com.saperion.util

Class FileSizeCalcer

java.lang.Object

com.saperion.util.FileSizeCalcer

public final class FileSizeCalcer
extends Object

This class can be statically used to calculate file sizes by given bytes. The devision factors 1000 (KILO_FACTOR) and 1024 (KIBI_FACTOR) are supported.

Author:

sts

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FileSizeCalcer.CalcFactor This enumeration defines the devision factors used by the FileSizeCalcer.
static class	FileSizeCalcer.FileSize This enumeration defines the file size exponents of the CalcFactor to calculate file sizes.

Method Summary

Methods

Modifier and Type	Method and Description
static long	getBytes(double value, FileSizeCalcer.CalcFactor factor, FileSizeCalcer.FileSize unit) Gets the size in bytes.
static long	getBytesFromKB(double kb) Converts KB to bytes with a factor of 1024.
static long	getBytesFromMB(double mb) Converts MB to bytes with a factor of 1024.
static double	getGB(long bytes) Calculates the file size in GigaByte of the given bytes.
static double	getKB(long bytes) Calculates the file size in KiloByte of the given bytes.
static double	getMB(long bytes) Calculates the file size in MegaByte of the given bytes.
static String	getNiceSize(long bytes, FileSizeCalcer.CalcFactor calcFactor) Computes the size using the specified factor and automatically adds the proper unit (B, KB or KiB, MB or MiB, GB or GiB, PB or PiB).
static double	getPB(long bytes) Calculates the file size in PetaByte of the given bytes.
static double	getSize(long bytes, FileSizeCalcer.CalcFactor factor, FileSizeCalcer.FileSize size) Returns the size according to the given parameters.
static double	getTB(long bytes) Calculates the file size in TeraByte of the given bytes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getSize

public static double getSize(long bytes,
             FileSizeCalcer.CalcFactor factor,
             FileSizeCalcer.FileSize size)

Returns the size according to the given parameters.

Parameters:

bytes - The number of bytes.

factor - The factor to be used to calculate the size (KIBI_FACTOR(1024) or KILO_FACTOR(1000)).

size - The desired file size.

Returns:

The calculated file size.

getKB

public static double getKB(long bytes)

Calculates the file size in KiloByte of the given bytes. Using a factor of 1024.

Parameters:

bytes - The number of bytes.

Returns:

The calculated file size.

getMB

public static double getMB(long bytes)

Calculates the file size in MegaByte of the given bytes. Using a factor of 1024.

Parameters:

bytes - The number of bytes.

Returns:

The calculated file size.

getGB

public static double getGB(long bytes)

Calculates the file size in GigaByte of the given bytes. Using a factor of 1024.

Parameters:

bytes - The number of bytes.

Returns:

The calculated file size.

getTB

public static double getTB(long bytes)

Calculates the file size in TeraByte of the given bytes. Using a factor of 1024.

Parameters:

bytes - The number of bytes.

Returns:

The calculated file size.

getPB

public static double getPB(long bytes)

Calculates the file size in PetaByte of the given bytes. Using a factor of 1024.

Parameters:

bytes - The number of bytes.

Returns:

The calculated file size.

getBytesFromMB

public static long getBytesFromMB(double mb)

Converts MB to bytes with a factor of 1024.

Parameters:

mb - size in MB

Returns:

size in bytes

getBytesFromKB

public static long getBytesFromKB(double kb)

Converts KB to bytes with a factor of 1024.

Parameters:

kb - size in KB

Returns:

size in bytes

getBytes

public static long getBytes(double value,
            FileSizeCalcer.CalcFactor factor,
            FileSizeCalcer.FileSize unit)

Gets the size in bytes.

Parameters:

value - the value of the file size

factor - the factor to calculate with

unit - the size unit of the file size

Returns:

the size in bytes

getNiceSize

public static String getNiceSize(long bytes,
                 FileSizeCalcer.CalcFactor calcFactor)

Computes the size using the specified factor and automatically adds the proper unit (B, KB or KiB, MB or MiB, GB or GiB, PB or PiB). The size is rounded to the next number. Example: 1135 with a factor of 1024 will result in "1 KiB".

Parameters:

bytes - size in bytes

calcFactor - the factor to use when calculating the size (1024 or 1000)

Returns:

formatted string with size and unit