class DomainTagRepository extends AbstractRepository {

    /**
     * Public constructor.
     */
    public DomainTagRepository() {
        super(Domain.DOMAIN + "_" + Tag.TAG);
    }

    /**
     * Gets domain-tag relations by the specified domain id.
     *
     * @param domainId       the specified domain id
     * @param currentPageNum the specified current page number, MUST greater then {@code 0}
     * @param pageSize       the specified page size(count of a page contains objects), MUST greater then {@code 0}
     * @return for example      <pre>
     * {
     *     "pagination": {
     *       "paginationPageCount": 88250
     *     },
     *     "rslts": [{
     *         "oId": "",
     *         "domain_oId": domainId,
     *         "tag_oId": ""
     *     }, ....]
     * }
     * </pre>
     * @throws RepositoryException repository exception
     */
    public JSONObject getByDomainId(final String domainId, final int currentPageNum, final int pageSize)
            throws RepositoryException {
        final Query query = new Query().
                setFilter(new PropertyFilter(Domain.DOMAIN + "_" + Keys.OBJECT_ID, FilterOperator.EQUAL, domainId)).
                setPage(currentPageNum, pageSize).setPageCount(1);

        return get(query);
    }

    /**
     * Removes domain-tag relations by the specified domain id.
     *
     * @param domainId the specified domain id
     * @throws RepositoryException repository exception
     */
    public void removeByDomainId(final String domainId) throws RepositoryException {
        final Query query = new Query().setFilter(new PropertyFilter(Domain.DOMAIN + "_" + Keys.OBJECT_ID, FilterOperator.EQUAL, domainId));
        remove(query);
    }

    /**
     * Gets domain-tag relations by the specified tag id.
     *
     * @param tagId          the specified tag id
     * @param currentPageNum the specified current page number, MUST greater then {@code 0}
     * @param pageSize       the specified page size(count of a page contains objects), MUST greater then {@code 0}
     * @return for example      <pre>
     * {
     *     "pagination": {
     *       "paginationPageCount": 88250
     *     },
     *     "rslts": [{
     *         "oId": "",
     *         "domain_oId": "",
     *         "tag_oId": tagId
     *     }, ....]
     * }
     * </pre>
     * @throws RepositoryException repository exception
     */
    public JSONObject getByTagId(final String tagId, final int currentPageNum, final int pageSize)
            throws RepositoryException {<FILL_FUNCTION_BODY>}
}

        final Query query = new Query().
                setFilter(new PropertyFilter(Tag.TAG + "_" + Keys.OBJECT_ID, FilterOperator.EQUAL, tagId)).
                setPage(currentPageNum, pageSize).setPageCount(1);

        return get(query);
    
<no_super_class>