Package org.apache.directory.api.util
Class Hex
- java.lang.Object
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- org.apache.directory.api.util.Hex
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public final class Hex extends Object
Various hex and string manipulation methods that are more efficient then chaining operations: all is done in the same buffer without creating a bunch of intermediate String objects.- Author:
- Apache Directory Project
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static byte[]
convertEscapedHex(String str)
Convert an escaoed list of bytes to a byte[]static String
decodeHexString(String str)
Decodes values of attributes in the DN encoded in hex into a UTF-8 String.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 byte
getHexValue(byte high, byte low)
Translate two bytes to an hex value.static byte
getHexValue(char c)
Return an hex value from a single char The char must be in [0-9a-fA-F]static byte
getHexValue(char high, char low)
Translate two chars to an hex value.
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Method Detail
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getHexValue
public static byte getHexValue(char high, char low)
Translate two chars to an hex value. The chars must be in [a-fA-F0-9]- Parameters:
high
- The high valuelow
- The low value- Returns:
- A byte representation of the two chars
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getHexValue
public static byte getHexValue(byte high, byte low)
Translate two bytes to an hex value. The bytes must be in [0-9a-fA-F]- Parameters:
high
- The high valuelow
- The low value- Returns:
- A byte representation of the two bytes
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getHexValue
public static byte getHexValue(char c)
Return an hex value from a single char The char must be in [0-9a-fA-F]- Parameters:
c
- The char we want to convert- Returns:
- A byte between 0 and 15
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decodeHexString
public static String decodeHexString(String str) throws InvalidNameException
Decodes values of attributes in the DN encoded in hex into a UTF-8 String. RFC2253 allows a DN's attribute to be encoded in hex. The encoded value starts with a # then is followed by an even number of hex characters.- Parameters:
str
- the string to decode- Returns:
- the decoded string
- Throws:
InvalidNameException
- If we can't decode the String to an UTF-8 String
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convertEscapedHex
public static byte[] convertEscapedHex(String str) throws InvalidNameException
Convert an escaoed list of bytes to a byte[]- Parameters:
str
- the string containing hex escapes- Returns:
- the converted byte[]
- Throws:
InvalidNameException
- If we can't convert the String to a byte[]
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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 hexadecimal characters
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