| using System.IO; |
| |
| namespace Lucene.Net.Codecs |
| { |
| /* |
| * 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. |
| */ |
| |
| using SegmentReadState = Lucene.Net.Index.SegmentReadState; |
| using SegmentWriteState = Lucene.Net.Index.SegmentWriteState; |
| |
| /// <summary> |
| /// Encodes/decodes per-document score normalization values. |
| /// </summary> |
| public abstract class NormsFormat |
| { |
| /// <summary> |
| /// Sole constructor. (For invocation by subclass |
| /// constructors, typically implicit.) |
| /// </summary> |
| protected internal NormsFormat() |
| { |
| } |
| |
| /// <summary> |
| /// Returns a <see cref="DocValuesConsumer"/> to write norms to the |
| /// index. |
| /// </summary> |
| public abstract DocValuesConsumer NormsConsumer(SegmentWriteState state); |
| |
| /// <summary> |
| /// Returns a <see cref="DocValuesProducer"/> to read norms from the index. |
| /// <para/> |
| /// NOTE: by the time this call returns, it must hold open any files it will |
| /// need to use; else, those files may be deleted. Additionally, required files |
| /// may be deleted during the execution of this call before there is a chance |
| /// to open them. Under these circumstances an <see cref="IOException"/> should be thrown by |
| /// the implementation. <see cref="IOException"/> are expected and will automatically cause |
| /// a retry of the segment opening logic with the newly revised segments. |
| /// </summary> |
| public abstract DocValuesProducer NormsProducer(SegmentReadState state); |
| } |
| } |