Package com.saperion.util

Class FileSizeCalcer

  • public final class FileSizeCalcer
extends java.lang.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 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

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method 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 java.lang.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 java.lang.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