org.apache.openjpa.lib.util
Class UUIDGenerator
java.lang.Object
org.apache.openjpa.lib.util.UUIDGenerator
public class UUIDGenerator
- extends java.lang.Object
UUID value generator. Type 1 generator is based on the time-based generator
in the Apache Commons Id project: http://jakarta.apache.org/commons/sandbox
/id/uuid.html The type 4 generator uses the standard Java UUID generator.
The type 1 code has been vastly simplified and modified to replace the
ethernet address of the host machine with the IP, since we do not want to
require native libs and Java cannot access the MAC address directly.
In spirit, implements the IETF UUID draft specification, found here:
http://www1.ics.uci.edu/~ejw/authoring/uuid-guid/draft-leach-uuids-guids-01
.txt
- Since:
- 0.3.3
- Author:
- Abe White, Kevin Sutter
Method Summary |
static byte[] |
createType1()
|
static byte[] |
next(int type)
Return a unique UUID value. |
static java.lang.String |
nextHex(int type)
Return the next unique uuid value as a 32-character hex string. |
static java.lang.String |
nextString(int type)
Return the next unique uuid value as a 16-character string. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
TYPE1
public static final int TYPE1
- See Also:
- Constant Field Values
TYPE4
public static final int TYPE4
- See Also:
- Constant Field Values
UUIDGenerator
public UUIDGenerator()
next
public static byte[] next(int type)
- Return a unique UUID value.
createType1
public static byte[] createType1()
nextString
public static java.lang.String nextString(int type)
- Return the next unique uuid value as a 16-character string.
nextHex
public static java.lang.String nextHex(int type)
- Return the next unique uuid value as a 32-character hex string.