| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.lucene.search; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.Term; |
| |
| /** The Weight for IndriAndQuery, used to normalize, score and explain these queries. */ |
| public class IndriAndWeight extends Weight { |
| |
| private final IndriAndQuery query; |
| private final ArrayList<Weight> weights; |
| private final ScoreMode scoreMode; |
| private final float boost; |
| |
| public IndriAndWeight( |
| IndriAndQuery query, IndexSearcher searcher, ScoreMode scoreMode, float boost) |
| throws IOException { |
| super(query); |
| this.query = query; |
| this.boost = boost; |
| this.scoreMode = scoreMode; |
| weights = new ArrayList<>(); |
| for (BooleanClause c : query) { |
| Weight w = searcher.createWeight(c.getQuery(), scoreMode, 1.0f); |
| weights.add(w); |
| } |
| } |
| |
| private Scorer getScorer(LeafReaderContext context) throws IOException { |
| List<Scorer> subScorers = new ArrayList<>(); |
| |
| for (Weight w : weights) { |
| Scorer scorer = w.scorer(context); |
| if (scorer != null) { |
| subScorers.add(scorer); |
| } |
| } |
| |
| if (subScorers.isEmpty()) { |
| return null; |
| } |
| Scorer scorer = subScorers.get(0); |
| if (subScorers.size() > 1) { |
| scorer = new IndriAndScorer(this, subScorers, scoreMode, boost); |
| } |
| return scorer; |
| } |
| |
| @Override |
| public void extractTerms(Set<Term> terms) { |
| for (Weight weight : weights) { |
| weight.extractTerms(terms); |
| } |
| } |
| |
| @Override |
| public Scorer scorer(LeafReaderContext context) throws IOException { |
| return getScorer(context); |
| } |
| |
| @Override |
| public BulkScorer bulkScorer(LeafReaderContext context) throws IOException { |
| Scorer scorer = getScorer(context); |
| if (scorer != null) { |
| BulkScorer bulkScorer = new DefaultBulkScorer(scorer); |
| return bulkScorer; |
| } |
| return null; |
| } |
| |
| @Override |
| public boolean isCacheable(LeafReaderContext ctx) { |
| for (Weight w : weights) { |
| if (w.isCacheable(ctx) == false) return false; |
| } |
| return true; |
| } |
| |
| @Override |
| public Explanation explain(LeafReaderContext context, int doc) throws IOException { |
| List<Explanation> subs = new ArrayList<>(); |
| boolean fail = false; |
| Iterator<BooleanClause> cIter = query.iterator(); |
| for (Iterator<Weight> wIter = weights.iterator(); wIter.hasNext(); ) { |
| Weight w = wIter.next(); |
| BooleanClause c = cIter.next(); |
| Explanation e = w.explain(context, doc); |
| if (e.isMatch()) { |
| subs.add(e); |
| } else if (c.isRequired()) { |
| subs.add( |
| Explanation.noMatch( |
| "no match on required clause (" + c.getQuery().toString() + ")", e)); |
| fail = true; |
| } |
| } |
| if (fail) { |
| return Explanation.noMatch( |
| "Failure to meet condition(s) of required/prohibited clause(s)", subs); |
| } else { |
| Scorer scorer = scorer(context); |
| if (scorer != null) { |
| int advanced = scorer.iterator().advance(doc); |
| assert advanced == doc; |
| return Explanation.match(scorer.score(), "sum of:", subs); |
| } else { |
| return Explanation.noMatch( |
| "Failure to meet condition(s) of required/prohibited clause(s)", subs); |
| } |
| } |
| } |
| } |