}

    @Override
    public String asEsSearchType() {
        return "thumbnail_queue";
    }

    @Override
    public ThumbnailQueueDbm asDBMeta() {
        return ThumbnailQueueDbm.getInstance();
    }

    @Override
    protected <RESULT extends ThumbnailQueue> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {

        return "role";
    }

    @Override
    public String asEsSearchType() {
        return "role";
    }

    @Override
    public RoleDbm asDBMeta() {
        return RoleDbm.getInstance();
    }

    @Override
    protected <RESULT extends Role> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();

        return "click_log";
    }

    @Override
    public String asEsSearchType() {
        return "click_log";
    }

    @Override
    public ClickLogDbm asDBMeta() {
        return ClickLogDbm.getInstance();
    }

    @Override
    protected <RESULT extends ClickLog> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {

  @Override
  protected Map<Class<? extends B>, B> delegate() {
    return delegate;
  }

  @Override
  @SuppressWarnings("unchecked") // value could not get in if not a T
  public <T extends B> @Nullable T getInstance(Class<T> type) {
    return (T) delegate.get(checkNotNull(type));
  }

  /**
   * Guaranteed to throw an exception and leave the map unmodified.
   *
   * @throws UnsupportedOperationException always

    private static final FailureUrlDbm _instance = new FailureUrlDbm();

    private FailureUrlDbm() {
    }

    public static FailureUrlDbm getInstance() {
        return _instance;
    }

    // ===================================================================================
    //                                                                       Current DBDef

    private final GSSName serviceName;

    Kerb5Context(String host, String service, String name, int userLifetime, int contextLifetime, String realm) throws GSSException {
        GSSManager manager = GSSManager.getInstance();
        GSSCredential clientCreds = null;
        Oid mechOid = JGSS_KRB5_MECH_OID;
        if (realm != null) {

    //                                                                             =======
    @Override
    public AccessTokenDbm asDBMeta() {
        return AccessTokenDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "access_token";
    }

    // ===================================================================================

    //                                                                             =======
    @Override
    public FileConfigDbm asDBMeta() {
        return FileConfigDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "file_config";
    }

    @Override
    public boolean hasSpecifiedColumn() {
        return _specification != null;
    }

    //                                                                             =======
    @Override
    public SearchLogDbm asDBMeta() {
        return SearchLogDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "search_log";
    }

    @Override
    public boolean hasSpecifiedColumn() {
        return _specification != null;
    }

  }

  private static void assertMessageDigestHashing(byte[] input, String algorithmName)
      throws NoSuchAlgorithmException {
    MessageDigest digest = MessageDigest.getInstance(algorithmName);
    assertEquals(
        HashCode.fromBytes(digest.digest(input)), ALGORITHMS.get(algorithmName).hashBytes(input));
    for (int bytes = 4; bytes <= digest.getDigestLength(); bytes++) {
      assertEquals(