| /* |
| * 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.codecs.lucene60; |
| |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.lucene.codecs.CodecUtil; |
| import org.apache.lucene.codecs.PointsReader; |
| import org.apache.lucene.index.FieldInfo; |
| import org.apache.lucene.index.IndexFileNames; |
| import org.apache.lucene.index.PointValues; |
| import org.apache.lucene.index.SegmentReadState; |
| import org.apache.lucene.store.ChecksumIndexInput; |
| import org.apache.lucene.store.IndexInput; |
| import org.apache.lucene.util.IOUtils; |
| import org.apache.lucene.util.bkd.BKDReader; |
| |
| /** Reads point values previously written with Lucene60PointsWriter */ |
| public class Lucene60PointsReader extends PointsReader implements Closeable { |
| final IndexInput dataIn; |
| final SegmentReadState readState; |
| final Map<Integer,BKDReader> readers = new HashMap<>(); |
| |
| /** Sole constructor */ |
| public Lucene60PointsReader(SegmentReadState readState) throws IOException { |
| this.readState = readState; |
| |
| |
| String indexFileName = IndexFileNames.segmentFileName(readState.segmentInfo.name, |
| readState.segmentSuffix, |
| Lucene60PointsFormat.INDEX_EXTENSION); |
| |
| Map<Integer,Long> fieldToFileOffset = new HashMap<>(); |
| |
| // Read index file |
| try (ChecksumIndexInput indexIn = readState.directory.openChecksumInput(indexFileName, readState.context)) { |
| Throwable priorE = null; |
| try { |
| CodecUtil.checkIndexHeader(indexIn, |
| Lucene60PointsFormat.META_CODEC_NAME, |
| Lucene60PointsFormat.INDEX_VERSION_START, |
| Lucene60PointsFormat.INDEX_VERSION_CURRENT, |
| readState.segmentInfo.getId(), |
| readState.segmentSuffix); |
| int count = indexIn.readVInt(); |
| for(int i=0;i<count;i++) { |
| int fieldNumber = indexIn.readVInt(); |
| long fp = indexIn.readVLong(); |
| fieldToFileOffset.put(fieldNumber, fp); |
| } |
| } catch (Throwable t) { |
| priorE = t; |
| } finally { |
| CodecUtil.checkFooter(indexIn, priorE); |
| } |
| } |
| |
| String dataFileName = IndexFileNames.segmentFileName(readState.segmentInfo.name, |
| readState.segmentSuffix, |
| Lucene60PointsFormat.DATA_EXTENSION); |
| boolean success = false; |
| dataIn = readState.directory.openInput(dataFileName, readState.context); |
| try { |
| |
| CodecUtil.checkIndexHeader(dataIn, |
| Lucene60PointsFormat.DATA_CODEC_NAME, |
| Lucene60PointsFormat.DATA_VERSION_START, |
| Lucene60PointsFormat.DATA_VERSION_START, |
| readState.segmentInfo.getId(), |
| readState.segmentSuffix); |
| |
| // NOTE: data file is too costly to verify checksum against all the bytes on open, |
| // but for now we at least verify proper structure of the checksum footer: which looks |
| // for FOOTER_MAGIC + algorithmID. This is cheap and can detect some forms of corruption |
| // such as file truncation. |
| CodecUtil.retrieveChecksum(dataIn); |
| |
| for(Map.Entry<Integer,Long> ent : fieldToFileOffset.entrySet()) { |
| int fieldNumber = ent.getKey(); |
| long fp = ent.getValue(); |
| dataIn.seek(fp); |
| BKDReader reader = new BKDReader(dataIn, dataIn, dataIn); |
| readers.put(fieldNumber, reader); |
| } |
| |
| success = true; |
| } finally { |
| if (success == false) { |
| IOUtils.closeWhileHandlingException(this); |
| } |
| } |
| } |
| |
| /** Returns the underlying {@link BKDReader}. |
| * |
| * @lucene.internal */ |
| @Override |
| public PointValues getValues(String fieldName) { |
| FieldInfo fieldInfo = readState.fieldInfos.fieldInfo(fieldName); |
| if (fieldInfo == null) { |
| throw new IllegalArgumentException("field=\"" + fieldName + "\" is unrecognized"); |
| } |
| if (fieldInfo.getPointDimensionCount() == 0) { |
| throw new IllegalArgumentException("field=\"" + fieldName + "\" did not index point values"); |
| } |
| |
| return readers.get(fieldInfo.number); |
| } |
| |
| @Override |
| public long ramBytesUsed() { |
| return 0L; |
| } |
| |
| @Override |
| public void checkIntegrity() throws IOException { |
| CodecUtil.checksumEntireFile(dataIn); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| dataIn.close(); |
| // Free up heap: |
| readers.clear(); |
| } |
| |
| } |
| |