| using Lucene.Net.Index; |
| using Lucene.Net.Store; |
| using System.Collections.Generic; |
| |
| namespace Lucene.Net.Codecs.Lucene3x |
| { |
| /* |
| * 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> |
| /// @lucene.internal |
| /// @lucene.experimental |
| /// </summary> |
| internal class PreFlexRWFieldInfosReader : FieldInfosReader |
| { |
| internal const int FORMAT_MINIMUM = PreFlexRWFieldInfosWriter.FORMAT_START; |
| |
| public override FieldInfos Read(Directory directory, string segmentName, string segmentSuffix, IOContext iocontext) |
| { |
| string fileName = IndexFileNames.SegmentFileName(segmentName, "", PreFlexRWFieldInfosWriter.FIELD_INFOS_EXTENSION); |
| IndexInput input = directory.OpenInput(fileName, iocontext); |
| |
| try |
| { |
| int format = input.ReadVInt32(); |
| |
| if (format > FORMAT_MINIMUM) |
| { |
| throw new IndexFormatTooOldException(input, format, FORMAT_MINIMUM, PreFlexRWFieldInfosWriter.FORMAT_CURRENT); |
| } |
| if (format < PreFlexRWFieldInfosWriter.FORMAT_CURRENT && format != PreFlexRWFieldInfosWriter.FORMAT_PREFLEX_RW) |
| { |
| throw new IndexFormatTooNewException(input, format, FORMAT_MINIMUM, PreFlexRWFieldInfosWriter.FORMAT_CURRENT); |
| } |
| |
| int size = input.ReadVInt32(); //read in the size |
| FieldInfo[] infos = new FieldInfo[size]; |
| |
| for (int i = 0; i < size; i++) |
| { |
| string name = input.ReadString(); |
| int fieldNumber = format == PreFlexRWFieldInfosWriter.FORMAT_PREFLEX_RW ? input.ReadInt32() : i; |
| byte bits = input.ReadByte(); |
| bool isIndexed = (bits & PreFlexRWFieldInfosWriter.IS_INDEXED) != 0; |
| bool storeTermVector = (bits & PreFlexRWFieldInfosWriter.STORE_TERMVECTOR) != 0; |
| bool omitNorms = (bits & PreFlexRWFieldInfosWriter.OMIT_NORMS) != 0; |
| bool storePayloads = (bits & PreFlexRWFieldInfosWriter.STORE_PAYLOADS) != 0; |
| IndexOptions indexOptions; |
| if (!isIndexed) |
| { |
| indexOptions = IndexOptions.NONE; |
| } |
| else if ((bits & PreFlexRWFieldInfosWriter.OMIT_TERM_FREQ_AND_POSITIONS) != 0) |
| { |
| indexOptions = IndexOptions.DOCS_ONLY; |
| } |
| else if ((bits & PreFlexRWFieldInfosWriter.OMIT_POSITIONS) != 0) |
| { |
| if (format <= PreFlexRWFieldInfosWriter.FORMAT_OMIT_POSITIONS) |
| { |
| indexOptions = IndexOptions.DOCS_AND_FREQS; |
| } |
| else |
| { |
| throw new CorruptIndexException("Corrupt fieldinfos, OMIT_POSITIONS set but format=" + format + " (resource: " + input + ")"); |
| } |
| } |
| else |
| { |
| indexOptions = IndexOptions.DOCS_AND_FREQS_AND_POSITIONS; |
| } |
| |
| // LUCENE-3027: past indices were able to write |
| // storePayloads=true when omitTFAP is also true, |
| // which is invalid. We correct that, here: |
| if (indexOptions != IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) |
| { |
| storePayloads = false; |
| } |
| |
| DocValuesType normType = isIndexed && !omitNorms ? DocValuesType.NUMERIC : DocValuesType.NONE; |
| if (format == PreFlexRWFieldInfosWriter.FORMAT_PREFLEX_RW && normType != DocValuesType.NONE) |
| { |
| // RW can have norms but doesn't write them |
| normType = input.ReadByte() != 0 ? DocValuesType.NUMERIC : DocValuesType.NONE; |
| } |
| |
| infos[i] = new FieldInfo(name, |
| isIndexed, |
| fieldNumber, |
| storeTermVector, |
| omitNorms, |
| storePayloads, |
| indexOptions, |
| DocValuesType.NONE, |
| normType, |
| null); |
| } |
| |
| if (input.GetFilePointer() != input.Length) |
| { |
| throw new CorruptIndexException("did not read all bytes from file \"" + fileName + "\": read " + input.GetFilePointer() + " vs size " + input.Length + " (resource: " + input + ")"); |
| } |
| return new FieldInfos(infos); |
| } |
| finally |
| { |
| input.Dispose(); |
| } |
| } |
| |
| //public static void Files(Directory dir, SegmentInfo info, ISet<string> files) // LUCENENET: Not used |
| //{ |
| // files.Add(IndexFileNames.SegmentFileName(info.Name, "", PreFlexRWFieldInfosWriter.FIELD_INFOS_EXTENSION)); |
| //} |
| } |
| } |