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Java Platform 1.2
Beta 4

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Class java.rmi.server.UID

java.lang.Object
  |
  +--java.rmi.server.UID

public final class UID

extends Object

implements Serializable

Abstraction for creating identifiers that are unique with respect to the the host on which it is generated.

See Also:

Serialized Form

Constructor Summary

UID()
Create a pure identifier that is unique with respect to the host on which it is generated.

UID(short num)
Create a "well-known" ID. There are 2^16 -1 such possible well-known ids.

Method Summary

boolean	equals(Object obj)
int	hashCode()
static UID	read(DataInput in) Get the uid from the input stream.
String	toString()
void	write(DataOutput out) Write uid to output stream.

Methods inherited from class java.lang.Object

clone , finalize , getClass , notify , notifyAll , wait , wait , wait

Constructor Detail

UID

public UID()

Create a pure identifier that is unique with respect to the host on which it is generated. This UID is unique under the following conditions: a) the machine takes more than one second to reboot, and b) the machine's clock is never set backward. In order to construct a UID that is globally unique, simply pair a UID with an InetAddress.

UID

public UID(short num)

Create a "well-known" ID. There are 2^16 -1 such possible well-known ids. An id generated via this constructor will not clash with any id generated via the default UID constructor which will generates a genuinely unique identifier with respect to this host.

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

write

public void write(DataOutput out)
           throws IOException

Write uid to output stream.

read

public static UID read(DataInput in)
                throws IOException

Get the uid from the input stream.

Parameters:

in - the input stream

Throws:

IOException - If uid could not be read (due to stream failure or malformed uid)