0;

    // Throw exception if any other fields have not been recognized and set.
    if (year < 0 || month < 0 || day < 0 || hour < 0)
      throw new IllegalArgumentException("Missing field");

    // Return the time in either local time or relative to GMT as parsed.
    // If no time-zone was specified, get the local one (in minutes) and
    // convert to milliseconds before adding to the UTC.
    return UTC(year, month, day, hour, minute, second) + (localTimezone ?
		new Date(year, month, day).getTimezoneOffset() * 60 * 1000:
		-timezone * 60 * 1000);
  }

  /**
   * @return the year minus 1900 represented by this date object.
   * @deprecated Use Calendar instead of Date, and use get(Calendar.YEAR)
   * instead.  Note about the 1900 difference in year.
   */
  public int getYear()
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    return cal.get(Calendar.YEAR) - 1900;
  }

  /**
   * Sets the year to year minus 1900, not changing the other fields.
   * @param year the year minus 1900.
   * @deprecated Use Calendar instead of Date, and use
   * set(Calendar.YEAR, year) instead.  Note about the 1900
   * difference in year.  
   */
  public void setYear(int year)
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    cal.set(Calendar.YEAR, 1900 + year);
    time = cal.getTimeInMillis();
  }

  /**
   * @return the month represented by this date object (zero based).
   * @deprecated Use Calendar instead of Date, and use get(Calendar.MONTH)
   * instead.
   */
  public int getMonth()
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    return cal.get(Calendar.MONTH);
  }

  /**
   * Sets the month to the given value, not changing the other fields.
   * @param month the month, zero based.
   * @deprecated Use Calendar instead of Date, and use
   * set(Calendar.MONTH, month) instead. 
   */
  public void setMonth(int month)
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    cal.set(Calendar.MONTH, month);
    time = cal.getTimeInMillis();
  }

  /**
   * @return the day of month represented by this date object.
   * @deprecated Use Calendar instead of Date, and use get(Calendar.DATE)
   * instead.
   */
  public int getDate()
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    return cal.get(Calendar.DATE);
  }

  /**
   * Sets the date to the given value, not changing the other fields.
   * @param date the date.
   * @deprecated Use Calendar instead of Date, and use
   * set(Calendar.DATE, date) instead. 
   */
  public void setDate(int date)
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    cal.set(Calendar.DATE, date);
    time = cal.getTimeInMillis();
  }

  /**
   * @return the day represented by this date object.
   * @deprecated Use Calendar instead of Date, and use get(Calendar.DAY_OF_WEEK)
   * instead.
   */
  public int getDay()
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    // For Calendar, Sunday is 1.  For Date, Sunday is 0.
    return cal.get(Calendar.DAY_OF_WEEK) - 1;
  }

  /**
   * @return the hours represented by this date object.
   * @deprecated Use Calendar instead of Date, and use get(Calendar.HOUR_OF_DAY)
   * instead.
   */
  public int getHours()
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    return cal.get(Calendar.HOUR_OF_DAY);
  }

  /**
   * Sets the hours to the given value, not changing the other fields.
   * @param hours the hours.
   * @deprecated Use Calendar instead of Date, and use
   * set(Calendar.HOUR_OF_DAY, hours) instead. 
   */
  public void setHours(int hours)
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    cal.set(Calendar.HOUR_OF_DAY, hours);
    time = cal.getTimeInMillis();
  }

  /**
   * @return the minutes represented by this date object.
   * @deprecated Use Calendar instead of Date, and use get(Calendar.MINUTE)
   * instead.
   */
  public int getMinutes()
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    return cal.get(Calendar.MINUTE);
  }

  /**
   * Sets the minutes to the given value, not changing the other fields.
   * @param minutes the minutes.
   * @deprecated Use Calendar instead of Date, and use
   * set(Calendar.MINUTE, minutes) instead. 
   */
  public void setMinutes(int minutes)
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    cal.set(Calendar.MINUTE, minutes);
    time = cal.getTimeInMillis();
  }

  /**
   * @return the seconds represented by this date object.
   * @deprecated Use Calendar instead of Date, and use get(Calendar.SECOND)
   * instead.
   */
  public int getSeconds()
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    return cal.get(Calendar.SECOND);
  }

  /**
   * Sets the seconds to the given value, not changing the other fields.
   * @param seconds the seconds.
   * @deprecated Use Calendar instead of Date, and use
   * set(Calendar.SECOND, seconds) instead. 
   */
  public void setSeconds(int seconds)
  {
    Calendar cal = Calendar.getInstance();
    cal.setTimeInMillis(time);
    cal.set(Calendar.SECOND, seconds);
    time = cal.getTimeInMillis();
  }

  /**
   * Reads an Object from the stream.
   */
  private void readObject(java.io.ObjectInputStream input)
    throws java.io.IOException, ClassNotFoundException
  {
    input.defaultReadObject();
    time = input.readLong();
  }

  /**
   * Writes an Object to the stream.
   * @serialdata A long value representing the offset from the epoch
   * in milliseconds.  This is the same value that is returned by the
   * method getTime().
   */
  private void writeObject(java.io.ObjectOutputStream output)
    throws java.io.IOException
  {
    output.defaultWriteObject();
    output.writeLong(time);
  }
}