| using Lucene.Net.Diagnostics; |
| using System; |
| using System.Diagnostics; |
| using System.Runtime.CompilerServices; |
| using IBits = Lucene.Net.Util.IBits; |
| |
| 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. |
| */ |
| |
| using FieldInfo = Lucene.Net.Index.FieldInfo; |
| using FieldInfos = Lucene.Net.Index.FieldInfos; |
| using IndexInput = Lucene.Net.Store.IndexInput; |
| using IndexOptions = Lucene.Net.Index.IndexOptions; |
| using Term = Lucene.Net.Index.Term; |
| |
| /// <summary> |
| /// @lucene.experimental |
| /// </summary> |
| [Obsolete("(4.0)")] |
| internal class SegmentTermDocs |
| { |
| //protected SegmentReader parent; |
| private readonly FieldInfos fieldInfos; |
| |
| private readonly TermInfosReader tis; |
| protected IBits m_liveDocs; |
| protected IndexInput m_freqStream; |
| protected int m_count; |
| protected internal int m_df; |
| internal int doc = 0; |
| internal int freq; |
| |
| private readonly int skipInterval; // LUCENENET: marked readonly |
| private readonly int maxSkipLevels; // LUCENENET: marked readonly |
| private Lucene3xSkipListReader skipListReader; |
| |
| private long freqBasePointer; |
| private long proxBasePointer; |
| |
| private long skipPointer; |
| private bool haveSkipped; |
| |
| protected bool m_currentFieldStoresPayloads; |
| protected IndexOptions m_indexOptions; |
| |
| public SegmentTermDocs(IndexInput freqStream, TermInfosReader tis, FieldInfos fieldInfos) |
| { |
| this.m_freqStream = (IndexInput)freqStream.Clone(); |
| this.tis = tis; |
| this.fieldInfos = fieldInfos; |
| skipInterval = tis.SkipInterval; |
| maxSkipLevels = tis.MaxSkipLevels; |
| } |
| |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| public virtual void Seek(Term term) |
| { |
| TermInfo ti = tis.Get(term); |
| Seek(ti, term); |
| } |
| |
| public virtual IBits LiveDocs |
| { |
| get => this.m_liveDocs; // LUCENENET specific - per MSDN, a property must always have a getter |
| set => this.m_liveDocs = value; |
| } |
| |
| public virtual void Seek(SegmentTermEnum segmentTermEnum) |
| { |
| TermInfo ti; |
| Term term; |
| |
| // use comparison of fieldinfos to verify that termEnum belongs to the same segment as this SegmentTermDocs |
| if (segmentTermEnum.fieldInfos == fieldInfos) // optimized case |
| { |
| term = segmentTermEnum.Term(); |
| ti = segmentTermEnum.TermInfo(); |
| } // punt case |
| else |
| { |
| term = segmentTermEnum.Term(); |
| ti = tis.Get(term); |
| } |
| |
| Seek(ti, term); |
| } |
| |
| internal virtual void Seek(TermInfo ti, Term term) |
| { |
| m_count = 0; |
| FieldInfo fi = fieldInfos.FieldInfo(term.Field); |
| this.m_indexOptions = (fi != null) ? fi.IndexOptions : IndexOptions.DOCS_AND_FREQS_AND_POSITIONS; |
| m_currentFieldStoresPayloads = (fi != null) && fi.HasPayloads; |
| if (ti == null) |
| { |
| m_df = 0; |
| } |
| else |
| { |
| m_df = ti.DocFreq; |
| doc = 0; |
| freqBasePointer = ti.FreqPointer; |
| proxBasePointer = ti.ProxPointer; |
| skipPointer = freqBasePointer + ti.SkipOffset; |
| m_freqStream.Seek(freqBasePointer); |
| haveSkipped = false; |
| } |
| } |
| |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| public void Dispose() |
| { |
| Dispose(true); |
| GC.SuppressFinalize(this); |
| } |
| |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| protected virtual void Dispose(bool disposing) |
| { |
| if (disposing) |
| { |
| m_freqStream.Dispose(); |
| if (skipListReader != null) |
| { |
| skipListReader.Dispose(); |
| } |
| } |
| } |
| |
| public int Doc => doc; |
| |
| public int Freq => freq; |
| |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| protected internal virtual void SkippingDoc() |
| { |
| } |
| |
| public virtual bool Next() |
| { |
| while (true) |
| { |
| if (m_count == m_df) |
| { |
| return false; |
| } |
| int docCode = m_freqStream.ReadVInt32(); |
| |
| if (m_indexOptions == IndexOptions.DOCS_ONLY) |
| { |
| doc += docCode; |
| } |
| else |
| { |
| doc += (int)((uint)docCode >> 1); // shift off low bit |
| if ((docCode & 1) != 0) // if low bit is set |
| { |
| freq = 1; // freq is one |
| } |
| else |
| { |
| freq = m_freqStream.ReadVInt32(); // else read freq |
| if (Debugging.AssertsEnabled) Debugging.Assert(freq != 1); |
| } |
| } |
| |
| m_count++; |
| |
| if (m_liveDocs == null || m_liveDocs.Get(doc)) |
| { |
| break; |
| } |
| SkippingDoc(); |
| } |
| return true; |
| } |
| |
| /// <summary> |
| /// Optimized implementation. </summary> |
| public virtual int Read(int[] docs, int[] freqs) |
| { |
| int length = docs.Length; |
| if (m_indexOptions == IndexOptions.DOCS_ONLY) |
| { |
| return ReadNoTf(docs, freqs, length); |
| } |
| else |
| { |
| int i = 0; |
| while (i < length && m_count < m_df) |
| { |
| // manually inlined call to next() for speed |
| int docCode = m_freqStream.ReadVInt32(); |
| doc += (int)((uint)docCode >> 1); // shift off low bit |
| if ((docCode & 1) != 0) // if low bit is set |
| { |
| freq = 1; // freq is one |
| } |
| else |
| { |
| freq = m_freqStream.ReadVInt32(); // else read freq |
| } |
| m_count++; |
| |
| if (m_liveDocs == null || m_liveDocs.Get(doc)) |
| { |
| docs[i] = doc; |
| freqs[i] = freq; |
| ++i; |
| } |
| } |
| return i; |
| } |
| } |
| |
| private int ReadNoTf(int[] docs, int[] freqs, int length) |
| { |
| int i = 0; |
| while (i < length && m_count < m_df) |
| { |
| // manually inlined call to next() for speed |
| doc += m_freqStream.ReadVInt32(); |
| m_count++; |
| |
| if (m_liveDocs == null || m_liveDocs.Get(doc)) |
| { |
| docs[i] = doc; |
| // Hardware freq to 1 when term freqs were not |
| // stored in the index |
| freqs[i] = 1; |
| ++i; |
| } |
| } |
| return i; |
| } |
| |
| /// <summary> |
| /// Overridden by <see cref="SegmentTermPositions"/> to skip in prox stream. </summary> |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| protected internal virtual void SkipProx(long proxPointer, int payloadLength) |
| { |
| } |
| |
| /// <summary> |
| /// Optimized implementation. </summary> |
| public virtual bool SkipTo(int target) |
| { |
| // don't skip if the target is close (within skipInterval docs away) |
| if ((target - skipInterval) >= doc && m_df >= skipInterval) // optimized case |
| { |
| if (skipListReader == null) |
| { |
| skipListReader = new Lucene3xSkipListReader((IndexInput)m_freqStream.Clone(), maxSkipLevels, skipInterval); // lazily clone |
| } |
| |
| if (!haveSkipped) // lazily initialize skip stream |
| { |
| skipListReader.Init(skipPointer, freqBasePointer, proxBasePointer, m_df, m_currentFieldStoresPayloads); |
| haveSkipped = true; |
| } |
| |
| int newCount = skipListReader.SkipTo(target); |
| if (newCount > m_count) |
| { |
| m_freqStream.Seek(skipListReader.FreqPointer); |
| SkipProx(skipListReader.ProxPointer, skipListReader.PayloadLength); |
| |
| doc = skipListReader.Doc; |
| m_count = newCount; |
| } |
| } |
| |
| // done skipping, now just scan |
| do |
| { |
| if (!Next()) |
| { |
| return false; |
| } |
| } while (target > doc); |
| return true; |
| } |
| } |
| } |