java.lang.Object
- com.arjuna.ats.arjuna.common.Uid

All Implemented Interfaces:

Serializable, Cloneable
```
public class Uid
extends Object
implements Cloneable, Serializable
```
Implements a unique identity class. Since 4.9 each instance is immutable.

Since:

1.0.

Version:

$Id: Uid.java 2342 2006-03-30 13:06:17Z $

Author:

Mark Little (mark@arjuna.com)

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

protected long[] hostAddr

protected int other

protected int process

protected int sec

static int UID_SIZE

Constructor Summary

Constructors
Constructor	Description
`Uid()`	Create a new instance.
`Uid(byte[] byteForm)`
`Uid(long[] addr, int processId, int time, int incr)`
`Uid(Uid copyFrom)`	Create a copy of the specified identifier.
`Uid(String uidString)`	Create Uid from string representation.
`Uid(String uidString, boolean errsOk)`	Create Uid from string representation.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`clone()`	Create a copy of this instance.
`boolean`	`equals(Uid u)`
`boolean`	`equals(Object o)`	Override Object.equals
`String`	`fileStringForm()`
`byte[]`	`getBytes()`	Get the byte representation of the Uid.
`String`	`getHexPid()`
`boolean`	`greaterThan(Uid u)`
`int`	`hashCode()`	Override Object.hashCode.
`static Uid`	`lastResourceUid()`	Return a last resource Uid (0:0:0:0:1)
`boolean`	`lessThan(Uid u)`
`static Uid`	`maxUid()`	Return the maximum Uid (7fffffffffffffff:7fffffffffffffff:7fffffff:7fffffff:7fffffff)
`static Uid`	`minUid()`	Return the minimum Uid (-8000000000000000:-8000000000000000:-80000000:-80000000:-80000000)
`boolean`	`notEquals(Uid u)`
`static Uid`	`nullUid()`	Return a null Uid (0:0:0:0:0)
`void`	`print(PrintStream strm)`	Print a human-readable form of the Uid.
`String`	`stringForm()`
`String`	`toString()`	Same as stringForm()
`boolean`	`valid()`	Is the Uid valid?

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - hostAddr
```
protected volatile long[] hostAddr
```
  - process
```
protected volatile int process
```
  - sec
```
protected volatile int sec
```
  - other
```
protected volatile int other
```
  - UID_SIZE
```
public static final int UID_SIZE
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - Uid
```
public Uid()
```
    Create a new instance.
  - Uid
```
public Uid(Uid copyFrom)
```
    Create a copy of the specified identifier.
  - Uid
```
public Uid(byte[] byteForm)
```
  - Uid
```
public Uid(String uidString)
```
    Create Uid from string representation. If the string does not represent a valid Uid then the instance will be set to nullUid.
  - Uid
```
public Uid(String uidString,
           boolean errsOk)
```
    Create Uid from string representation. boolean arg says whether to give up if an error is detected or to simply replace with nullUid.
  - Uid
```
public Uid(long[] addr,
           int processId,
           int time,
           int incr)
```
- Method Detail
  - hashCode
```
public int hashCode()
```
    Override Object.hashCode. We always return a positive value.
    
    Overrides:
    
    hashCode in class Object
  - print
```
public void print(PrintStream strm)
```
    Print a human-readable form of the Uid.
  - stringForm
```
public String stringForm()
```
  - fileStringForm
```
public String fileStringForm()
```
    Returns:
    
    a string representation of the Uid with all : replaced by _ so that the name may be used as a file name.
  - getBytes
```
public byte[] getBytes()
```
    Get the byte representation of the Uid. Useful for packing and creating other representations of transaction ids.
    
    Returns:
    
    the byte array. Cached once created.
  - toString
```
public String toString()
```
    Same as stringForm()
    
    Overrides:
    
    toString in class Object
  - getHexPid
```
public String getHexPid()
```
  - clone
```
public Object clone()
             throws CloneNotSupportedException
```
    Create a copy of this instance.
    
    Overrides:
    
    clone in class Object
    
    Throws:
    
    CloneNotSupportedException
  - equals
```
public boolean equals(Object o)
```
    Override Object.equals
    
    Overrides:
    
    equals in class Object
  - equals
```
public boolean equals(Uid u)
```
  - notEquals
```
public boolean notEquals(Uid u)
```
  - lessThan
```
public boolean lessThan(Uid u)
```
  - greaterThan
```
public boolean greaterThan(Uid u)
```
  - valid
```
public final boolean valid()
```
    Is the Uid valid?
  - nullUid
```
public static final Uid nullUid()
```
    Return a null Uid (0:0:0:0:0)
  - lastResourceUid
```
public static final Uid lastResourceUid()
```
    Return a last resource Uid (0:0:0:0:1)
  - maxUid
```
public static final Uid maxUid()
```
    Return the maximum Uid (7fffffffffffffff:7fffffffffffffff:7fffffff:7fffffff:7fffffff)
  - minUid
```
public static final Uid minUid()
```
    Return the minimum Uid (-8000000000000000:-8000000000000000:-80000000:-80000000:-80000000)

Modifier and Type	Field	Description
`protected long[]`	`hostAddr`
`protected int`	`other`
`protected int`	`process`
`protected int`	`sec`
`static int`	`UID_SIZE`

Class Uid

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

hostAddr

process

sec

other

UID_SIZE

Constructor Detail

Uid

Uid

Uid

Uid

Uid

Uid

Method Detail

hashCode

print

stringForm

fileStringForm

getBytes

toString

getHexPid

clone

equals

equals

notEquals

lessThan

greaterThan

valid

nullUid

lastResourceUid

maxUid

minUid