@Override
public Explanation explain(LeafReaderContext context, int doc) throws IOException {
final Scorer s = scorer(context);
final boolean exists;
if (s == null) {
exists = false;
} else {
final TwoPhaseIterator twoPhase = s.twoPhaseIterator();
if (twoPhase == null) {
exists = s.iterator().advance(doc) == doc;
} else {
exists = twoPhase.approximation().advance(doc) == doc && twoPhase.matches();
}
}
if (exists) {
return Explanation.match(
queryWeight,
getQuery().toString() + ", product of:",
Explanation.match(boost, "boost"),
Explanation.match(queryNorm, "queryNorm"));
} else {
return Explanation.noMatch(getQuery().toString() + " doesn't match id " + doc);
}
}
/** Explain the score we computed for doc */
@Override
public Explanation explain(LeafReaderContext context, int doc) throws IOException {
boolean match = false;
float max = 0.0f, sum = 0.0f;
List<Explanation> subs = new ArrayList<>();
for (Weight wt : weights) {
Explanation e = wt.explain(context, doc);
if (e.isMatch()) {
match = true;
subs.add(e);
sum += e.getValue();
max = Math.max(max, e.getValue());
}
}
if (match) {
final float score = max + (sum - max) * tieBreakerMultiplier;
final String desc =
tieBreakerMultiplier == 0.0f
? "max of:"
: "max plus " + tieBreakerMultiplier + " times others of:";
return Explanation.match(score, desc, subs);
} else {
return Explanation.noMatch("No matching clause");
}
}
