org.apache.tomcat.util.buf
Class HexUtils

java.lang.Object
  org.apache.tomcat.util.buf.HexUtils

public final class HexUtils
extends java.lang.Object

Library of utility methods useful in dealing with converting byte arrays to and from strings of hexadecimal digits. Code from Ajp11, from Apache's JServ.

Author:

Craig R. McClanahan

HEX

public static final byte[] HEX

Table for DEC to HEX byte translation.

HexUtils

public HexUtils()

getDec

public static int getDec(int index)

convert

public static byte[] convert(java.lang.String digits)

Convert a String of hexadecimal digits into the corresponding byte array by encoding each two hexadecimal digits as a byte.

Parameters:

digits - Hexadecimal digits representation

Throws:

java.lang.IllegalArgumentException - if an invalid hexadecimal digit is found, or the input string contains an odd number of hexadecimal digits

convert

public static java.lang.String convert(byte[] bytes)

Convert a byte array into a printable format containing a String of hexadecimal digit characters (two per byte).

Parameters:

bytes - Byte array representation

convert2Int

public static int convert2Int(byte[] hex)

Deprecated. Not used, will be removed in Tomcat 7

Convert 4 hex digits to an int, and return the number of converted bytes.

Parameters:

hex - Byte array containing exactly four hexadecimal digits

Throws:

java.lang.IllegalArgumentException - if an invalid hexadecimal digit is included