Package com.openstego.desktop.util

Class CommonUtil

java.lang.Object
com.openstego.desktop.util.CommonUtil
public class CommonUtil extends Object
Common utilities for OpenStego

  • Method Summary

    Modifier and Type
    Method
    Description
    static int
    byteToInt(int b)
    Byte to Int converter
    static int
    ceilingHalf(int num)
    Returns the ceiling of the half of the input value
    static int
    floorHalf(int num)
    Returns the floor of the half of the input value
    static byte[]
    getFileBytes(File file)
    Method to get byte array data from given file
    static byte[]
    getStreamBytes(InputStream is)
    Method to get byte array data from given InputStream
    static double
    max(double x, double y)
    Get maximum of two given values
    static int
    max(int x, int y)
    Get maximum of two given values
    static double
    min(double x, double y)
    Get minimum of two given values
    static int
    min(int x, int y)
    Get minimum of two given values
    static int
    mod(int num, int div)
    Returns the modulus of the input value (taking care of the sign of the value)
    static List<File>
    parseFileList(String fileList, String delimiter)
    Method to parse a delimiter separated list of files into arraylist of filenames.
    static void
    setEnabled(JTextField textField, boolean enabled)
    Method to enable/disable a Swing JTextField object
    static void
    writeFile(byte[] fileData, File file)
    Method to write file data to disk
    static void
    writeFile(byte[] fileData, String fileName)
    Method to write file data to disk

    Methods inherited from class java.lang.Object

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

  • Method Details

    • getStreamBytes

      public static byte[] getStreamBytes(InputStream is) throws OpenStegoException
      Method to get byte array data from given InputStream
      Parameters:
      is - InputStream to read
      Returns:
      Stream data as byte array
      Throws:
      OpenStegoException

    • getFileBytes

      public static byte[] getFileBytes(File file) throws OpenStegoException
      Method to get byte array data from given file
      Parameters:
      file - File to read
      Returns:
      File data as byte array
      Throws:
      OpenStegoException

    • writeFile

      public static void writeFile(byte[] fileData, String fileName) throws OpenStegoException
      Method to write file data to disk
      Parameters:
      fileData - File data
      fileName - File name (If this is null, then data is written to stdout)
      Throws:
      OpenStegoException

    • writeFile

      public static void writeFile(byte[] fileData, File file) throws OpenStegoException
      Method to write file data to disk
      Parameters:
      fileData - File data
      file - File object (If this is null, then data is written to stdout)
      Throws:
      OpenStegoException

    • setEnabled

      public static void setEnabled(JTextField textField, boolean enabled)
      Method to enable/disable a Swing JTextField object
      Parameters:
      textField - Swing JTextField object
      enabled - Flag to indicate whether to enable or disable the object

    • parseFileList

      public static List<File> parseFileList(String fileList, String delimiter)
      Method to parse a delimiter separated list of files into arraylist of filenames. It supports wildcard characters "*" and "?" within the filenames.
      Parameters:
      fileList - Delimiter separated list of filenames
      delimiter - Delimiter for tokenization
      Returns:
      List of filenames after tokenizing and wildcard expansion

    • byteToInt

      public static int byteToInt(int b)
      Byte to Int converter
      Parameters:
      b - Input byte value
      Returns:
      Int value

    • floorHalf

      public static int floorHalf(int num)
      Returns the floor of the half of the input value
      Parameters:
      num - Input number
      Returns:
      Floor of the half of the input number

    • ceilingHalf

      public static int ceilingHalf(int num)
      Returns the ceiling of the half of the input value
      Parameters:
      num - Input number
      Returns:
      Ceiling of the half of the input number

    • mod

      public static int mod(int num, int div)
      Returns the modulus of the input value (taking care of the sign of the value)
      Parameters:
      num - Input number
      div - Divisor for modulus
      Returns:
      Modulus of num by div

    • max

      public static int max(int x, int y)
      Get maximum of two given values
      Parameters:
      x - Value 1
      y - value 2
      Returns:
      Max of the two values

    • max

      public static double max(double x, double y)
      Get maximum of two given values
      Parameters:
      x - Value 1
      y - value 2
      Returns:
      Max of the two values

    • min

      public static int min(int x, int y)
      Get minimum of two given values
      Parameters:
      x - Value 1
      y - value 2
      Returns:
      Min of the two values

    • min

      public static double min(double x, double y)
      Get minimum of two given values
      Parameters:
      x - Value 1
      y - value 2
      Returns:
      Min of the two values