org.graylog2.shared.utilities.StringUtils Maven / Gradle / Ivy
/*
* Copyright (C) 2020 Graylog, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* .
*/
package org.graylog2.shared.utilities;
import java.util.Locale;
public final class StringUtils {
private StringUtils() {
}
public static String f(String format, Object... args) {
return String.format(Locale.ENGLISH, format, args);
}
public static String humanReadableByteCount(final long bytes)
{
final String[] units = { "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB" };
final int base = 1024;
// When using the smallest unit no decimal point is needed, because it's the exact number.
if (bytes < base) {
return bytes + " " + units[0];
}
final int exponent = (int) (Math.log(bytes) / Math.log(base));
final String unit = units[exponent];
return StringUtils.f("%.1f %s", bytes / Math.pow(base, exponent), unit);
}
}