private DateTimeData addDuration(DateTimeData date, DateTimeData addto, DateTimeData duration) {
// REVISIT: some code could be shared between normalize() and this method,
// however is it worth moving it? The structures are different...
//
resetDateObj(duration);
// add months (may be modified additionaly below)
int temp = addto.month + date.month;
duration.month = modulo(temp, 1, 13);
int carry = fQuotient(temp, 1, 13);
// add years (may be modified additionaly below)
duration.year = addto.year + date.year + carry;
// add seconds
double dtemp = addto.second + date.second;
carry = (int) Math.floor(dtemp / 60);
duration.second = dtemp - carry * 60;
// add minutes
temp = addto.minute + date.minute + carry;
carry = fQuotient(temp, 60);
duration.minute = mod(temp, 60, carry);
// add hours
temp = addto.hour + date.hour + carry;
carry = fQuotient(temp, 24);
duration.hour = mod(temp, 24, carry);
duration.day = addto.day + date.day + carry;
while (true) {
temp = maxDayInMonthFor(duration.year, duration.month);
if (duration.day < 1) { // original duration was negative
duration.day = duration.day + maxDayInMonthFor(duration.year, duration.month - 1);
carry = -1;
} else if (duration.day > temp) {
duration.day = duration.day - temp;
carry = 1;
} else {
break;
}
temp = duration.month + carry;
duration.month = modulo(temp, 1, 13);
duration.year = duration.year + fQuotient(temp, 1, 13);
}
duration.utc = 'Z';
return duration;
}
/**
* Parses date CCYY-MM
*
* @param buffer
* @param start start position
* @param end end position
* @param date
* @exception RuntimeException
*/
protected int getYearMonth(String buffer, int start, int end, DateTimeData date)
throws RuntimeException {
if (buffer.charAt(0) == '-') {
// REVISIT: date starts with preceding '-' sign
// do we have to do anything with it?
//
start++;
}
int i = indexOf(buffer, start, end, '-');
if (i == -1) throw new RuntimeException("Year separator is missing or misplaced");
int length = i - start;
if (length < 4) {
throw new RuntimeException("Year must have 'CCYY' format");
} else if (length > 4 && buffer.charAt(start) == '0') {
throw new RuntimeException(
"Leading zeros are required if the year value would otherwise have fewer than four digits; otherwise they are forbidden");
}
date.year = parseIntYear(buffer, i);
if (buffer.charAt(i) != '-') {
throw new RuntimeException("CCYY must be followed by '-' sign");
}
start = ++i;
i = start + 2;
date.month = parseInt(buffer, start, i);
return i; // fStart points right after the MONTH
}
/**
* Validates given date/time object accoring to W3C PR Schema [D.1 ISO 8601 Conventions]
*
* @param data
*/
protected void validateDateTime(DateTimeData data) {
// REVISIT: should we throw an exception for not valid dates
// or reporting an error message should be sufficient?
/** XML Schema 1.1 - RQ-123: Allow year 0000 in date related types. */
if (!Constants.SCHEMA_1_1_SUPPORT && data.year == 0) {
throw new RuntimeException("The year \"0000\" is an illegal year value");
}
if (data.month < 1 || data.month > 12) {
throw new RuntimeException("The month must have values 1 to 12");
}
// validate days
if (data.day > maxDayInMonthFor(data.year, data.month) || data.day < 1) {
throw new RuntimeException("The day must have values 1 to 31");
}
// validate hours
if (data.hour > 23 || data.hour < 0) {
if (data.hour == 24 && data.minute == 0 && data.second == 0) {
data.hour = 0;
if (++data.day > maxDayInMonthFor(data.year, data.month)) {
data.day = 1;
if (++data.month > 12) {
data.month = 1;
if (Constants.SCHEMA_1_1_SUPPORT) {
++data.year;
} else if (++data.year == 0) {
data.year = 1;
}
}
}
} else {
throw new RuntimeException("Hour must have values 0-23, unless 24:00:00");
}
}
// validate
if (data.minute > 59 || data.minute < 0) {
throw new RuntimeException("Minute must have values 0-59");
}
// validate
if (data.second >= 60 || data.second < 0) {
throw new RuntimeException("Second must have values 0-59");
}
// validate
if (data.timezoneHr > 14 || data.timezoneHr < -14) {
throw new RuntimeException("Time zone should have range -14:00 to +14:00");
} else {
if ((data.timezoneHr == 14 || data.timezoneHr == -14) && data.timezoneMin != 0)
throw new RuntimeException("Time zone should have range -14:00 to +14:00");
else if (data.timezoneMin > 59 || data.timezoneMin < -59)
throw new RuntimeException("Minute must have values 0-59");
}
}
private void cloneDate(DateTimeData finalValue, DateTimeData tempDate) {
tempDate.year = finalValue.year;
tempDate.month = finalValue.month;
tempDate.day = finalValue.day;
tempDate.hour = finalValue.hour;
tempDate.minute = finalValue.minute;
tempDate.second = finalValue.second;
tempDate.utc = finalValue.utc;
tempDate.timezoneHr = finalValue.timezoneHr;
tempDate.timezoneMin = finalValue.timezoneMin;
}
/**
* Resets object representation of date/time
*
* @param data date/time object
*/
protected void resetDateObj(DateTimeData data) {
data.year = 0;
data.month = 0;
data.day = 0;
data.hour = 0;
data.minute = 0;
data.second = 0;
data.utc = 0;
data.timezoneHr = 0;
data.timezoneMin = 0;
}
/**
* If timezone present - normalize dateTime [E Adding durations to dateTimes]
*
* @param date CCYY-MM-DDThh:mm:ss+03
*/
protected void normalize(DateTimeData date) {
// REVISIT: we have common code in addDuration() for durations
// should consider reorganizing it.
//
// add minutes (from time zone)
int negate = -1;
if (DEBUG) {
System.out.println("==>date.minute" + date.minute);
System.out.println("==>date.timezoneMin" + date.timezoneMin);
}
int temp = date.minute + negate * date.timezoneMin;
int carry = fQuotient(temp, 60);
date.minute = mod(temp, 60, carry);
if (DEBUG) {
System.out.println("==>carry: " + carry);
}
// add hours
temp = date.hour + negate * date.timezoneHr + carry;
carry = fQuotient(temp, 24);
date.hour = mod(temp, 24, carry);
if (DEBUG) {
System.out.println("==>date.hour" + date.hour);
System.out.println("==>carry: " + carry);
}
date.day = date.day + carry;
while (true) {
temp = maxDayInMonthFor(date.year, date.month);
if (date.day < 1) {
date.day = date.day + maxDayInMonthFor(date.year, date.month - 1);
carry = -1;
} else if (date.day > temp) {
date.day = date.day - temp;
carry = 1;
} else {
break;
}
temp = date.month + carry;
date.month = modulo(temp, 1, 13);
date.year = date.year + fQuotient(temp, 1, 13);
if (date.year == 0 && !Constants.SCHEMA_1_1_SUPPORT) {
date.year = (date.timezoneHr < 0 || date.timezoneMin < 0) ? 1 : -1;
}
}
date.utc = 'Z';
}
/**
* Parses, validates and computes normalized version of duration object
*
* @param str The lexical representation of duration object PnYn MnDTnH nMnS
* @param durationType
* @return normalized date representation
* @exception SchemaDateTimeException Invalid lexical representation
*/
protected DateTimeData parse(String str, int durationType) throws SchemaDateTimeException {
int len = str.length();
DateTimeData date = new DateTimeData(str, this);
int start = 0;
char c = str.charAt(start++);
if (c != 'P' && c != '-') {
throw new SchemaDateTimeException();
} else {
date.utc = (c == '-') ? '-' : 0;
if (c == '-' && str.charAt(start++) != 'P') {
throw new SchemaDateTimeException();
}
}
int negate = 1;
// negative duration
if (date.utc == '-') {
negate = -1;
}
// at least one number and designator must be seen after P
boolean designator = false;
int endDate = indexOf(str, start, len, 'T');
if (endDate == -1) {
endDate = len;
} else if (durationType == YEARMONTHDURATION_TYPE) {
throw new SchemaDateTimeException();
}
// find 'Y'
int end = indexOf(str, start, endDate, 'Y');
if (end != -1) {
if (durationType == DAYTIMEDURATION_TYPE) {
throw new SchemaDateTimeException();
}
// scan year
date.year = negate * parseInt(str, start, end);
start = end + 1;
designator = true;
}
end = indexOf(str, start, endDate, 'M');
if (end != -1) {
if (durationType == DAYTIMEDURATION_TYPE) {
throw new SchemaDateTimeException();
}
// scan month
date.month = negate * parseInt(str, start, end);
start = end + 1;
designator = true;
}
end = indexOf(str, start, endDate, 'D');
if (end != -1) {
if (durationType == YEARMONTHDURATION_TYPE) {
throw new SchemaDateTimeException();
}
// scan day
date.day = negate * parseInt(str, start, end);
start = end + 1;
designator = true;
}
if (len == endDate && start != len) {
throw new SchemaDateTimeException();
}
if (len != endDate) {
// scan hours, minutes, seconds
// REVISIT: can any item include a decimal fraction or only seconds?
//
end = indexOf(str, ++start, len, 'H');
if (end != -1) {
// scan hours
date.hour = negate * parseInt(str, start, end);
start = end + 1;
designator = true;
}
end = indexOf(str, start, len, 'M');
if (end != -1) {
// scan min
date.minute = negate * parseInt(str, start, end);
start = end + 1;
designator = true;
}
end = indexOf(str, start, len, 'S');
if (end != -1) {
// scan seconds
date.second = negate * parseSecond(str, start, end);
start = end + 1;
designator = true;
}
// no additional data shouls appear after last item
// P1Y1M1DT is illigal value as well
if (start != len || str.charAt(--start) == 'T') {
throw new SchemaDateTimeException();
}
}
if (!designator) {
throw new SchemaDateTimeException();
}
return date;
}