| using J2N.Text; |
| using Lucene.Net.Diagnostics; |
| using Lucene.Net.Util; |
| using System; |
| using System.Collections.Generic; |
| using System.Diagnostics; |
| using BytesRef = Lucene.Net.Util.BytesRef; |
| using FieldInfos = Lucene.Net.Index.FieldInfos; |
| |
| 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 IndexInput = Lucene.Net.Store.IndexInput; |
| using Term = Lucene.Net.Index.Term; |
| |
| /// <summary> |
| /// @lucene.experimental |
| /// </summary> |
| [Obsolete("(4.0)")] |
| internal sealed class TermBuffer |
| #if FEATURE_CLONEABLE |
| : System.ICloneable |
| #endif |
| { |
| private string field; |
| private Term term; // cached |
| |
| private BytesRef bytes = new BytesRef(10); |
| |
| // Cannot be -1 since (strangely) we write that |
| // fieldNumber into index for first indexed term: |
| private int currentFieldNumber = -2; |
| |
| private static readonly IComparer<BytesRef> utf8AsUTF16Comparer = BytesRef.UTF8SortedAsUTF16Comparer; |
| |
| internal int newSuffixStart; // only valid right after .read is called |
| |
| public int CompareTo(TermBuffer other) |
| { |
| if (field == other.field) // fields are interned |
| // (only by PreFlex codec) |
| { |
| return utf8AsUTF16Comparer.Compare(bytes, other.bytes); |
| } |
| else |
| { |
| return field.CompareToOrdinal(other.field); |
| } |
| } |
| |
| public void Read(IndexInput input, FieldInfos fieldInfos) |
| { |
| this.term = null; // invalidate cache |
| newSuffixStart = input.ReadVInt32(); |
| int length = input.ReadVInt32(); |
| int totalLength = newSuffixStart + length; |
| if (Debugging.AssertsEnabled) Debugging.Assert(totalLength <= ByteBlockPool.BYTE_BLOCK_SIZE - 2,"termLength={0},resource={1}", totalLength, input); |
| if (bytes.Bytes.Length < totalLength) |
| { |
| bytes.Grow(totalLength); |
| } |
| bytes.Length = totalLength; |
| input.ReadBytes(bytes.Bytes, newSuffixStart, length); |
| int fieldNumber = input.ReadVInt32(); |
| if (fieldNumber != currentFieldNumber) |
| { |
| currentFieldNumber = fieldNumber; |
| // NOTE: too much sneakiness here, seriously this is a negative vint?! |
| if (currentFieldNumber == -1) |
| { |
| field = ""; |
| } |
| else |
| { |
| if (Debugging.AssertsEnabled) Debugging.Assert(fieldInfos.FieldInfo(currentFieldNumber) != null, "{0}", currentFieldNumber); |
| |
| field = fieldInfos.FieldInfo(currentFieldNumber).Name.Intern(); |
| } |
| } |
| else |
| { |
| if (Debugging.AssertsEnabled) Debugging.Assert(field.Equals(fieldInfos.FieldInfo(fieldNumber).Name, StringComparison.Ordinal), "currentFieldNumber={0} field={1} vs {2}", currentFieldNumber, field, fieldInfos.FieldInfo(fieldNumber)?.Name ?? "null"); |
| } |
| } |
| |
| public void Set(Term term) |
| { |
| if (term == null) |
| { |
| Reset(); |
| return; |
| } |
| bytes.CopyBytes(term.Bytes); |
| field = term.Field.Intern(); |
| |
| currentFieldNumber = -1; |
| this.term = term; |
| } |
| |
| public void Set(TermBuffer other) |
| { |
| field = other.field; |
| currentFieldNumber = other.currentFieldNumber; |
| // dangerous to copy Term over, since the underlying |
| // BytesRef could subsequently be modified: |
| term = null; |
| bytes.CopyBytes(other.bytes); |
| } |
| |
| public void Reset() |
| { |
| field = null; |
| term = null; |
| currentFieldNumber = -1; |
| } |
| |
| public Term ToTerm() |
| { |
| if (field == null) // unset |
| { |
| return null; |
| } |
| |
| return term ?? (term = new Term(field, BytesRef.DeepCopyOf(bytes))); |
| } |
| |
| public object Clone() |
| { |
| TermBuffer clone = null; |
| try |
| { |
| clone = (TermBuffer)base.MemberwiseClone(); |
| } |
| #pragma warning disable 168 |
| catch (InvalidOperationException e) |
| #pragma warning restore 168 |
| { |
| } |
| clone.bytes = BytesRef.DeepCopyOf(bytes); |
| return clone; |
| } |
| } |
| } |