org.apache.hadoop.util.bloom.RemoveScheme Maven / Gradle / Ivy
/**
*
* Copyright (c) 2005, European Commission project OneLab under contract 034819
* (http://www.one-lab.org)
*
* All rights reserved.
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
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* the documentation and/or other materials provided with the distribution.
* - Neither the name of the University Catholique de Louvain - UCL
* nor the names of its contributors may be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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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
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*/
package org.apache.hadoop.util.bloom;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* Defines the different remove scheme for retouched Bloom filters.
*
* Originally created by
* European Commission One-Lab Project 034819.
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
public interface RemoveScheme {
/**
* Random selection.
*
* The idea is to randomly select a bit to reset.
*/
public final static short RANDOM = 0;
/**
* MinimumFN Selection.
*
* The idea is to select the bit to reset that will generate the minimum
* number of false negative.
*/
public final static short MINIMUM_FN = 1;
/**
* MaximumFP Selection.
*
* The idea is to select the bit to reset that will remove the maximum number
* of false positive.
*/
public final static short MAXIMUM_FP = 2;
/**
* Ratio Selection.
*
* The idea is to select the bit to reset that will, at the same time, remove
* the maximum number of false positve while minimizing the amount of false
* negative generated.
*/
public final static short RATIO = 3;
}