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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.node.admin.task.util.file;
import java.util.Locale;
import java.util.Objects;
/**
* @author freva
*/
public class DiskSize implements Comparable<DiskSize> {
public static final DiskSize ZERO = DiskSize.of(0);
private static final char[] UNITS = "kMGTPE".toCharArray();
public enum Unit {
kB(1_000), kiB(1 << 10),
MB(1_000_000), MiB(1 << 20),
GB(1_000_000_000), GiB(1 << 30),
TB(1_000_000_000_000L), TiB(1L << 40),
PB(1_000_000_000_000_000L), PiB(1L << 50);
private final long size;
Unit(long size) { this.size = size; }
}
private final long bytes;
private DiskSize(long bytes) { this.bytes = bytes; }
public long bytes() { return bytes; }
public long as(Unit unit) { return bytes / unit.size; }
public double asDouble(Unit unit) { return (double) bytes / unit.size; }
public DiskSize add(DiskSize other) { return new DiskSize(bytes + other.bytes); }
public static DiskSize of(long bytes) { return new DiskSize(bytes); }
public static DiskSize of(double bytes, Unit unit) { return new DiskSize((long) (bytes * unit.size)); }
public static DiskSize of(long bytes, Unit unit) { return new DiskSize(bytes * unit.size); }
public String asString() { return asString(0); }
public String asString(int decimals) {
if (bytes < 1000) return bytes + " bytes";
int unit = -1;
double remaining = bytes;
for (; remaining >= 1000; unit++) remaining /= 1000;
return String.format(Locale.ENGLISH, "%." + decimals + "f %sB", remaining, UNITS[unit]);
}
@Override
public int compareTo(DiskSize rhs) {
return Long.compare(this.bytes, rhs.bytes);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
DiskSize size = (DiskSize) o;
return bytes == size.bytes;
}
@Override
public int hashCode() {
return Objects.hash(bytes);
}
@Override
public String toString() {
return asString();
}
}
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