@Override
public Item item(final QueryContext qc, final InputInfo ii) throws QueryException {
final Iter ir = iter(qc);
final Item it = ir.next();
if (it == null || ir.size() == 1) return it;
final Item n = ir.next();
if (n != null) {
final ValueBuilder vb = new ValueBuilder().add(it).add(n);
if (ir.next() != null) vb.add(Str.get(DOTS));
throw SEQFOUND_X.get(info, vb.value());
}
return it;
}
@Override
public Iter iter(final QueryContext qc) throws QueryException {
final Iter ir = exprs[0].iter(qc);
final long len = ir.size();
if (len == 0) throw ONEORMORE.get(info);
if (len > 0) return ir;
return new Iter() {
private boolean first = true;
@Override
public Item next() throws QueryException {
final Item it = ir.next();
if (first) {
if (it == null) throw ONEORMORE.get(info);
first = false;
}
return it;
}
};
}