private static final UserInfoDbm _instance = new UserInfoDbm();

    private UserInfoDbm() {
    }

    public static UserInfoDbm getInstance() {
        return _instance;
    }

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

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

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

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

  }

  @Override
  public String toString() {
    return toString;
  }

  private static MessageDigest getMessageDigest(String algorithmName) {
    try {
      return MessageDigest.getInstance(algorithmName);
    } catch (NoSuchAlgorithmException e) {
      throw new AssertionError(e);
    }
  }

  @Override
  public Hasher newHasher() {
    if (supportsClone) {
      try {

    private static final CrawlingInfoDbm _instance = new CrawlingInfoDbm();

    private CrawlingInfoDbm() {
    }

    public static CrawlingInfoDbm getInstance() {
        return _instance;
    }

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

    }

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

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

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

    }

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

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

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

        return "job_log";
    }

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

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

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

        return "role_type";
    }

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

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

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

    }

    @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 {

                NtlmFlags.NTLMSSP_NEGOTIATE_ALWAYS_SIGN |
                NtlmFlags.NTLMSSP_NEGOTIATE_KEY_EXCH;
        }
        this.workstation = Type1Message.getDefaultWorkstation();
        log = LogStream.getInstance();
    }

    public String toString() {
        String ret = "NtlmContext[auth=" + auth +
            ",ntlmsspFlags=0x" + Hexdump.toHexString(ntlmsspFlags, 8) +
            ",workstation=" + workstation +