ByteTool.java

package de.cinovo.cloudconductor.server.repo;

import java.math.BigDecimal;
import java.math.RoundingMode;

/**
 * Copyright 2014 Hoegernet<br>
 * <br>
 *
 * @author Thorsten Hoeger
 *
 */
public class ByteTool {
	
	/**
	 * @param bytes the bytes
	 * @return the formated string
	 */
	public String format(long bytes) {
		BigDecimal byteCount = new BigDecimal(bytes).setScale(3, RoundingMode.HALF_UP);
		int thousandStep = 0;
		
		while (byteCount.longValue() > 1024) {
			byteCount = byteCount.divide(new BigDecimal("1024"), 3, RoundingMode.HALF_UP);
			thousandStep++;
		}
		
		return byteCount.toPlainString() + " " + this.getUnit(thousandStep);
	}

	private String getUnit(int thousandStep) {
		switch (thousandStep) {
		case 0:
			return "B";
		case 1:
			return "KB";
		case 2:
			return "MB";
		case 3:
			return "GB";
		case 4:
			return "TB";
		case 5:
			return "PB";
		default:
			return "10^" + (thousandStep * 3) + " B";
		}
	}
}