public boolean isBeforeFirst() throws SQLException {
        checkState();

        return rs.isBeforeFirst();
    }
Indicates whether the cursor is before the first row in
this rowset's <code>ResultSet</code> object.

@return <code>true</code> if the cursor is before the first row;
<code>false</code> if the cursor is at any other position or the
result set contains no rows
@throws SQLException if a database access error occurs
           or this rowset does not currently have a valid
           connection, prepared statement, and result set
src/main/java/org/replicadb/rowset/sun/rowset/JdbcRowSetImpl.java