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java.lang.Object
   |
   +----edu.utah.janos.nodeos.Address

Summary

public class  Address
     extends java.lang.Object
{
          // Fields 4
     private final int anAddress;
     private static boolean gaveFactory;
     private final InetAddress iNetHostAddr;
     private final int iNetPort;

          // Constructors 2
     Address(Address);
     Address(int, InetAddress, int);

          // Methods 7
     public static int fromString(String) throws AddressFormatException;
     public static synchronized AddressFactory getAddressFactory();
     public static String toString(int);

     public int getANAddress();
     InetAddress iNetAddr();
     int iNetPort();
     public String toString();
}

An address object hides the details and implementation of addressing in Janos. Addresses can only be created through an AddressFactory. Only one instance of AddressFactory is created, to control who is allowed to create Addresses.

An Address has two parts a logical "active network" address and an underlying physical address. The physical address in this implementation of Address is an InetAddress and a UDP port number.

This implementation uses an IP host:port pair to indentify the underlying address. The Active address is a 32-bit IP-like number.

Address objects are immutable. They must be immutable because anyone(?) can read them out of routing tables..

Author:

Janos Ministry of Development

Cross Reference

Returned By:

AddressFactory.newAddress(), CommSpaceElement.getAddress(), AddressFactory.newAddress(), RouteEntry.getPhysicalNext()

   private static boolean gaveFactory

Flag to indicate if the factory has been given out or not. Once the factory has been created, no more are created.

   private final InetAddress iNetHostAddr

   private final int iNetPort

   private final int anAddress

Constructors

· Address

Summary  |  Top

   Address(int anAddress, 
           InetAddress iNetHostAddr, 
           int iNetPort) 

Construct a new Address. The address has two parts an "active address" and an "internet address". The "active address" is a 32-bit integer. The "internet address" consists of an java.net.InetAddress and an iNetPort number.

XXX replace the InetAddress with a string that will be decoded by the NodeOS..

   Address(Address other) 

   public static synchronized AddressFactory getAddressFactory() 

First caller wins. The first caller of this method gets a handle on the AddressFactory. Subsequent callers get diddly. Weak-ass access control, thank you very much.

XXX implications of the 'static'-ness of this method?

   public int getANAddress() 

   InetAddress iNetAddr() 

   int iNetPort() 

   public String toString() 

Overrides:

toString in class Object

   public static String toString(int a) 

Generate a string representation of the given address. Generates standard dotted-quad notation.

   public static int fromString(String name)  throws AddressFormatException

Generate a 32-bit integer from the given string address. The string must be a dotted-quad.

Throws: AddressFormatException

if there aren't 4 parts, any of the 4 parts don't parse, or are out of range.

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