/**
* Checks if the predicates are successful for the specified item.
*
* @param it item to be checked
* @param qc query context
* @return result of check
* @throws QueryException query exception
*/
protected final boolean preds(final Item it, final QueryContext qc) throws QueryException {
if (preds.length == 0) return true;
// set context value and position
final Value cv = qc.value;
try {
if (qc.scoring) {
double s = 0;
for (final Expr p : preds) {
qc.value = it;
final Item i = p.test(qc, info);
if (i == null) return false;
s += i.score();
}
it.score(Scoring.avg(s, preds.length));
} else {
for (final Expr p : preds) {
qc.value = it;
if (p.test(qc, info) == null) return false;
}
}
return true;
} finally {
qc.value = cv;
}
}
@Override
public FTNode item(final QueryContext qc, final InputInfo ii) throws QueryException {
if (pos == 0) pos = ++qc.ftPos;
matches.reset(pos);
final int c = contains(qc);
if (c == 0) matches.size(0);
// scoring: include number of tokens for calculations
return new FTNode(matches, c == 0 ? 0 : Scoring.word(c, qc.ftToken.count()));
}