| namespace Lucene.Net.Search.Payloads |
| { |
| /* |
| * 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> |
| /// Calculate the final score as the average score of all payloads seen. |
| /// <para/> |
| /// Is thread safe and completely reusable. |
| /// </summary> |
| public class AveragePayloadFunction : PayloadFunction |
| { |
| public override float CurrentScore(int docId, string field, int start, int end, int numPayloadsSeen, float currentScore, float currentPayloadScore) |
| { |
| return currentPayloadScore + currentScore; |
| } |
| |
| public override float DocScore(int docId, string field, int numPayloadsSeen, float payloadScore) |
| { |
| return numPayloadsSeen > 0 ? (payloadScore / numPayloadsSeen) : 1; |
| } |
| |
| public override int GetHashCode() |
| { |
| const int prime = 31; |
| int result = 1; |
| result = prime * result + this.GetType().GetHashCode(); |
| return result; |
| } |
| |
| public override bool Equals(object obj) |
| { |
| if (ReferenceEquals(obj, this)) |
| { |
| return true; |
| } |
| if (obj is null) |
| { |
| return false; |
| } |
| if (this.GetType() != obj.GetType()) |
| { |
| return false; |
| } |
| return true; |
| } |
| } |
| } |