Package org.ldaptive.io

Class Hex

java.lang.Object
org.ldaptive.io.Hex
public final class Hex extends Object
Utility for hexadecimal encoding and decoding.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private static final byte[]
    DECODE
    Decode table which stores characters from 0 to f.
    private static final char[]
    HEX_CHARS
    Hexadecimal characters.

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    private
    Hex()
    Default constructor.

  • Method Summary

    Modifier and Type
    Method
    Description
    static byte[]
    decode(char... value)
    This will convert the supplied value from a hex encoded string.
    private static int
    decode(char[] hex, int i)
    Decodes the supplied character to its corresponding nibble.
    static char[]
    encode(byte... value)
    This will convert the supplied value to a hex encoded string.
    static boolean
    isValidChar(char c)
    Returns whether the supplied character is a hexadecimal character.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • HEX_CHARS

      private static final char[] HEX_CHARS
      Hexadecimal characters.

    • DECODE

      private static final byte[] DECODE
      Decode table which stores characters from 0 to f. Anything higher than 'f' is invalid so that is the max size of the array.

  • Constructor Details

    • Hex

      private Hex()
      Default constructor.

  • Method Details

    • isValidChar

      public static boolean isValidChar(char c)
      Returns whether the supplied character is a hexadecimal character. Valid characters include 0-9, a-f and A-F
      Parameters:
      c - to inspect
      Returns:
      whether the supplied character is hexadecimal

    • encode

      public static char[] encode(byte... value)
      This will convert the supplied value to a hex encoded string. Returns null if the supplied value is null.
      Parameters:
      value - to hex encode
      Returns:
      hex encoded value

    • decode

      public static byte[] decode(char... value)
      This will convert the supplied value from a hex encoded string. Returns null if the supplied value is null.
      Parameters:
      value - to hex decode
      Returns:
      hex decoded value
      Throws:
      IllegalArgumentException - if value is not valid hexadecimal

    • decode

      private static int decode(char[] hex, int i)
      Decodes the supplied character to its corresponding nibble.
      Parameters:
      hex - to read character from
      i - index of hex to read
      Returns:
      0-15 integer
      Throws:
      IllegalArgumentException - if the character is not valid hex