| package org.apache.lucene.search.grouping.term; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| |
| import org.apache.lucene.index.AtomicReaderContext; |
| import org.apache.lucene.index.DocValues; |
| import org.apache.lucene.index.SortedDocValues; |
| import org.apache.lucene.search.LeafCollector; |
| import org.apache.lucene.search.Sort; |
| import org.apache.lucene.search.grouping.AbstractSecondPassGroupingCollector; |
| import org.apache.lucene.search.grouping.SearchGroup; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.util.SentinelIntSet; |
| |
| /** |
| * Concrete implementation of {@link org.apache.lucene.search.grouping.AbstractSecondPassGroupingCollector} that groups based on |
| * field values and more specifically uses {@link org.apache.lucene.index.SortedDocValues} |
| * to collect grouped docs. |
| * |
| * @lucene.experimental |
| */ |
| public class TermSecondPassGroupingCollector extends AbstractSecondPassGroupingCollector<BytesRef> { |
| |
| private final SentinelIntSet ordSet; |
| private SortedDocValues index; |
| private final String groupField; |
| |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| public TermSecondPassGroupingCollector(String groupField, Collection<SearchGroup<BytesRef>> groups, Sort groupSort, Sort withinGroupSort, |
| int maxDocsPerGroup, boolean getScores, boolean getMaxScores, boolean fillSortFields) |
| throws IOException { |
| super(groups, groupSort, withinGroupSort, maxDocsPerGroup, getScores, getMaxScores, fillSortFields); |
| ordSet = new SentinelIntSet(groupMap.size(), -2); |
| this.groupField = groupField; |
| groupDocs = (SearchGroupDocs<BytesRef>[]) new SearchGroupDocs[ordSet.keys.length]; |
| } |
| |
| @Override |
| protected void doSetNextReader(AtomicReaderContext readerContext) throws IOException { |
| super.doSetNextReader(readerContext); |
| index = DocValues.getSorted(readerContext.reader(), groupField); |
| |
| // Rebuild ordSet |
| ordSet.clear(); |
| for (SearchGroupDocs<BytesRef> group : groupMap.values()) { |
| // System.out.println(" group=" + (group.groupValue == null ? "null" : group.groupValue.utf8ToString())); |
| int ord = group.groupValue == null ? -1 : index.lookupTerm(group.groupValue); |
| if (group.groupValue == null || ord >= 0) { |
| groupDocs[ordSet.put(ord)] = group; |
| } |
| } |
| } |
| |
| @Override |
| protected SearchGroupDocs<BytesRef> retrieveGroup(int doc) throws IOException { |
| int slot = ordSet.find(index.getOrd(doc)); |
| if (slot >= 0) { |
| return groupDocs[slot]; |
| } |
| return null; |
| } |
| } |