nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/manager/GroupId.java

   1 package org.asamk.signal.manager;
   2
   3 import org.whispersystems.util.Base64;
   4
   5 import java.util.Arrays;
   6
   7 public abstract class GroupId {
   8
   9     private final byte[] id;
  10
  11     public static GroupIdV1 v1(byte[] id) {
  12         return new GroupIdV1(id);
  13     }
  14
  15     public static GroupIdV2 v2(byte[] id) {
  16         return new GroupIdV2(id);
  17     }
  18
  19     public static GroupId unknownVersion(byte[] id) {
  20         if (id.length == 16) {
  21             return new GroupIdV1(id);
  22         } else if (id.length == 32) {
  23             return new GroupIdV2(id);
  24         }
  25
  26         throw new AssertionError("Invalid group id of size " + id.length);
  27     }
  28
  29     public static GroupId fromBase64(String id) throws GroupIdFormatException {
  30         try {
  31             return unknownVersion(java.util.Base64.getDecoder().decode(id));
  32         } catch (Throwable e) {
  33             throw new GroupIdFormatException(id, e);
  34         }
  35     }
  36
  37     public GroupId(final byte[] id) {
  38         this.id = id;
  39     }
  40
  41     public byte[] serialize() {
  42         return id;
  43     }
  44
  45     public String toBase64() {
  46         return Base64.encodeBytes(id);
  47     }
  48
  49     @Override
  50     public boolean equals(final Object o) {
  51         if (this == o) return true;
  52         if (o == null || getClass() != o.getClass()) return false;
  53
  54         final GroupId groupId = (GroupId) o;
  55
  56         return Arrays.equals(id, groupId.id);
  57     }
  58
  59     @Override
  60     public int hashCode() {
  61         return Arrays.hashCode(id);
  62     }
  63 }