@Override public Explanation explain(final AtomicReaderContext context, final int doc) throws IOException { final NodeScorer cs = (NodeScorer) this.scorer(context, true, false, context.reader().getLiveDocs()); final boolean exists = (cs != null && cs.skipToCandidate(doc) && cs.doc() == doc && cs.nextNode()); final ComplexExplanation result = new ComplexExplanation(); if (exists) { result.setDescription(NodeConstantScoreQuery.this.toString() + ", product of:"); result.setValue(queryWeight); result.setMatch(Boolean.TRUE); result.addDetail(new Explanation(NodeConstantScoreQuery.this.getBoost(), "boost")); result.addDetail(new Explanation(queryNorm, "queryNorm")); } else { result.setDescription(NodeConstantScoreQuery.this.toString() + " doesn't match id " + doc); result.setValue(0); result.setMatch(Boolean.FALSE); } return result; } }