/**
* Merges two matches.
*
* @param i1 first item
* @param i2 second item
*/
private static void and(final FTNode i1, final FTNode i2) {
final FTMatches all = new FTMatches((byte) Math.max(i1.matches().pos, i2.matches().pos));
for (final FTMatch s1 : i1.matches()) {
for (final FTMatch s2 : i2.matches()) {
all.add(new FTMatch(s1.size() + s2.size()).add(s1).add(s2));
}
}
i1.score(Scoring.avg(i1.score() + i2.score(), 2));
i1.matches(all);
}
@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()));
}
/**
* Adds a match.
*
* @param s start position
* @param e end position
*/
void add(final int s, final int e) {
if (!first && (mode == FTMode.ALL || mode == FTMode.ALL_WORDS)) matches.and(s, e);
else matches.or(s, e);
}