this.existNextPage = existNextPage;
    }

    public int getPageSize() {
        if (pageSize <= 0) {
            pageSize = getDefaultPageSize();
        }
        return pageSize;
    }

    public void setPageSize(final int pageSize) {
        this.pageSize = pageSize;
    }

    public int getCurrentPageNumber() {
        if (currentPageNumber <= 0) {

        this.existNextPage = existNextPage;
    }

    public int getPageSize() {
        if (pageSize <= 0) {
            pageSize = getDefaultPageSize();
        }
        return pageSize;
    }

    public void setPageSize(final int pageSize) {
        this.pageSize = pageSize;
    }

    public int getCurrentPageNumber() {
        if (currentPageNumber <= 0) {

        this.existNextPage = existNextPage;
    }

    public int getPageSize() {
        if (pageSize <= 0) {
            pageSize = getDefaultPageSize();
        }
        return pageSize;
    }

    public void setPageSize(final int pageSize) {
        this.pageSize = pageSize;
    }

    public int getCurrentPageNumber() {
        if (currentPageNumber <= 0) {

        this.existNextPage = existNextPage;
    }

    public int getPageSize() {
        if (pageSize <= 0) {
            pageSize = getDefaultPageSize();
        }
        return pageSize;
    }

    public void setPageSize(final int pageSize) {
        this.pageSize = pageSize;
    }

    public int getCurrentPageNumber() {
        if (currentPageNumber <= 0) {

        this.existNextPage = existNextPage;
    }

    public int getPageSize() {
        if (pageSize <= 0) {
            pageSize = getDefaultPageSize();
        }
        return pageSize;
    }

    public void setPageSize(final int pageSize) {
        this.pageSize = pageSize;
    }

    public int getCurrentPageNumber() {
        if (currentPageNumber <= 0) {

        this.existNextPage = existNextPage;
    }

    public int getPageSize() {
        if (pageSize <= 0) {
            pageSize = getDefaultPageSize();
        }
        return pageSize;
    }

    public void setPageSize(final int pageSize) {
        this.pageSize = pageSize;
    }

    public int getCurrentPageNumber() {
        if (currentPageNumber <= 0) {

        return getProtwordsFile(dictId).map(file -> {
            final int pageSize = protwordsPager.getPageSize();
            final PagingList<ProtwordsItem> protwordsList =
                    file.selectList((protwordsPager.getCurrentPageNumber() - 1) * pageSize, pageSize);

            // update pager

        return getStopwordsFile(dictId).map(file -> {
            final int pageSize = stopwordsPager.getPageSize();
            final PagingList<StopwordsItem> stopwordsList =
                    file.selectList((stopwordsPager.getCurrentPageNumber() - 1) * pageSize, pageSize);

            // update pager

        return true;
    }

    @Override
    public void paging(int pageSize, int pageNumber) {
        if (pageSize <= 0) {
            throwPagingPageSizeNotPlusException(pageSize, pageNumber);
        }
        fetchFirst(pageSize);
        xfetchPage(pageNumber);
    }

    protected void throwPagingPageSizeNotPlusException(int pageSize, int pageNumber) {

        return getKuromojiFile(dictId).map(file -> {
            final int pageSize = kuromojiPager.getPageSize();
            final PagingList<KuromojiItem> kuromojiList = file.selectList((kuromojiPager.getCurrentPageNumber() - 1) * pageSize, pageSize);

            // update pager