com.stratio.cassandra.lucene.service.NoIDFSimilarity Maven / Gradle / Ivy
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* Licensed to STRATIO (C) under one or more contributor license agreements.
* See the NOTICE file distributed with this work for additional information
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* 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
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package com.stratio.cassandra.lucene.service;
import org.apache.lucene.search.similarities.DefaultSimilarity;
/**
* {@link DefaultSimilarity} that ignores the inverse document frequency, doing the similarity independent of the index
* context.
*
* @author Andres de la Pena {@literal }
*/
class NoIDFSimilarity extends DefaultSimilarity {
/**
* Returns always an constant neutral value of {@code 1.0}.
*/
@Override
public float idf(long docFreq, long numDocs) {
return 1.0f;
}
}