| using System.Collections.Generic; |
| |
| namespace Lucene.Net.Search.Highlight |
| { |
| /* |
| * 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> |
| /// Lightweight class to hold term, weight, and positions used for scoring this term. |
| /// </summary> |
| public class WeightedSpanTerm : WeightedTerm |
| { |
| private bool _positionSensitive; |
| private readonly List<PositionSpan> _positionSpans = new List<PositionSpan>(); |
| |
| public WeightedSpanTerm(float weight, string term) |
| : base(weight, term) |
| { |
| // LUCENENET NOTE: Duplicate instantiation |
| //_positionSpans = new List<PositionSpan>(); |
| } |
| |
| public WeightedSpanTerm(float weight, string term, bool positionSensitive) |
| : base(weight, term) |
| { |
| _positionSensitive = positionSensitive; |
| } |
| |
| /// <summary> |
| /// Checks to see if this term is valid at <paramref name="position"/>. |
| /// </summary> |
| /// <param name="position">to check against valid term postions</param> |
| /// <returns>true iff this term is a hit at this position</returns> |
| public virtual bool CheckPosition(int position) |
| { |
| // There would probably be a slight speed improvement if PositionSpans |
| // where kept in some sort of priority queue - that way this method |
| // could |
| // bail early without checking each PositionSpan. |
| |
| foreach (var positionSpan in _positionSpans) |
| { |
| if ((position >= positionSpan.Start) && (position <= positionSpan.End)) |
| { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| public virtual void AddPositionSpans(IList<PositionSpan> positionSpans) |
| { |
| this._positionSpans.AddRange(positionSpans); |
| } |
| |
| public virtual bool IsPositionSensitive |
| { |
| get => _positionSensitive; |
| set => this._positionSensitive = value; |
| } |
| |
| public virtual IList<PositionSpan> PositionSpans => _positionSpans; |
| } |
| } |