verinec.netsim.addresses
Class IPAddress

java.lang.Object
  verinec.netsim.addresses.IPAddress

All Implemented Interfaces:

Comparable, IAddress

Direct Known Subclasses:

IPAddressNetmask

public class IPAddress
extends Object
implements IAddress

This class is an IPAddress that uses internally a four byte representation. e.g. 192.168.0.1

Version:

$Revision:835 $

Author:

Dominik Jungo

Field Summary

private byte[]

address

Constructor Summary

IPAddress()
Constructs a new IPAddress with the value 0.0.0.0

IPAddress(byte i0, byte i1, byte i2, byte i3)
Constructs a new IPAddress with the value i0.i1.i2.i3

IPAddress(Inet4Address address)
Constructs a new IPAddress from a java Inet4Address

IPAddress(String address)
Constructs a new IPAddress form a String.

Method Summary

int	compareTo(IPAddress address, int part) compares a part of an ip address.
int	compareTo(Object arg0)
int	compareToDigitByDigit(IPAddress arg0)
private int	compareToPart(IPAddress address, int part) Starts comparing recursively this Address with address from the part'th byte on.
boolean	equals(IAddress address) Tests if an address is equal to this address.
private char	getAddressClass() gets the subnet class of the address (a, b, c, d or e)
byte	getPart(int i) gets the i'th byte of this Address.
IPAddress	getsubnetMask() gets the default subnet mask for this address.
protected void	setPart(int i, byte a) Sets the i'th byte of the Address to the value a.
byte[]	toByteArray() returns the array of the 4 bytes of this address
InetAddress	toInetAddress() returns a InetAddress coressponding this Address
String	toString() get the IPAddress in the dotted string representation.

Methods inherited from class java.lang.Object

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

Field Detail

address

private byte[] address

Constructor Detail

IPAddress

public IPAddress()

Constructs a new IPAddress with the value 0.0.0.0

IPAddress

public IPAddress(byte i0,
                 byte i1,
                 byte i2,
                 byte i3)

Constructs a new IPAddress with the value i0.i1.i2.i3

Parameters:

i0 - first byte of the Address

i1 - second byte of the Address

i2 - third byte of the Address

i3 - fourth byte of the Address

IPAddress

public IPAddress(Inet4Address address)

Constructs a new IPAddress from a java Inet4Address

Parameters:

address - a java Inet4Address

IPAddress

public IPAddress(String address)

Constructs a new IPAddress form a String.

Parameters:

address - in String representation with "."s between the four bytes. e.g "127.0.0.1"

Method Detail

compareTo

public int compareTo(IPAddress address,
                     int part)

compares a part of an ip address. a part means one of the four byte of the ip address

Parameters:

address - an address to compare

part - part to be compared

Returns:

a negative value if address is bigger than this address, 0 if they are equal and a positive value if this address is bigger.

compareTo

public int compareTo(Object arg0)

Specified by:

compareTo in interface Comparable

See Also:

Comparable.compareTo(java.lang.Object)

compareToDigitByDigit

public int compareToDigitByDigit(IPAddress arg0)

compareToPart

private int compareToPart(IPAddress address,
                          int part)

Starts comparing recursively this Address with address from the part'th byte on. Comparing is byte-wise.

Parameters:

address - an address to compare

part - starts comparing at this part value

Returns:

0 if the adresses are equal, -1 if this address is smaller and 1 if this address is bigger.

equals

public boolean equals(IAddress address)

Description copied from interface: IAddress

Tests if an address is equal to this address. Equal in this case does not mean the same address object but both represent the same address.

Specified by:

equals in interface IAddress

Parameters:

address - an address to compare with this Address

Returns:

true if both adresses have an equal String represenation, false otherwise.

See Also:

IAddress.equals(verinec.netsim.addresses.IAddress)

getAddressClass

private char getAddressClass()

gets the subnet class of the address (a, b, c, d or e)

Returns:

the subnet class of the address

getPart

public byte getPart(int i)

gets the i'th byte of this Address. i must be between 0 and 3.

Parameters:

i - the byte that should be returned

Returns:

the i'th byte of the Address

getsubnetMask

public IPAddress getsubnetMask()

gets the default subnet mask for this address. thee default subnet mask is one of the following:

• 255.0.0.0
• 255.255.0.0
• 255.255.255.0
• 255.255.255.255

Returns:

the default subnet mask for this address

setPart

protected void setPart(int i,
                       byte a)

Sets the i'th byte of the Address to the value a. i must be between 0 and 3.

Parameters:

i - the byte that sould be changed

a - the i'th byte value

toString

public String toString()

get the IPAddress in the dotted string representation. e.g. 192.168.0.1

Specified by:

toString in interface IAddress

Overrides:

toString in class Object

Returns:

this Address.

See Also:

IAddress.toString()

toInetAddress

public InetAddress toInetAddress()
                          throws UnknownHostException

returns a InetAddress coressponding this Address

Returns:

a InetAddress coressponding this Address

Throws:

UnknownHostException - if the InetAddress can't be build

toByteArray

public byte[] toByteArray()

returns the array of the 4 bytes of this address

Returns:

the array of the 4 bytes of this address