| package org.apache.lucene.codecs.lucene42; |
| |
| /* |
| * 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.Collections; |
| import java.util.Map; |
| |
| import org.apache.lucene.codecs.CodecUtil; |
| import org.apache.lucene.codecs.FieldInfosReader; |
| import org.apache.lucene.index.CorruptIndexException; |
| import org.apache.lucene.index.FieldInfo; |
| import org.apache.lucene.index.FieldInfos; |
| import org.apache.lucene.index.IndexFileNames; |
| import org.apache.lucene.index.FieldInfo.DocValuesType; |
| import org.apache.lucene.index.FieldInfo.IndexOptions; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.store.IOContext; |
| import org.apache.lucene.store.IndexInput; |
| import org.apache.lucene.util.IOUtils; |
| |
| /** |
| * Lucene 4.2 FieldInfos reader. |
| * |
| * @lucene.experimental |
| * @deprecated Only for reading old 4.2-4.5 segments |
| * @see Lucene42FieldInfosFormat |
| */ |
| @Deprecated |
| final class Lucene42FieldInfosReader extends FieldInfosReader { |
| |
| /** Sole constructor. */ |
| public Lucene42FieldInfosReader() { |
| } |
| |
| @Override |
| public FieldInfos read(Directory directory, String segmentName, String segmentSuffix, IOContext iocontext) throws IOException { |
| final String fileName = IndexFileNames.segmentFileName(segmentName, "", Lucene42FieldInfosFormat.EXTENSION); |
| IndexInput input = directory.openInput(fileName, iocontext); |
| |
| boolean success = false; |
| try { |
| CodecUtil.checkHeader(input, Lucene42FieldInfosFormat.CODEC_NAME, |
| Lucene42FieldInfosFormat.FORMAT_START, |
| Lucene42FieldInfosFormat.FORMAT_CURRENT); |
| |
| final int size = input.readVInt(); //read in the size |
| FieldInfo infos[] = new FieldInfo[size]; |
| |
| for (int i = 0; i < size; i++) { |
| String name = input.readString(); |
| final int fieldNumber = input.readVInt(); |
| byte bits = input.readByte(); |
| boolean isIndexed = (bits & Lucene42FieldInfosFormat.IS_INDEXED) != 0; |
| boolean storeTermVector = (bits & Lucene42FieldInfosFormat.STORE_TERMVECTOR) != 0; |
| boolean omitNorms = (bits & Lucene42FieldInfosFormat.OMIT_NORMS) != 0; |
| boolean storePayloads = (bits & Lucene42FieldInfosFormat.STORE_PAYLOADS) != 0; |
| final IndexOptions indexOptions; |
| if (!isIndexed) { |
| indexOptions = null; |
| } else if ((bits & Lucene42FieldInfosFormat.OMIT_TERM_FREQ_AND_POSITIONS) != 0) { |
| indexOptions = IndexOptions.DOCS_ONLY; |
| } else if ((bits & Lucene42FieldInfosFormat.OMIT_POSITIONS) != 0) { |
| indexOptions = IndexOptions.DOCS_AND_FREQS; |
| } else if ((bits & Lucene42FieldInfosFormat.STORE_OFFSETS_IN_POSTINGS) != 0) { |
| indexOptions = IndexOptions.DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS; |
| } else { |
| indexOptions = IndexOptions.DOCS_AND_FREQS_AND_POSITIONS; |
| } |
| |
| // DV Types are packed in one byte |
| byte val = input.readByte(); |
| final DocValuesType docValuesType = getDocValuesType(input, (byte) (val & 0x0F)); |
| final DocValuesType normsType = getDocValuesType(input, (byte) ((val >>> 4) & 0x0F)); |
| final Map<String,String> attributes = input.readStringStringMap(); |
| infos[i] = new FieldInfo(name, isIndexed, fieldNumber, storeTermVector, |
| omitNorms, storePayloads, indexOptions, docValuesType, normsType, -1, Collections.unmodifiableMap(attributes)); |
| } |
| |
| CodecUtil.checkEOF(input); |
| FieldInfos fieldInfos = new FieldInfos(infos); |
| success = true; |
| return fieldInfos; |
| } finally { |
| if (success) { |
| input.close(); |
| } else { |
| IOUtils.closeWhileHandlingException(input); |
| } |
| } |
| } |
| |
| private static DocValuesType getDocValuesType(IndexInput input, byte b) throws IOException { |
| if (b == 0) { |
| return null; |
| } else if (b == 1) { |
| return DocValuesType.NUMERIC; |
| } else if (b == 2) { |
| return DocValuesType.BINARY; |
| } else if (b == 3) { |
| return DocValuesType.SORTED; |
| } else if (b == 4) { |
| return DocValuesType.SORTED_SET; |
| } else { |
| throw new CorruptIndexException("invalid docvalues byte: " + b + " (resource=" + input + ")"); |
| } |
| } |
| } |