| /* |
| * 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.query; |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.lucene.search.BoostQuery; |
| import org.apache.lucene.search.ConstantScoreQuery; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.MatchNoDocsQuery; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.QueryVisitor; |
| import org.apache.lucene.search.ScoreMode; |
| import org.apache.lucene.search.Weight; |
| import org.apache.solr.search.DocSet; |
| import org.apache.solr.search.ExtendedQueryBase; |
| import org.apache.solr.search.SolrConstantScoreQuery; |
| import org.apache.solr.search.SolrIndexSearcher; |
| |
| public class FilterQuery extends ExtendedQueryBase { |
| protected final Query q; |
| |
| public FilterQuery(Query q) { |
| if (q == null) { |
| this.q = new MatchNoDocsQuery(); |
| return; |
| } |
| this.q = q; |
| } |
| |
| public Query getQuery() { |
| return q; |
| } |
| |
| @Override |
| public int hashCode() { |
| return q.hashCode() + 0xc0e65615; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof FilterQuery)) return false; |
| FilterQuery fq = (FilterQuery)obj; |
| return this.q.equals(fq.q); |
| } |
| |
| @Override |
| public String toString(String field) { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("filter("); |
| sb.append(q.toString("")); |
| sb.append(')'); |
| return sb.toString(); |
| } |
| |
| @Override |
| public void visit(QueryVisitor visitor) { |
| q.visit(visitor); |
| } |
| |
| @Override |
| public Query rewrite(IndexReader reader) throws IOException { |
| Query newQ = q.rewrite(reader); |
| if (newQ != q) { |
| return new FilterQuery(newQ); |
| } else { |
| return this; |
| } |
| } |
| |
| @Override |
| public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException { |
| // SolrRequestInfo reqInfo = SolrRequestInfo.getRequestInfo(); |
| |
| if (!(searcher instanceof SolrIndexSearcher)) { |
| // delete-by-query won't have SolrIndexSearcher |
| return new BoostQuery(new ConstantScoreQuery(q), 0).createWeight(searcher, scoreMode, 1f); |
| } |
| |
| SolrIndexSearcher solrSearcher = (SolrIndexSearcher)searcher; |
| DocSet docs = solrSearcher.getDocSet(q); |
| // reqInfo.addCloseHook(docs); // needed for off-heap refcounting |
| |
| return new BoostQuery(new SolrConstantScoreQuery(docs.getTopFilter()), 0).createWeight(searcher, scoreMode, 1f); |
| } |
| } |