org.argeo.api.uuid/src/org/argeo/api/uuid/BasicNameUuid.java

   1 package org.argeo.api.uuid;
   2
   3 import java.util.UUID;
   4
   5 /** A name based UUID (v3 or v5) whose construction values are not known. */
   6 public class BasicNameUuid extends TypedUuid {
   7         private static final long serialVersionUID = APM.SERIAL;
   8
   9         public BasicNameUuid(UUID uuid) {
  10                 super(uuid);
  11                 if ((uuid.version() != 5 && uuid.version() != 3) || uuid.variant() != 2)
  12                         throw new IllegalArgumentException("The provided UUID is not a name-based UUID.");
  13         }
  14
  15         /**
  16          * Always returns <code>true</code> since it is unknown from which values it was
  17          * constructed..
  18          */
  19         @Override
  20         public boolean isOpaque() {
  21                 return true;
  22         }
  23
  24         /**
  25          * Whether the hash of this name UUID was generated with SHA-1 (v5) or with MD5
  26          * (v3).
  27          */
  28         public boolean isSha1() {
  29                 return uuid.version() == 5;
  30         }
  31 }