1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements.  See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License.  You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 using System;
19 
20 namespace Lucene.Net.Search.Payloads
21 {
22 
23 
24 	/// <summary> Returns the maximum payload score seen, else 1 if there are no payloads on the doc.
25 	/// <p/>
26 	/// Is thread safe and completely reusable.
27 	///
28 	///
29 	/// </summary>
30 	[Serializable]
31 	public class MaxPayloadFunction:PayloadFunction
32 	{
CurrentScore(int docId, System.String field, int start, int end, int numPayloadsSeen, float currentScore, float currentPayloadScore)33 		public override float CurrentScore(int docId, System.String field, int start, int end, int numPayloadsSeen, float currentScore, float currentPayloadScore)
34 		{
35             if (numPayloadsSeen == 0)
36             {
37                 return currentPayloadScore;
38             }
39             else
40             {
41                 return System.Math.Max(currentPayloadScore, currentScore);
42             }
43 		}
44 
DocScore(int docId, System.String field, int numPayloadsSeen, float payloadScore)45 		public override float DocScore(int docId, System.String field, int numPayloadsSeen, float payloadScore)
46 		{
47 			return numPayloadsSeen > 0?payloadScore:1;
48 		}
49 
GetHashCode()50 		public override int GetHashCode()
51 		{
52 			int prime = 31;
53 			int result = 1;
54 			result = prime * result + this.GetType().GetHashCode();
55 			return result;
56 		}
57 
Equals(System.Object obj)58 		public  override bool Equals(System.Object obj)
59 		{
60 			if (this == obj)
61 				return true;
62 			if (obj == null)
63 				return false;
64 			if (GetType() != obj.GetType())
65 				return false;
66 			return true;
67 		}
68 	}
69 }