Size.java

/*
 * Copyright (C) 2014  James Lawrence.
 *
 *     This file is part of GrimEdi.
 *
 *     GrimEdi is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU 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 General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.sqrt4.grimedi.util;

public class Size implements Comparable<Size> {
    private final static String[] prefixes = {"B", "KB", "MB", "GB"};
    private long size;

    public Size(long size) {
        this.size = size;
    }

    public String toString() {
        if(size == 0)
            return "0B";
        int idx = Math.min(((int) Math.log10(size)) / 3, prefixes.length);
        double divisor = Math.pow(1024, idx);
        return String.format("%2.2f%s", (size/divisor), prefixes[idx]);
    }

    public int compareTo(Size o) {
        return Long.compare(size, o.size);
    }
}