| /* |
| * 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.List; |
| |
| /** |
| * Combines scores of subscorers. If a subscorer does not contain the docId, a smoothing score is |
| * calculated for that document/subscorer combination. |
| */ |
| public class IndriAndScorer extends IndriDisjunctionScorer { |
| |
| protected IndriAndScorer(Weight weight, List<Scorer> subScorers, ScoreMode scoreMode, float boost) |
| throws IOException { |
| super(weight, subScorers, scoreMode, boost); |
| } |
| |
| @Override |
| public float score(List<Scorer> subScorers) throws IOException { |
| int docId = this.docID(); |
| return scoreDoc(subScorers, docId); |
| } |
| |
| @Override |
| public float smoothingScore(List<Scorer> subScorers, int docId) throws IOException { |
| return scoreDoc(subScorers, docId); |
| } |
| |
| private float scoreDoc(List<Scorer> subScorers, int docId) throws IOException { |
| double score = 0; |
| double boostSum = 0.0; |
| for (Scorer scorer : subScorers) { |
| if (scorer instanceof IndriScorer) { |
| IndriScorer indriScorer = (IndriScorer) scorer; |
| int scorerDocId = indriScorer.docID(); |
| // If the query exists in the document, score the document |
| // Otherwise, compute a smoothing score, which acts like an idf |
| // for subqueries/terms |
| double tempScore = 0; |
| if (docId == scorerDocId) { |
| tempScore = indriScorer.score(); |
| } else { |
| tempScore = indriScorer.smoothingScore(docId); |
| } |
| tempScore *= indriScorer.getBoost(); |
| score += tempScore; |
| boostSum += indriScorer.getBoost(); |
| } |
| } |
| if (boostSum == 0) { |
| return 0; |
| } else { |
| return (float) (score / boostSum); |
| } |
| } |
| } |