org.xbill.DNS

Class ReverseMap

java.lang.Object

org.xbill.DNS.ReverseMap

public final class ReverseMap
extends java.lang.Object

A set of functions designed to deal with DNS names used in reverse mappings. For the IPv4 address a.b.c.d, the reverse map name is d.c.b.a.in-addr.arpa. For an IPv6 address, the reverse map name is ...ip6.arpa.

Field Summary

Fields

Modifier and Type	Field and Description
private static Name	inaddr4
private static Name	inaddr6

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ReverseMap()

Method Summary

Modifier and Type	Method and Description
static Name	fromAddress(byte[] addr) Creates a reverse map name corresponding to an address contained in an array of 4 bytes (for an IPv4 address) or 16 bytes (for an IPv6 address).
static Name	fromAddress(java.net.InetAddress addr) Creates a reverse map name corresponding to an address contained in an InetAddress.
static Name	fromAddress(int[] addr) Creates a reverse map name corresponding to an address contained in an array of 4 integers between 0 and 255 (for an IPv4 address) or 16 integers between 0 and 255 (for an IPv6 address).
static Name	fromAddress(java.lang.String addr) Creates a reverse map name corresponding to an address contained in a String.
static Name	fromAddress(java.lang.String addr, int family) Creates a reverse map name corresponding to an address contained in a String.
static java.net.InetAddress	fromName(Name name) Parses the address from a reverse map name.
static java.net.InetAddress	fromName(java.lang.String name) Parses the address from a reverse map string.

Methods inherited from class java.lang.Object

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

Field Detail

inaddr4

private static final Name inaddr4

inaddr6

private static final Name inaddr6

Constructor Detail

ReverseMap

private ReverseMap()

Method Detail

fromAddress

public static Name fromAddress(byte[] addr)

Creates a reverse map name corresponding to an address contained in an array of 4 bytes (for an IPv4 address) or 16 bytes (for an IPv6 address).

Parameters:

addr - The address from which to build a name.

Returns:

The name corresponding to the address in the reverse map.

fromAddress

public static Name fromAddress(int[] addr)

Creates a reverse map name corresponding to an address contained in an array of 4 integers between 0 and 255 (for an IPv4 address) or 16 integers between 0 and 255 (for an IPv6 address).

Parameters:

addr - The address from which to build a name.

Returns:

The name corresponding to the address in the reverse map.

fromAddress

public static Name fromAddress(java.net.InetAddress addr)

Creates a reverse map name corresponding to an address contained in an InetAddress.

Parameters:

addr - The address from which to build a name.

Returns:

The name corresponding to the address in the reverse map.

fromAddress

public static Name fromAddress(java.lang.String addr,
                               int family)
                        throws java.net.UnknownHostException

Creates a reverse map name corresponding to an address contained in a String.

Parameters:

addr - The address from which to build a name.

Returns:

The name corresponding to the address in the reverse map.

Throws:

java.net.UnknownHostException - The string does not contain a valid address.

fromAddress

public static Name fromAddress(java.lang.String addr)
                        throws java.net.UnknownHostException

Creates a reverse map name corresponding to an address contained in a String.

Parameters:

addr - The address from which to build a name.

Returns:

The name corresponding to the address in the reverse map.

Throws:

java.net.UnknownHostException - The string does not contain a valid address.

fromName

public static java.net.InetAddress fromName(java.lang.String name)
                                     throws java.net.UnknownHostException,
                                            TextParseException

Parses the address from a reverse map string.

Parameters:

name - The string from which to build an address.

Returns:

The address corresponding to the reverse map string.

Throws:

java.net.UnknownHostException - the passed name is not a valid reverse map.

TextParseException

Since:

3.1

fromName

public static java.net.InetAddress fromName(Name name)
                                     throws java.net.UnknownHostException

Parses the address from a reverse map name.

Parameters:

name - The name from which to build an address.

Returns:

The address corresponding to the reverse map name.

Throws:

java.net.UnknownHostException - the passed name is not a valid reverse map.

Since:

3.1