| using System; |
| using System.Runtime.CompilerServices; |
| |
| namespace Lucene.Net.Codecs.Lucene40 |
| { |
| /* |
| * 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 PerFieldPostingsFormat = Lucene.Net.Codecs.PerField.PerFieldPostingsFormat; |
| |
| /// <summary> |
| /// Implements the Lucene 4.0 index format, with configurable per-field postings formats. |
| /// <para/> |
| /// If you want to reuse functionality of this codec in another codec, extend |
| /// <see cref="FilterCodec"/>. |
| /// <para/> |
| /// See <see cref="Lucene.Net.Codecs.Lucene40"/> package documentation for file format details. |
| /// </summary> |
| // NOTE: if we make largish changes in a minor release, easier to just make Lucene42Codec or whatever |
| // if they are backwards compatible or smallish we can probably do the backwards in the postingsreader |
| // (it writes a minor version, etc). |
| [Obsolete("Only for reading old 4.0 segments")] |
| [CodecName("Lucene40")] // LUCENENET specific - using CodecName attribute to ensure the default name passed from subclasses is the same as this class name |
| public class Lucene40Codec : Codec |
| { |
| private readonly StoredFieldsFormat fieldsFormat = new Lucene40StoredFieldsFormat(); |
| private readonly TermVectorsFormat vectorsFormat = new Lucene40TermVectorsFormat(); |
| private readonly FieldInfosFormat fieldInfosFormat = new Lucene40FieldInfosFormat(); |
| private readonly SegmentInfoFormat infosFormat = new Lucene40SegmentInfoFormat(); |
| private readonly LiveDocsFormat liveDocsFormat = new Lucene40LiveDocsFormat(); |
| |
| private readonly PostingsFormat postingsFormat; |
| |
| private class PerFieldPostingsFormatAnonymousClass : PerFieldPostingsFormat |
| { |
| private readonly Lucene40Codec outerInstance; |
| |
| public PerFieldPostingsFormatAnonymousClass(Lucene40Codec outerInstance) |
| { |
| this.outerInstance = outerInstance; |
| } |
| |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| public override PostingsFormat GetPostingsFormatForField(string field) |
| { |
| return outerInstance.GetPostingsFormatForField(field); |
| } |
| } |
| |
| /// <summary> |
| /// Sole constructor. </summary> |
| public Lucene40Codec() |
| : base() |
| { |
| postingsFormat = new PerFieldPostingsFormatAnonymousClass(this); |
| } |
| |
| public override sealed StoredFieldsFormat StoredFieldsFormat => fieldsFormat; |
| |
| public override sealed TermVectorsFormat TermVectorsFormat => vectorsFormat; |
| |
| public override sealed PostingsFormat PostingsFormat => postingsFormat; |
| |
| public override FieldInfosFormat FieldInfosFormat => fieldInfosFormat; |
| |
| public override SegmentInfoFormat SegmentInfoFormat => infosFormat; |
| |
| private readonly DocValuesFormat defaultDVFormat = new Lucene40DocValuesFormat(); |
| |
| public override DocValuesFormat DocValuesFormat => defaultDVFormat; |
| |
| private readonly NormsFormat normsFormat = new Lucene40NormsFormat(); |
| |
| public override NormsFormat NormsFormat => normsFormat; |
| |
| public override sealed LiveDocsFormat LiveDocsFormat => liveDocsFormat; |
| |
| /// <summary> |
| /// Returns the postings format that should be used for writing |
| /// new segments of <paramref name="field"/>. |
| /// <para/> |
| /// The default implementation always returns "Lucene40". |
| /// </summary> |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| public virtual PostingsFormat GetPostingsFormatForField(string field) |
| { |
| // LUCENENET specific - lazy initialize the codec to ensure we get the correct type if overridden. |
| if (defaultFormat == null) |
| { |
| defaultFormat = Codecs.PostingsFormat.ForName("Lucene40"); |
| } |
| return defaultFormat; |
| } |
| |
| // LUCENENET specific - lazy initialize the codec to ensure we get the correct type if overridden. |
| private PostingsFormat defaultFormat; |
| } |
| } |