org.openbp.common.util
Class UUIDGenerator

java.lang.Object
  org.openbp.common.util.UUIDGenerator

public final class UUIDGenerator
extends java.lang.Object

UUID generator. Generates a universally unique id based on the ip address of the computer and the current time. This class is a singleton.

Author:

Heiko Erhardt

Method Summary

static void	appendHexValue(java.lang.StringBuffer sb, long value, int digits) Appends a hexadecimal value to the given string buffer.
java.lang.String	createUUID() Creates a new UUID.
static UUIDGenerator	getInstance() Gets the singleton instance of this class.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static UUIDGenerator getInstance()

Gets the singleton instance of this class.

createUUID

public java.lang.String createUUID()

Creates a new UUID.

Returns:

The UUID (20 hex digits) or null on error (shouldn't happen)

appendHexValue

public static void appendHexValue(java.lang.StringBuffer sb,
                                  long value,
                                  int digits)

Appends a hexadecimal value to the given string buffer.

Parameters:

sb - String buffer to append to

value - The value to append

digits - Minimum number of digits
The method will insert leading '0' fill characters.