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/*
* SonarQube
* Copyright (C) 2009-2017 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.api.utils;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Locale;
/**
* Utility to parse various inputs
*
* @since 1.10
*/
public final class ParsingUtils {
private ParsingUtils() {
}
/**
* Parses a string with a locale and returns the corresponding number
*
* @throws ParseException if number cannot be parsed
*/
public static double parseNumber(String number, Locale locale) throws ParseException {
if ("".equals(number)) {
return Double.NaN;
}
return NumberFormat.getNumberInstance(locale).parse(number).doubleValue();
}
/**
* Parses a string with the default locale and returns the corresponding number
*
* @throws ParseException if number cannot be parsed
*/
public static double parseNumber(String number) throws ParseException {
return parseNumber(number, Locale.ENGLISH);
}
/**
* Scales a double value, taking into account 2 decimals
*/
public static double scaleValue(double value) {
return scaleValue(value, 2);
}
/**
* Scales a double value with decimals
*/
public static double scaleValue(double value, int decimals) {
BigDecimal bd = BigDecimal.valueOf(value);
return bd.setScale(decimals, RoundingMode.HALF_UP).doubleValue();
}
}
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