| /* |
| * 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.facet.taxonomy; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.lucene.facet.FacetsConfig; |
| import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter; |
| import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter.OrdinalMap; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.DirectoryReader; |
| import org.apache.lucene.index.IndexWriter; |
| import org.apache.lucene.index.CodecReader; |
| import org.apache.lucene.index.SlowCodecReaderWrapper; |
| import org.apache.lucene.store.Directory; |
| |
| /** |
| * Utility methods for merging index and taxonomy directories. |
| * @lucene.experimental |
| */ |
| public abstract class TaxonomyMergeUtils { |
| |
| private TaxonomyMergeUtils() {} |
| |
| /** |
| * Merges the given taxonomy and index directories and commits the changes to |
| * the given writers. |
| */ |
| public static void merge(Directory srcIndexDir, Directory srcTaxoDir, OrdinalMap map, IndexWriter destIndexWriter, |
| DirectoryTaxonomyWriter destTaxoWriter, FacetsConfig srcConfig) throws IOException { |
| |
| // merge the taxonomies |
| destTaxoWriter.addTaxonomy(srcTaxoDir, map); |
| int ordinalMap[] = map.getMap(); |
| DirectoryReader reader = DirectoryReader.open(srcIndexDir); |
| try { |
| List<LeafReaderContext> leaves = reader.leaves(); |
| int numReaders = leaves.size(); |
| CodecReader wrappedLeaves[] = new CodecReader[numReaders]; |
| for (int i = 0; i < numReaders; i++) { |
| wrappedLeaves[i] = SlowCodecReaderWrapper.wrap(new OrdinalMappingLeafReader(leaves.get(i).reader(), ordinalMap, srcConfig)); |
| } |
| destIndexWriter.addIndexes(wrappedLeaves); |
| |
| // commit changes to taxonomy and index respectively. |
| destTaxoWriter.commit(); |
| destIndexWriter.commit(); |
| } finally { |
| reader.close(); |
| } |
| } |
| |
| } |