| using Lucene.Net.Util; |
| using System; |
| using Console = Lucene.Net.Support.SystemConsole; |
| |
| namespace Lucene.Net.Codecs.Lucene3x |
| { |
| using LuceneTestCase = Lucene.Net.Util.LuceneTestCase; |
| using SegmentReadState = Lucene.Net.Index.SegmentReadState; |
| |
| /* |
| * 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 SegmentWriteState = Lucene.Net.Index.SegmentWriteState; |
| |
| /// <summary> |
| /// Codec, only for testing, that can write and read the |
| /// pre-flex index format. |
| /// <para/> |
| /// @lucene.experimental |
| /// </summary> |
| #pragma warning disable 612, 618 |
| internal class PreFlexRWPostingsFormat : Lucene3xPostingsFormat |
| { |
| public PreFlexRWPostingsFormat() |
| { |
| // NOTE: we impersonate the PreFlex codec so that it can |
| // read the segments we write! |
| } |
| |
| public override FieldsConsumer FieldsConsumer(SegmentWriteState state) |
| { |
| return new PreFlexRWFieldsWriter(state); |
| } |
| |
| public override FieldsProducer FieldsProducer(SegmentReadState state) |
| { |
| // Whenever IW opens readers, eg for merging, we have to |
| // keep terms order in UTF16: |
| |
| return new Lucene3xFieldsAnonymousInnerClassHelper(this, state.Directory, state.FieldInfos, state.SegmentInfo, state.Context, state.TermsIndexDivisor); |
| } |
| |
| private class Lucene3xFieldsAnonymousInnerClassHelper : Lucene3xFields |
| { |
| private readonly PreFlexRWPostingsFormat outerInstance; |
| |
| public Lucene3xFieldsAnonymousInnerClassHelper(PreFlexRWPostingsFormat outerInstance, Store.Directory directory, Index.FieldInfos fieldInfos, Index.SegmentInfo segmentInfo, Store.IOContext context, int termsIndexDivisor) |
| : base(directory, fieldInfos, segmentInfo, context, termsIndexDivisor) |
| { |
| this.outerInstance = outerInstance; |
| } |
| |
| protected override bool SortTermsByUnicode |
| { |
| get |
| { |
| // We carefully peek into stack track above us: if |
| // we are part of a "merge", we must sort by UTF16: |
| bool unicodeSortOrder = true; |
| |
| // LUCENENET specific: for these to work in release mode, we have added [MethodImpl(MethodImplOptions.NoInlining)] |
| // to each possible target of the StackTraceHelper. If these change, so must the attribute on the target methods. |
| if (StackTraceHelper.DoesStackTraceContainMethod("Merge")) |
| { |
| unicodeSortOrder = false; |
| if (LuceneTestCase.VERBOSE) |
| { |
| Console.WriteLine("NOTE: PreFlexRW codec: forcing legacy UTF16 term sort order"); |
| } |
| } |
| |
| return unicodeSortOrder; |
| } |
| } |
| } |
| } |
| #pragma warning restore 612, 618 |
| } |