public static String castToString(DateTime dt, int format) {
if (format == DateTimeFormat_W3_dateTime) /* Format as schema dateTime */ {
return dt.toString();
}
if (format == DateTimeFormat_W3_date) /* Format as schema date */ {
return dt.toDateString(true);
}
if (format == DateTimeFormat_W3_time) /* Format as schema time */ {
return dt.toTimeString();
}
if (format == DateTimeFormat_W3_gYear) /* Format as schema gYear */ {
String result = "";
int year = dt.getYear();
if (year < 0) {
result += '-';
year = -year;
}
result += formatNumber(year, 4);
if (dt.hasTimezone() != CalendarBase.TZ_MISSING)
result = formatTimezone(dt.getTimezoneOffset());
return result;
}
if (format == DateTimeFormat_W3_gYearMonth) /* Format as schema gYearMonth */ {
String result = "";
int year = dt.getYear();
int month = dt.getMonth();
if (year < 0) {
result += '-';
year = -year;
}
result += formatNumber(year, 4);
result += '-';
result += formatNumber(month, 2);
if (dt.hasTimezone() != CalendarBase.TZ_MISSING)
result += formatTimezone(dt.getTimezoneOffset());
return result;
}
if (format == DateTimeFormat_W3_gMonth) /* Format as schema gMonth */ {
String result = "--";
int month = dt.getMonth();
result += formatNumber(month, 2);
if (dt.hasTimezone() != CalendarBase.TZ_MISSING) formatTimezone(dt.getTimezoneOffset());
return result;
}
if (format == DateTimeFormat_W3_gMonthDay) /* Format as schema gMonthDay */ {
String result = "--";
int month = dt.getMonth();
int day = dt.getDay();
result += formatNumber(month, 2);
result += '-';
result += formatNumber(day, 2);
if (dt.hasTimezone() != CalendarBase.TZ_MISSING)
result += formatTimezone(dt.getTimezoneOffset());
return result;
}
if (format == DateTimeFormat_W3_gDay) /* Format as schema gDay */ {
String result = "---";
int day = dt.getDay();
result += formatNumber(day, 2);
if (dt.hasTimezone() != CalendarBase.TZ_MISSING)
result += formatTimezone(dt.getTimezoneOffset());
return result;
}
if (format
== DateTimeFormat_S_DateTime) /* Format as standard DateTime "YYYY-MM-DD HH:MM:SS" */ {
StringBuffer s = new StringBuffer();
s.append(dt.toDateString());
s.append(" ");
s.append(dt.toTimeString());
return s.toString();
}
if (format == DateTimeFormat_S_Seconds) /* Format as number of seconds since epoch */ {
String result = "";
long milliseconds = dt.getTimeValue();
if (milliseconds < 0) {
result += '-';
milliseconds = -milliseconds;
}
result += formatNumber(milliseconds / 1000, 1);
result += formatFraction(milliseconds % 1000, 7);
if (dt.hasTimezone() != CalendarBase.TZ_MISSING)
result += formatTimezone(dt.getTimezoneOffset());
return result;
}
if (format == DateTimeFormat_S_Days) /* Format as number of days since epoch */ {
String result = "";
long milliseconds = dt.getTimeValue();
if (milliseconds < 0) {
result += '-';
milliseconds = -milliseconds;
}
result += formatNumber(milliseconds / (86400 * 1000), 1);
result += formatFraction(milliseconds % (86400 * 1000), 7);
if (dt.hasTimezone() != CalendarBase.TZ_MISSING)
result += formatTimezone(dt.getTimezoneOffset());
return result;
}
throw new IllegalArgumentException("Unsupported datetime format.");
}
public static BigInteger GYearToInteger(DateTime dt) {
return BigInteger.valueOf((long) dt.getYear());
}