| using Lucene.Net.Util; |
| using System.Collections.Generic; |
| using WeightedFragInfo = Lucene.Net.Search.VectorHighlight.FieldFragList.WeightedFragInfo; |
| |
| namespace Lucene.Net.Search.VectorHighlight |
| { |
| /* |
| * 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> |
| /// An implementation of FragmentsBuilder that outputs score-order fragments. |
| /// </summary> |
| public class ScoreOrderFragmentsBuilder : BaseFragmentsBuilder |
| { |
| /// <summary> |
| /// a constructor. |
| /// </summary> |
| public ScoreOrderFragmentsBuilder() |
| : base() |
| { |
| } |
| |
| /// <summary> |
| /// a constructor. |
| /// </summary> |
| /// <param name="preTags">array of pre-tags for markup terms.</param> |
| /// <param name="postTags">array of post-tags for markup terms.</param> |
| public ScoreOrderFragmentsBuilder(string[] preTags, string[] postTags) |
| : base(preTags, postTags) |
| { |
| } |
| |
| public ScoreOrderFragmentsBuilder(IBoundaryScanner bs) |
| : base(bs) |
| { |
| } |
| |
| public ScoreOrderFragmentsBuilder(string[] preTags, string[] postTags, IBoundaryScanner bs) |
| : base(preTags, postTags, bs) |
| { |
| } |
| |
| /// <summary> |
| /// Sort by score the list of <see cref="WeightedFragInfo"/> |
| /// </summary> |
| public override IList<WeightedFragInfo> GetWeightedFragInfoList(IList<WeightedFragInfo> src) |
| { |
| CollectionUtil.TimSort(src, new ScoreComparer()); |
| return src; |
| } |
| |
| /// <summary> |
| /// <see cref="IComparer{T}"/> for <see cref="WeightedFragInfo"/> by boost, breaking ties |
| /// by offset. |
| /// </summary> |
| public class ScoreComparer : IComparer<WeightedFragInfo> |
| { |
| public virtual int Compare(WeightedFragInfo o1, WeightedFragInfo o2) |
| { |
| if (o1.TotalBoost > o2.TotalBoost) return -1; |
| else if (o1.TotalBoost < o2.TotalBoost) return 1; |
| // if same score then check startOffset |
| else |
| { |
| if (o1.StartOffset < o2.StartOffset) return -1; |
| else if (o1.StartOffset > o2.StartOffset) return 1; |
| } |
| return 0; |
| } |
| } |
| } |
| } |