| package org.apache.lucene.index.codecs.preflex; |
| |
| /** |
| * 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.util.Set; |
| import java.io.IOException; |
| |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.index.codecs.Codec; |
| import org.apache.lucene.index.PerDocWriteState; |
| import org.apache.lucene.index.SegmentInfo; |
| import org.apache.lucene.index.SegmentWriteState; |
| import org.apache.lucene.index.SegmentReadState; |
| import org.apache.lucene.index.codecs.FieldsConsumer; |
| import org.apache.lucene.index.codecs.FieldsProducer; |
| import org.apache.lucene.index.codecs.PerDocConsumer; |
| import org.apache.lucene.index.codecs.PerDocValues; |
| |
| /** Codec that reads the pre-flex-indexing postings |
| * format. It does not provide a writer because newly |
| * written segments should use StandardCodec. |
| * |
| * @deprecated (4.0) This is only used to read indexes created |
| * before 4.0. |
| * @lucene.experimental |
| */ |
| @Deprecated |
| public class PreFlexCodec extends Codec { |
| |
| /** Extension of terms file */ |
| public static final String TERMS_EXTENSION = "tis"; |
| |
| /** Extension of terms index file */ |
| public static final String TERMS_INDEX_EXTENSION = "tii"; |
| |
| /** Extension of freq postings file */ |
| public static final String FREQ_EXTENSION = "frq"; |
| |
| /** Extension of prox postings file */ |
| public static final String PROX_EXTENSION = "prx"; |
| |
| public PreFlexCodec() { |
| name = "PreFlex"; |
| } |
| |
| @Override |
| public FieldsConsumer fieldsConsumer(SegmentWriteState state) throws IOException { |
| throw new IllegalArgumentException("this codec can only be used for reading"); |
| } |
| |
| @Override |
| public FieldsProducer fieldsProducer(SegmentReadState state) throws IOException { |
| return new PreFlexFields(state.dir, state.fieldInfos, state.segmentInfo, state.readBufferSize, state.termsIndexDivisor); |
| } |
| |
| @Override |
| public void files(Directory dir, SegmentInfo info, int id, Set<String> files) throws IOException { |
| // preflex fields have no codec ID - we ignore it here |
| PreFlexFields.files(dir, info, files); |
| } |
| |
| @Override |
| public void getExtensions(Set<String> extensions) { |
| extensions.add(FREQ_EXTENSION); |
| extensions.add(PROX_EXTENSION); |
| extensions.add(TERMS_EXTENSION); |
| extensions.add(TERMS_INDEX_EXTENSION); |
| } |
| |
| @Override |
| public PerDocConsumer docsConsumer(PerDocWriteState state) throws IOException { |
| throw new UnsupportedOperationException("PerDocConsumer is not supported by Preflex codec"); |
| } |
| |
| @Override |
| public PerDocValues docsProducer(SegmentReadState state) throws IOException { |
| throw new UnsupportedOperationException("PerDocValues is not supported by Preflex codec"); |
| } |
| } |