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