org.argeo.api.acr/src/org/argeo/api/acr/uuid/TimeUuidState.java

   1 package org.argeo.api.acr.uuid;
   2
   3 import java.time.Instant;
   4 import java.time.ZoneOffset;
   5 import java.time.ZonedDateTime;
   6
   7 /**
   8  * The state of a time based UUID generator, as described and discussed in
   9  * section 4.2.1 of RFC4122.
  10  *
  11  * @see https://datatracker.ietf.org/doc/html/rfc4122#section-4.2.1
  12  */
  13 public interface TimeUuidState {
  14
  15         /** Start of the Gregorian time, used by time-based UUID (v1). */
  16         final static Instant GREGORIAN_START = ZonedDateTime.of(1582, 10, 15, 0, 0, 0, 0, ZoneOffset.UTC).toInstant();
  17
  18         long useTimestamp();
  19
  20         long getClockSequence();
  21
  22         static boolean isNoMacAddressNodeId(byte[] nodeId) {
  23                 return (nodeId[0] & 1) != 0;
  24         }
  25
  26         static class Holder {
  27                 long lastTimestamp;
  28                 long clockSequence;
  29
  30                 public long getLastTimestamp() {
  31                         return lastTimestamp;
  32                 }
  33
  34                 public void setLastTimestamp(long lastTimestamp) {
  35                         this.lastTimestamp = lastTimestamp;
  36                 }
  37
  38                 public long getClockSequence() {
  39                         return clockSequence;
  40                 }
  41
  42                 public void setClockSequence(long clockSequence) {
  43                         this.clockSequence = clockSequence;
  44                 }
  45
  46         }
  47 }