| package org.apache.lucene.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. |
| */ |
| |
| import java.io.IOException; |
| |
| import org.apache.lucene.codecs.CodecUtil; |
| import org.apache.lucene.codecs.PostingsReaderBase; |
| import org.apache.lucene.codecs.blocktree.BlockTreeTermsReader; |
| import org.apache.lucene.codecs.blocktree.BlockTreeTermsWriter; |
| import org.apache.lucene.index.FieldInfos; |
| import org.apache.lucene.index.SegmentInfo; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.store.IOContext; |
| import org.apache.lucene.store.IndexInput; |
| |
| /** |
| * Reads append-only terms from AppendingTermsWriter. |
| * @lucene.experimental |
| * @deprecated Only for reading old Appending segments |
| */ |
| @Deprecated |
| public class AppendingTermsReader extends BlockTreeTermsReader { |
| |
| final static String APPENDING_TERMS_CODEC_NAME = "APPENDING_TERMS_DICT"; |
| final static 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) throws IOException { |
| super(dir, fieldInfos, info, postingsReader, ioContext, segmentSuffix, indexDivisor); |
| } |
| |
| @Override |
| protected int readHeader(IndexInput input) throws IOException { |
| return CodecUtil.checkHeader(input, APPENDING_TERMS_CODEC_NAME, |
| BlockTreeTermsWriter.VERSION_START, |
| BlockTreeTermsWriter.VERSION_CURRENT); |
| } |
| |
| @Override |
| protected int readIndexHeader(IndexInput input) throws IOException { |
| return CodecUtil.checkHeader(input, APPENDING_TERMS_INDEX_CODEC_NAME, |
| BlockTreeTermsWriter.VERSION_START, |
| BlockTreeTermsWriter.VERSION_CURRENT); |
| } |
| |
| @Override |
| protected void seekDir(IndexInput input, long dirOffset) throws IOException { |
| input.seek(input.length() - Long.SIZE / 8); |
| long offset = input.readLong(); |
| input.seek(offset); |
| } |
| } |