/**
* Returns a day count for the specified years, months and days. All values must be specified in
* their internal representation (undefined values are supported, too). Algorithm is derived from
* J R Stockton (http://www.merlyn.demon.co.uk/daycount.htm).
*
* @param year year
* @param month month
* @param day days
* @return days
*/
private static BigDecimal days(final long year, final int month, final int day) {
final long y = year - (month < 2 ? 1 : 0);
final int m = month + (month < 2 ? 13 : 1);
final int d = day + 1;
return BD365
.multiply(BigDecimal.valueOf(y))
.add(BigDecimal.valueOf(y / 4 - y / 100 + y / 400 - 92 + d + (153 * m - 2) / 5));
}
public static ArrayList<Symbol> toSymbols(String expression) {
ArrayList<Symbol> symbols = new ArrayList<>();
for (int i = 0; i < expression.length(); i++) {
char c = expression.charAt(i);
if (isBracket(c)) {
// bracket
symbols.add(new Symbol(c));
} else if (c == ',') {
symbols.add(new Symbol(c));
} else if (isOperator(c)) {
if (c == '-') {
if (i == 0) {
// must be first +/-, so add 0
symbols.add(new Symbol(BigDecimal.valueOf(0)));
symbols.add(new Symbol(c));
} else {
char previous = expression.charAt(i - 1);
if ((previous == ')') || isNumber(String.valueOf(previous))) {
// must be "minus"
// e.g. sin(3)-5, 100-5,
symbols.add(new Symbol(c));
} else if ((previous == '(') || (previous == ',')) {
// must be "negative"
// e.g. (-3+5)/2
symbols.add(new Symbol(BigDecimal.valueOf(0)));
symbols.add(new Symbol(c));
} else if ((previous == '*') || (previous == '/') || (previous == '^')) {
int end = Symbol.getNumberEndAt(i + 1, expression);
symbols.add(new Symbol(new BigDecimal(expression.substring(i, end))));
i = end - 1;
}
}
} else {
symbols.add(new Symbol(c));
}
} else if (Character.isLetter(c)) {
// function
int end = Symbol.getFunctionEndAt(i, expression);
symbols.add(new Symbol(expression.substring(i, end)));
i = end - 1;
} else if (Character.isDigit(c)) {
int end = Symbol.getNumberEndAt(i, expression);
String number = expression.substring(i, end);
symbols.add(new Symbol(new BigDecimal(number)));
i = end - 1;
}
}
return symbols;
}
/**
* Returns the date in seconds.
*
* @return seconds
*/
final BigDecimal seconds() {
int z = tz;
if (z == Short.MAX_VALUE) {
// [CG] XQuery, DateTime: may be removed
final long n = System.currentTimeMillis();
z = Calendar.getInstance().getTimeZone().getOffset(n) / 60000;
}
return (sec == null ? BigDecimal.ZERO : sec)
.add(BigDecimal.valueOf(Math.max(0, hou) * 3600 + Math.max(0, min) * 60 - z * 60));
}
/**
* Converts a day count into year, month and day components. Algorithm is derived from J R
* Stockton (http://www.merlyn.demon.co.uk/daycount.htm).
*
* @param days day count
* @return result array
*/
private static long[] ymd(final BigDecimal days) {
BigDecimal d = days;
BigDecimal t =
d.add(BD36525).multiply(BD4).divideToIntegralValue(BD146097).subtract(BigDecimal.ONE);
BigDecimal y = BD100.multiply(t);
d = d.subtract(BD36524.multiply(t).add(t.divideToIntegralValue(BD4)));
t = d.add(BD366).multiply(BD4).divideToIntegralValue(BD1461).subtract(BigDecimal.ONE);
y = y.add(t);
d = d.subtract(BD365.multiply(t).add(t.divideToIntegralValue(BD4)));
final BigDecimal m = BD5.multiply(d).add(BD2).divideToIntegralValue(BD153);
d = d.subtract(BD153.multiply(m).add(BD2).divideToIntegralValue(BD5));
long mm = m.longValue();
if (mm > 9) {
mm -= 12;
y = y.add(BigDecimal.ONE);
}
return new long[] {y.subtract(BigDecimal.valueOf(ADD_NEG)).longValue(), mm + 2, d.longValue()};
}
/**
* Adjusts the timezone.
*
* @param zone timezone
* @param spec indicates if zone has been specified (may be {@code null})
* @param ii input info
* @throws QueryException query exception
*/
void tz(final DTDur zone, final boolean spec, final InputInfo ii) throws QueryException {
final short t;
if (spec && zone == null) {
t = Short.MAX_VALUE;
} else {
if (zone == null) {
final Calendar c = Calendar.getInstance();
t = (short) ((c.get(Calendar.ZONE_OFFSET) + c.get(Calendar.DST_OFFSET)) / 60000);
} else {
t = (short) (zone.min() + zone.hou() * 60);
if (zone.sec().signum() != 0) throw ZONESEC_X.get(ii, zone);
if (Math.abs(t) > 60 * 14 || zone.day() != 0) throw INVALZONE_X.get(ii, zone);
}
// change time if two competing time zones exist
if (tz != Short.MAX_VALUE) add(BigDecimal.valueOf(60L * (t - tz)));
}
tz = t;
}
/**
* Adds the specified dayTime duration.
*
* @param add value to be added
*/
private void add(final BigDecimal add) {
// normalized modulo: sc % 60 vs. (-sc + sc % 60 + 60 + sc) % 60
final BigDecimal sc = sec().add(add);
sec =
sc.signum() >= 0
? sc.remainder(BD60)
: sc.negate().add(sc.remainder(BD60)).add(BD60).add(sc).remainder(BD60);
final long mn = Math.max(min(), 0) + div(sc.longValue(), 60);
min = (byte) mod(mn, 60);
final long ho = Math.max(hou, 0) + div(mn, 60);
hou = (byte) mod(ho, 24);
final long da = div(ho, 24);
final long[] ymd = ymd(days().add(BigDecimal.valueOf(da)));
yea = ymd[0];
mon = (byte) ymd[1];
day = (byte) ymd[2];
}
/**
* Type converts values to other classes. For example an Integer can be converted to a Long.
*
* @param <T> Data Type.
* @param value The value to be converted.
* @param to The class to be converted to. Must be one of the Java types corresponding to the
* DataTypes.
* @return The converted value.
* @throws TypeMismatchException Thrown desired class is incompatible with the source class.
* @throws OverflowException Thrown only on narrowing value conversions, e.g from a BigInteger to
* an Integer.
*/
@Nullable
public static <T> T convert(Object value, Class<?> to)
throws TypeMismatchException, OverflowException {
final Object result;
if (value == null || value.getClass() == to) {
result = value;
} else {
final Class<?> from = value.getClass();
try {
if (from == Integer.class) { // Integer -> ...
if (to == Long.class) {
result = new Long(((Number) value).longValue());
} else if (to == BigInteger.class) {
result = BigInteger.valueOf(((Number) value).intValue());
} else if (to == Float.class) {
result = new Float(((Number) value).floatValue());
} else if (to == Double.class) {
result = new Double(((Number) value).doubleValue());
} else if (to == BigDecimal.class) {
// Use intValue() to avoid precision errors
result = new BigDecimal(((Number) value).intValue());
} else {
throw new TypeMismatchException(value.getClass(), to);
}
} else if (from == Long.class) { // Long -> ...
if (to == Integer.class) {
final long l = ((Long) value).longValue();
if (l < Integer.MIN_VALUE || l > Integer.MAX_VALUE) {
throw new OverflowException((Number) value, to);
}
result = new Integer((int) l);
} else if (to == BigInteger.class) {
result = BigInteger.valueOf(((Number) value).longValue());
} else if (to == Float.class) {
result = new Float(((Number) value).floatValue());
} else if (to == Double.class) {
result = new Double(((Number) value).doubleValue());
} else if (to == BigDecimal.class) {
// Use longValue() to avoid precision errors
result = new BigDecimal(((Number) value).longValue());
} else {
throw new TypeMismatchException(value.getClass(), to);
}
} else if (from == BigInteger.class) { // BigInteger -> ...
final BigInteger bi = (BigInteger) value;
if (to == Integer.class) {
result = new Integer(bi.intValueExact());
} else if (to == Long.class) {
result = new Long(bi.longValueExact());
} else if (to == Float.class) {
final float f1 = bi.floatValue();
if (f1 == Float.NEGATIVE_INFINITY || f1 == Float.POSITIVE_INFINITY) {
throw new OverflowException(bi, to);
}
result = new Float(f1);
} else if (to == Double.class) {
final double d = bi.doubleValue();
if (d == Double.NEGATIVE_INFINITY || d == Double.POSITIVE_INFINITY) {
throw new OverflowException(bi, to);
}
result = new Double(d);
} else if (to == BigDecimal.class) {
result = new BigDecimal(bi);
} else {
throw new TypeMismatchException(value.getClass(), to);
}
} else if (from == Float.class) { // Float -> ...
final float fl = ((Float) value).floatValue();
if (to == Integer.class) {
if (fl < Integer.MIN_VALUE || fl > Integer.MAX_VALUE | fl % 1 > 0) {
throw new OverflowException((Number) value, to);
}
result = new Integer((int) fl);
} else if (to == Long.class) {
if (fl < Long.MIN_VALUE || fl > Long.MAX_VALUE | fl % 1 > 0) {
throw new OverflowException((Number) value, to);
}
result = new Long((long) fl);
} else if (to == BigInteger.class) {
if (fl % 1 > 0) {
throw new OverflowException((Number) value, to);
}
final BigDecimal bd = BigDecimal.valueOf(fl);
result = bd.toBigInteger();
} else if (to == Double.class) {
result = new Double(((Number) value).doubleValue());
} else if (to == BigDecimal.class) {
result = BigDecimal.valueOf(fl);
} else {
throw new TypeMismatchException(value.getClass(), to);
}
} else if (from == Double.class) { // Double -> ...
final double d = ((Double) value).doubleValue();
if (to == Integer.class) {
if (d < Integer.MIN_VALUE || d > Integer.MAX_VALUE || d % 1 > 0) {
throw new OverflowException((Number) value, to);
}
result = new Integer((int) d);
} else if (to == Long.class) { // OK
if (d < Long.MIN_VALUE || d > Long.MAX_VALUE || d % 1 > 0) {
throw new OverflowException((Number) value, to);
}
result = new Long((int) d);
} else if (to == BigInteger.class) { // OK
if (d % 1 > 0) {
throw new OverflowException((Number) value, to);
}
final BigDecimal bd = BigDecimal.valueOf(d);
result = bd.toBigInteger();
} else if (to == Float.class) { // OK
if (d < -Float.MAX_VALUE || d > Float.MAX_VALUE) {
throw new OverflowException((Number) value, to);
}
result = new Float((float) d);
} else if (to == BigDecimal.class) { // OK
result = BigDecimal.valueOf(d);
} else {
throw new TypeMismatchException(value.getClass(), to);
}
} else if (from == BigDecimal.class) { // BigDecimal -> ...
final BigDecimal bd = (BigDecimal) value;
if (to == Integer.class) { // OK
result = new Integer(bd.intValueExact());
} else if (to == Long.class) { // OK
result = new Long(bd.longValueExact());
} else if (to == BigInteger.class) { // OK
// BigDecimal modulus
final BigDecimal remainder = bd.remainder(BigDecimal.ONE);
if (!remainder.equals(BigDecimal.ZERO)) {
throw new OverflowException(bd, to);
}
result = bd.toBigInteger();
} else if (to == Float.class) { // OK
if (bd.compareTo(BigDecimal_MIN_FLOAT) < 0 || bd.compareTo(BigDecimal_MAX_FLOAT) > 0) {
throw new OverflowException(bd, to);
}
result = new Float(bd.floatValue());
} else if (to == Double.class) { // OK
if (bd.compareTo(BigDecimal_MIN_DOUBLE) < 0
|| bd.compareTo(BigDecimal_MAX_DOUBLE) > 0) {
throw new OverflowException(bd, to);
}
result = new Double(bd.doubleValue());
} else {
throw new TypeMismatchException(value.getClass(), to);
}
} else {
throw new UnexpectedException("convert: " + from.getName());
}
} catch (final ArithmeticException e) {
// Thrown by intValueExact() etc.
throw new OverflowException((Number) value, to);
}
}
@SuppressWarnings("unchecked")
final T t = (T) result;
return t;
}