//                                                                             DB Meta
    //                                                                             =======
    @Override
    public RoleDbm asDBMeta() {
        return RoleDbm.getInstance();
    }

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

    //                                                                             DB Meta
    //                                                                             =======
    @Override
    public UserInfoDbm asDBMeta() {
        return UserInfoDbm.getInstance();
    }

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

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

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

    @Override
    public boolean hasSpecifiedColumn() {

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

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

    @Override
    public boolean hasSpecifiedColumn() {

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

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

    @Override
    public boolean hasSpecifiedColumn() {

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

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

    @Override
    public boolean hasSpecifiedColumn() {

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

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

    @Override

    //                                                                             DB Meta
    //                                                                             =======
    @Override
    public DuplicateHostDbm asDBMeta() {
        return DuplicateHostDbm.getInstance();
    }

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

    //                                                                             DB Meta
    //                                                                             =======
    @Override
    public ThumbnailQueueDbm asDBMeta() {
        return ThumbnailQueueDbm.getInstance();
    }

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

    //                                                                             DB Meta
    //                                                                             =======
    @Override
    public CrawlingInfoDbm asDBMeta() {
        return CrawlingInfoDbm.getInstance();
    }

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