Package gnu.inet.encoding

Class IDNA

java.lang.Object

gnu.inet.encoding.IDNA

public class IDNA
extends Object

This class offers static methods for converting internationalized domain names to ACE and back.

• RFC3490 IDNA

Note that this implementation only supports 16-bit Unicode code points.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ACE_PREFIX

Constructor Summary

Constructors

Constructor	Description
IDNA()

Method Summary

Modifier and Type	Method	Description
static String	toASCII(String input)	Converts a Unicode string to ASCII using the procedure in RFC3490 section 4.1.
static String	toASCII(String input, boolean allowUnassigned, boolean useSTD3ASCIIRules)	Converts a Unicode string to ASCII using the procedure in RFC3490 section 4.1.
static String	toUnicode(String input)	Converts an ASCII-encoded string to Unicode.
static String	toUnicode(String input, boolean allowUnassigned, boolean useSTD3ASCIIRules)	Converts an ASCII-encoded string to Unicode.

Methods inherited from class java.lang.Object

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

Field Details

ACE_PREFIX

public static final String ACE_PREFIX

See Also:

• Constant Field Values

Constructor Details

IDNA

public IDNA()

Method Details

toASCII

public static String toASCII(String input)
                      throws IDNAException

Converts a Unicode string to ASCII using the procedure in RFC3490 section 4.1. Unassigned characters are not allowed and STD3 ASCII rules are enforced. The input string may be a domain name containing dots.

Parameters:

input - Unicode string.

Returns:

Encoded string.

Throws:

IDNAException

toASCII

public static String toASCII(String input,
 boolean allowUnassigned,
 boolean useSTD3ASCIIRules)
                      throws IDNAException

Converts a Unicode string to ASCII using the procedure in RFC3490 section 4.1. Unassigned characters are not allowed and STD3 ASCII rules are enforced.

Parameters:

input - Unicode string.

allowUnassigned - Unassigned characters, allowed or not?

useSTD3ASCIIRules - STD3 ASCII rules, enforced or not?

Returns:

Encoded string.

Throws:

IDNAException

toUnicode

public static String toUnicode(String input)

Converts an ASCII-encoded string to Unicode. Unassigned characters are not allowed and STD3 hostnames are enforced. Input may be domain name containing dots.

Parameters:

input - ASCII input string.

Returns:

Unicode string.

toUnicode

public static String toUnicode(String input,
 boolean allowUnassigned,
 boolean useSTD3ASCIIRules)

Converts an ASCII-encoded string to Unicode.

Parameters:

input - ASCII input string.

allowUnassigned - Allow unassigned Unicode characters.

useSTD3ASCIIRules - Check that the output conforms to STD3.

Returns:

Unicode string.