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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.common.unit;
import org.elasticsearch.ElasticsearchParseException;
/**
* Utility class to represent ratio and percentage values between 0 and 100
*/
public class RatioValue {
private final double percent;
public RatioValue(double percent) {
this.percent = percent;
}
public double getAsRatio() {
return this.percent / 100.0;
}
public double getAsPercent() {
return this.percent;
}
@Override
public String toString() {
return this.percent + "%";
}
/**
* Parses the provided string as a {@link RatioValue}, the string can
* either be in percentage format (eg. 73.5%), or a floating-point ratio
* format (eg. 0.735)
*/
public static RatioValue parseRatioValue(String sValue) {
if (sValue.endsWith("%")) {
final String percentAsString = sValue.substring(0, sValue.length() - 1);
try {
final double percent = Double.parseDouble(percentAsString);
if (percent < 0 || percent > 100) {
throw new ElasticsearchParseException("Percentage should be in [0-100], got [{}]", percentAsString);
}
return new RatioValue(Math.abs(percent));
} catch (NumberFormatException e) {
throw new ElasticsearchParseException("Failed to parse [{}] as a double", e, percentAsString);
}
} else {
try {
double ratio = Double.parseDouble(sValue);
if (ratio < 0 || ratio > 1.0) {
throw new ElasticsearchParseException("Ratio should be in [0-1.0], got [{}]", ratio);
}
return new RatioValue(100.0 * Math.abs(ratio));
} catch (NumberFormatException e) {
throw new ElasticsearchParseException("Invalid ratio or percentage [{}]", sValue);
}
}
}
}