/**
* Returns the item with weight calculation.
*
* @param item input item
* @param ctx query context
* @return item
* @throws QueryException query exception
*/
FTNode weight(final FTNode item, final QueryContext ctx) throws QueryException {
// evaluate weight
if (item == null) return null;
final double d = checkDbl(weight, ctx);
if (Math.abs(d) > 1000) FTWEIGHT.thrw(input, d);
if (d == 0) item.all.size = 0;
item.score(item.score() * d);
return item;
}
@Override
public Item ev(final InputInfo ii, final Item a, final Item b) throws QueryException {
final Type ta = a.type, tb = b.type;
if (ta == tb) {
if (ta == YMD) {
final BigDecimal bd = BigDecimal.valueOf(((YMd) b).ymd());
if (bd.equals(BigDecimal.ZERO)) DATEZERO.thrw(ii, info());
return Dec.get(
BigDecimal.valueOf(((YMd) a).ymd()).divide(bd, 20, BigDecimal.ROUND_HALF_EVEN));
}
if (ta == DTD) {
final BigDecimal bd = ((DTd) b).dtd();
if (bd.equals(BigDecimal.ZERO)) DATEZERO.thrw(ii, info());
return Dec.get(((DTd) a).dtd().divide(bd, 20, BigDecimal.ROUND_HALF_EVEN));
}
}
if (ta == YMD) {
if (!tb.isNumber()) errNum(ii, b);
return new YMd((Dur) a, b.dbl(ii), false, ii);
}
if (ta == DTD) {
if (!tb.isNumber()) errNum(ii, b);
return new DTd((Dur) a, b.dbl(ii), false, ii);
}
checkNum(ii, a, b);
final Type t = type(ta, tb);
if (t == DBL) return Dbl.get(a.dbl(ii) / b.dbl(ii));
if (t == FLT) return Flt.get(a.flt(ii) / b.flt(ii));
final BigDecimal b1 = a.dec(ii);
final BigDecimal b2 = b.dec(ii);
if (b2.signum() == 0) DIVZERO.thrw(ii, a);
final int s = Math.max(18, Math.max(b1.scale(), b2.scale()));
return Dec.get(b1.divide(b2, s, BigDecimal.ROUND_HALF_EVEN));
}