@Override
public Item item(final QueryContext qc, final InputInfo ii) throws QueryException {
final byte[] s;
if (exprs.length == 0) {
final Item it = ctxValue(qc).item(qc, info);
if (it instanceof FItem) throw FISTRING_X.get(ii, it.type);
s = it == null ? Token.EMPTY : it.string(ii);
} else {
s = toEmptyToken(arg(0, qc), qc);
}
return Int.get(Token.length(s));
}
/**
* Returns a database function for the first node in a node set.
*
* @param n node set
* @param i offset
* @return function string
*/
static String openPre(final Nodes n, final int i) {
return Function._DB_OPEN_PRE.get(Str.get(n.data.meta.name), Int.get(n.pres[i])).toString();
}
@Override
public Item item(final QueryContext qc, final InputInfo ii) throws QueryException {
ctxValue(qc);
return Int.get(qc.focus.pos);
}