| using Lucene.Net.Index; |
| using Lucene.Net.Store; |
| using System; |
| |
| namespace Lucene.Net.Codecs.Appending |
| { |
| /* |
| * 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. |
| */ |
| |
| /// <summary> |
| /// Reads append-only terms from AppendingTermsWriter. |
| /// <para/> |
| /// @lucene.experimental |
| /// </summary> |
| [Obsolete("Only for reading old Appending segments")] |
| public class AppendingTermsReader : BlockTreeTermsReader |
| { |
| private const string APPENDING_TERMS_CODEC_NAME = "APPENDING_TERMS_DICT"; |
| private const string APPENDING_TERMS_INDEX_CODEC_NAME = "APPENDING_TERMS_INDEX"; |
| |
| public AppendingTermsReader(Directory dir, FieldInfos fieldInfos, SegmentInfo info, |
| PostingsReaderBase postingsReader, |
| IOContext ioContext, string segmentSuffix, int indexDivisor) |
| : base(dir, fieldInfos, info, postingsReader, ioContext, segmentSuffix, indexDivisor) |
| { |
| } |
| |
| protected override int ReadHeader(IndexInput input) |
| { |
| return CodecUtil.CheckHeader(input, APPENDING_TERMS_CODEC_NAME, |
| BlockTreeTermsWriter.VERSION_START, |
| BlockTreeTermsWriter.VERSION_CURRENT); |
| } |
| |
| protected override int ReadIndexHeader(IndexInput input) |
| { |
| return CodecUtil.CheckHeader(input, APPENDING_TERMS_INDEX_CODEC_NAME, |
| BlockTreeTermsWriter.VERSION_START, |
| BlockTreeTermsWriter.VERSION_CURRENT); |
| } |
| |
| protected override void SeekDir(IndexInput input, long dirOffset) |
| { |
| input.Seek(input.Length - sizeof(long)/8); |
| long offset = input.ReadInt64(); |
| input.Seek(offset); |
| } |
| } |
| } |