| /* |
| * 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.solr.search; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.QueryVisitor; |
| import org.apache.lucene.search.Rescorer; |
| import org.apache.lucene.search.ScoreMode; |
| import org.apache.lucene.search.TopDocsCollector; |
| import org.apache.lucene.search.Weight; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.solr.handler.component.MergeStrategy; |
| import org.apache.solr.handler.component.QueryElevationComponent; |
| import org.apache.solr.request.SolrRequestInfo; |
| |
| public abstract class AbstractReRankQuery extends RankQuery { |
| protected Query mainQuery; |
| final protected int reRankDocs; |
| final protected Rescorer reRankQueryRescorer; |
| protected Set<BytesRef> boostedPriority; |
| |
| public AbstractReRankQuery(Query mainQuery, int reRankDocs, Rescorer reRankQueryRescorer) { |
| this.mainQuery = mainQuery; |
| this.reRankDocs = reRankDocs; |
| this.reRankQueryRescorer = reRankQueryRescorer; |
| } |
| |
| public RankQuery wrap(Query _mainQuery) { |
| if(_mainQuery != null){ |
| this.mainQuery = _mainQuery; |
| } |
| return this; |
| } |
| |
| public MergeStrategy getMergeStrategy() { |
| return null; |
| } |
| |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| public TopDocsCollector getTopDocsCollector(int len, QueryCommand cmd, IndexSearcher searcher) throws IOException { |
| if(this.boostedPriority == null) { |
| SolrRequestInfo info = SolrRequestInfo.getRequestInfo(); |
| if(info != null) { |
| Map context = info.getReq().getContext(); |
| this.boostedPriority = (Set<BytesRef>)context.get(QueryElevationComponent.BOOSTED); |
| } |
| } |
| |
| return new ReRankCollector(reRankDocs, len, reRankQueryRescorer, cmd, searcher, boostedPriority); |
| } |
| |
| public Query rewrite(IndexReader reader) throws IOException { |
| Query q = mainQuery.rewrite(reader); |
| if (q != mainQuery) { |
| return rewrite(q); |
| } |
| return super.rewrite(reader); |
| } |
| |
| protected abstract Query rewrite(Query rewrittenMainQuery) throws IOException; |
| |
| @Override |
| public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException{ |
| final Weight mainWeight = mainQuery.createWeight(searcher, scoreMode, boost); |
| return new ReRankWeight(mainQuery, reRankQueryRescorer, searcher, mainWeight); |
| } |
| |
| @Override |
| public void visit(QueryVisitor visitor) { |
| visitor.visitLeaf(this); |
| } |
| } |