NodeIdSupplier.java

   1 package org.argeo.api.uuid;
   2
   3 import java.util.function.Supplier;
   4
   5 /** A factory for node id base */
   6 public interface NodeIdSupplier extends Supplier<Long> {
   7         long LEAST_SIG_RFC4122_VARIANT = (1l << 63);
   8
   9         static long toNodeIdBase(byte[] node) {
  10                 assert node.length == 6;
  11                 return LEAST_SIG_RFC4122_VARIANT // base for Leach–Salz UUID
  12                                 | (node[0] & 0xFFL) //
  13                                 | ((node[1] & 0xFFL) << 8) //
  14                                 | ((node[2] & 0xFFL) << 16) //
  15                                 | ((node[3] & 0xFFL) << 24) //
  16                                 | ((node[4] & 0xFFL) << 32) //
  17                                 | ((node[5] & 0xFFL) << 40); //
  18         }
  19
  20 }