Class Hex

java.lang.Object
org.apache.myfaces.util.lang.Hex

public class Hex extends Object
  • Constructor Summary

    Constructors
    Constructor
    Description
    Hex()
     
  • Method Summary

    Modifier and Type
    Method
    Description
    static byte[]
    decodeHex(char[] data)
    Converts an array of characters representing hexadecimal values into an array of bytes of those same values.
    static byte[]
    Converts a String representing hexadecimal values into an array of bytes of those same values.
    static char[]
    encodeHex(byte[] data)
    Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
    static char[]
    encodeHex(byte[] data, boolean toLowerCase)
    Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
    protected static char[]
    encodeHex(byte[] data, char[] toDigits)
    Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order.
    protected static int
    toDigit(char ch, int index)
    Converts a hexadecimal character to an integer.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Constructor Details

    • Hex

      public Hex()
  • Method Details

    • decodeHex

      public static byte[] decodeHex(String data) throws IllegalArgumentException
      Converts a String representing hexadecimal values into an array of bytes of those same values. The returned array will be half the length of the passed String, as it takes two characters to represent any given byte. An exception is thrown if the passed String has an odd number of elements.
      Parameters:
      data - A String containing hexadecimal digits
      Returns:
      A byte array containing binary data decoded from the supplied char array.
      Throws:
      IllegalArgumentException - Thrown if an odd number or illegal of characters is supplied
      Since:
      1.11
    • decodeHex

      public static byte[] decodeHex(char[] data) throws IllegalArgumentException
      Converts an array of characters representing hexadecimal values into an array of bytes of those same values. The returned array will be half the length of the passed array, as it takes two characters to represent any given byte. An exception is thrown if the passed char array has an odd number of elements.
      Parameters:
      data - An array of characters containing hexadecimal digits
      Returns:
      A byte array containing binary data decoded from the supplied char array.
      Throws:
      IllegalArgumentException - Thrown if an odd number or illegal of characters is supplied
    • encodeHex

      public static char[] encodeHex(byte[] data)
      Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte.
      Parameters:
      data - a byte[] to convert to Hex characters
      Returns:
      A char[] containing lower-case hexadecimal characters
    • encodeHex

      public static char[] encodeHex(byte[] data, boolean toLowerCase)
      Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte.
      Parameters:
      data - a byte[] to convert to Hex characters
      toLowerCase - true converts to lowercase, false to uppercase
      Returns:
      A char[] containing hexadecimal characters in the selected case
      Since:
      1.4
    • encodeHex

      protected static char[] encodeHex(byte[] data, char[] toDigits)
      Converts an array of bytes into an array of characters representing the hexadecimal values of each byte in order. The returned array will be double the length of the passed array, as it takes two characters to represent any given byte.
      Parameters:
      data - a byte[] to convert to Hex characters
      toDigits - the output alphabet (must contain at least 16 chars)
      Returns:
      A char[] containing the appropriate characters from the alphabet For best results, this should be either upper- or lower-case hex.
      Since:
      1.4
    • toDigit

      protected static int toDigit(char ch, int index) throws IllegalArgumentException
      Converts a hexadecimal character to an integer.
      Parameters:
      ch - A character to convert to an integer digit
      index - The index of the character in the source
      Returns:
      An integer
      Throws:
      IllegalArgumentException - Thrown if ch is an illegal hex character