/*
* ARX: Powerful Data Anonymization
* Copyright 2012 - 2017 Fabian Prasser, Florian Kohlmayer and contributors
*
* Licensed 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.
*/
package org.deidentifier.arx.criteria;
import org.deidentifier.arx.certificate.elements.ElementData;
import org.deidentifier.arx.framework.check.groupify.HashGroupifyDistribution;
/**
* This criterion ensures that the sample uniqueness falls below a given threshold.
*
* @author Fabian Prasser
*/
public class SampleUniqueness extends RiskBasedCriterion{
/** SVUID*/
private static final long serialVersionUID = -4528395062333281525L;
/**
* Creates a new instance of this criterion.
*
* @param riskThreshold
*/
public SampleUniqueness(double riskThreshold){
super(true, true, riskThreshold);
}
@Override
public SampleUniqueness clone() {
return new SampleUniqueness(this.getRiskThreshold());
}
/**
* Return marketer risk threshold, 1 if there is none
* @return
*/
public double getRiskThresholdMarketer() {
// TODO: Risk is estimated differently than in the other models, here
return getRiskThreshold();
}
@Override
public boolean isLocalRecodingSupported() {
return false;
}
@Override
public ElementData render() {
ElementData result = new ElementData("Sample uniqueness");
result.addProperty("Threshold", super.getRiskThreshold());
return result;
}
@Override
public String toString() {
return "("+getRiskThreshold()+")-sample-uniqueness";
}
@Override
protected boolean isFulfilled(HashGroupifyDistribution distribution) {
return distribution.getFractionOfRecordsInClassesOfSize(1) <= getRiskThreshold();
}
}