@Override
 public QNameFilter find(final Workspace workspace, final String name) {
   final String sql =
       "select id,name,workspace_id from " + this.tableName + " where name=? and workspace_id=?";
   final QNameFilter filter =
       DataAccessUtils.uniqueResult(
           this.jt.query(sql, new FilterMapper(), name, workspace.getId()));
   addFilterMembers(filter);
   return filter;
 }
 @Override
 public List<QNameFilter> list(final Workspace ws) {
   final String sql =
       "select id,name,workspace_id from " + this.tableName + " where workspace_id=?";
   return this.jt.query(sql, new FilterMapper(), ws.getId());
 }