/**
* Executes a native count(*) request to count the number of results.
*
* @param paginatedList Paginated list object containing parameters, and into which results are
* added by side effects
* @param queryParam Query parameters
*/
public static <E> void executeCountQuery(PaginatedList<E> paginatedList, QueryParam queryParam) {
StringBuilder sb = new StringBuilder("select count(*) as result_count from (");
sb.append(queryParam.getQueryString());
sb.append(") as t1");
QueryParam countQueryParam = new QueryParam(sb.toString(), queryParam.getParameterMap());
Query q = QueryUtil.getNativeQuery(countQueryParam);
Number resultCount = (Number) q.getSingleResult();
paginatedList.setResultCount(resultCount.intValue());
}
/**
* Executes a paginated request with 2 native queries (one to count the number of results, and one
* to return the page).
*
* @param paginatedList Paginated list object containing parameters, and into which results are
* added by side effects
* @param queryParam Query parameters
* @param sortCriteria Sort criteria
* @return List of results
*/
public static <E> List<Object[]> executePaginatedQuery(
PaginatedList<E> paginatedList, QueryParam queryParam, SortCriteria sortCriteria) {
StringBuilder sb = new StringBuilder(queryParam.getQueryString());
sb.append(" order by c");
sb.append(sortCriteria.getColumn());
sb.append(sortCriteria.isAsc() ? " asc" : " desc");
QueryParam sortedQueryParam = new QueryParam(sb.toString(), queryParam.getParameterMap());
executeCountQuery(paginatedList, sortedQueryParam);
return executeResultQuery(paginatedList, sortedQueryParam);
}
