package org.apache.lucene.search.payloads;
import org.apache.lucene.search.Explanation;
/**
* 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.
*/
/**
* Calculates the minimum payload seen
*
**/
public class MinPayloadFunction extends PayloadFunction {
@Override
public float currentScore(int docId, String field, int start, int end, int numPayloadsSeen, float currentScore, float currentPayloadScore) {
if (numPayloadsSeen == 0) {
return currentPayloadScore;
} else {
return Math.min(currentPayloadScore, currentScore);
}
}
@Override
public float docScore(int docId, String field, int numPayloadsSeen, float payloadScore) {
return numPayloadsSeen > 0 ? payloadScore : 1;
}
@Override
public Explanation explain(int doc, int numPayloadsSeen, float payloadScore) {
Explanation expl = new Explanation();
float minPayloadScore = (numPayloadsSeen > 0 ? payloadScore : 1);
expl.setValue(minPayloadScore);
expl.setDescription("MinPayloadFunction(...)");
return expl;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + this.getClass().hashCode();
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
return true;
}
}