| using System.Runtime.CompilerServices; |
| |
| namespace Lucene.Net.Codecs.Lucene42 |
| { |
| /* |
| * 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 PackedInt32s = Lucene.Net.Util.Packed.PackedInt32s; |
| using SegmentReadState = Lucene.Net.Index.SegmentReadState; |
| using SegmentWriteState = Lucene.Net.Index.SegmentWriteState; |
| |
| /// <summary> |
| /// Lucene 4.2 score normalization format. |
| /// <para/> |
| /// NOTE: this uses the same format as <see cref="Lucene42DocValuesFormat"/> |
| /// Numeric DocValues, but with different file extensions, and passing |
| /// <see cref="PackedInt32s.FASTEST"/> for uncompressed encoding: trading off |
| /// space for performance. |
| /// <para/> |
| /// Files: |
| /// <list type="bullet"> |
| /// <item><description><c>.nvd</c>: DocValues data</description></item> |
| /// <item><description><c>.nvm</c>: DocValues metadata</description></item> |
| /// </list> |
| /// </summary> |
| /// <seealso cref="Lucene42DocValuesFormat"/> |
| public class Lucene42NormsFormat : NormsFormat |
| { |
| internal readonly float acceptableOverheadRatio; |
| |
| /// <summary> |
| /// Calls <c>Lucene42DocValuesFormat(PackedInt32s.FASTEST)</c> (<see cref="Lucene42NormsFormat(float)"/>). |
| /// </summary> |
| public Lucene42NormsFormat() |
| : this(PackedInt32s.FASTEST) |
| { |
| // note: we choose FASTEST here (otherwise our norms are half as big but 15% slower than previous lucene) |
| } |
| |
| /// <summary> |
| /// Creates a new <see cref="Lucene42DocValuesFormat"/> with the specified |
| /// <paramref name="acceptableOverheadRatio"/> for <see cref="Index.NumericDocValues"/>. |
| /// <para/> |
| /// @lucene.experimental |
| /// </summary> |
| /// <param name="acceptableOverheadRatio"> Compression parameter for numerics. |
| /// Currently this is only used when the number of unique values is small.</param> |
| public Lucene42NormsFormat(float acceptableOverheadRatio) |
| { |
| this.acceptableOverheadRatio = acceptableOverheadRatio; |
| } |
| |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| public override DocValuesConsumer NormsConsumer(SegmentWriteState state) |
| { |
| return new Lucene42NormsConsumer(state, DATA_CODEC, DATA_EXTENSION, METADATA_CODEC, METADATA_EXTENSION, acceptableOverheadRatio); |
| } |
| |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| public override DocValuesProducer NormsProducer(SegmentReadState state) |
| { |
| return new Lucene42DocValuesProducer(state, DATA_CODEC, DATA_EXTENSION, METADATA_CODEC, METADATA_EXTENSION); |
| } |
| |
| private const string DATA_CODEC = "Lucene41NormsData"; |
| private const string DATA_EXTENSION = "nvd"; |
| private const string METADATA_CODEC = "Lucene41NormsMetadata"; |
| private const string METADATA_EXTENSION = "nvm"; |
| } |
| } |