com.db4o.ext

Class Db4oUUID

java.lang.Object

com.db4o.ext.Db4oUUID

public class Db4oUUID
extends java.lang.Object

a unique universal identify for an object.

The db4o UUID consists of two parts:
- an indexed long for fast access,
- the signature of the ObjectContainer the object was created with.

Db4oUUIDs are valid representations of objects over multiple ObjectContainers

Constructor Summary

Constructors

Constructor and Description
Db4oUUID(long longPart_, byte[] signaturePart_) constructs a Db4oUUID from a long part and a signature part

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
long	getLongPart() returns the long part of this UUID.
byte[]	getSignaturePart() returns the signature part of this UUID.
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Db4oUUID

public Db4oUUID(long longPart_,
        byte[] signaturePart_)

constructs a Db4oUUID from a long part and a signature part

Parameters:

longPart_ - the long part

signaturePart_ - the signature part

Method Detail

getLongPart

public long getLongPart()

returns the long part of this UUID.

To uniquely identify an object universally, db4o uses an indexed long and a reference to the Db4oDatabase object it was created on.

Returns:

the long part of this UUID.

getSignaturePart

public byte[] getSignaturePart()

returns the signature part of this UUID.



To uniquely identify an object universally, db4o uses an indexed long and a reference to the Db4oDatabase singleton object of the ObjectContainer it was created on. This method returns the signature of the Db4oDatabase object of the ObjectContainer: the signature of the origin ObjectContainer.

Returns:

the signature of the Db4oDatabase for this UUID.

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object