@Override
public void setScorer(Scorer scorer) {
// System.out.println("C.setScorer scorer=" + scorer);
// Since we invoke .score(), and the comparators likely
// do as well, cache it so it's only "really" computed
// once:
this.scorer = new ScoreCachingWrappingScorer(scorer);
for (int compIDX = 0; compIDX < comparators.length; compIDX++) {
comparators[compIDX].setScorer(this.scorer);
}
Arrays.fill(joinScorers, null);
Queue<Scorer> queue = new LinkedList<>();
// System.out.println("\nqueue: add top scorer=" + scorer);
queue.add(scorer);
while ((scorer = queue.poll()) != null) {
// System.out.println(" poll: " + scorer + "; " + scorer.getWeight().getQuery());
if (scorer instanceof ToParentBlockJoinQuery.BlockJoinScorer) {
enroll(
(ToParentBlockJoinQuery) scorer.getWeight().getQuery(),
(ToParentBlockJoinQuery.BlockJoinScorer) scorer);
}
for (ChildScorer sub : scorer.getChildren()) {
// System.out.println(" add sub: " + sub.child + "; " + sub.child.getWeight().getQuery());
queue.add(sub.child);
}
}
}
/**
* Get a list of all Spans made available from the passed-in Scorer
*
* @param scorer the scorer to extract spans from
* @param errorOnNoSpans if true, throw an error if no Spans can be extracted from the Scorer or
* any of its children
* @return a List of Spans
*/
public static List<Spans> getSpans(Scorer scorer, boolean errorOnNoSpans) {
List<Spans> spans = new ArrayList<>();
if (scorer instanceof Spans) {
spans.add((Spans) scorer);
return spans;
}
Collection<Scorer.ChildScorer> children = scorer.getChildren();
if (errorOnNoSpans && children.size() == 0)
throw new RuntimeException(
"Couldn't extract SpanScorer from " + scorer.getClass().getCanonicalName());
for (Scorer.ChildScorer child : children) {
spans.addAll(getSpans(child.child, errorOnNoSpans));
}
return spans;
}