// TODO - For a performance improvement, it would be better to return an instance of
//an iterator and use that instance throughout, rather than recreating one and
//having to move it to the right position.
int startIndex = block * DBCellRecord.BLOCK_SIZE;
Iterator rowIter = _rowRecords.values().iterator();
RowRecord row = null;
//Position the iterator at the start of the block
for (int i=0; i<=startIndex;i++) {
row = (RowRecord)rowIter.next();
}
if (row == null) {
throw new RuntimeException("Did not find start row for block " + block);
}
return row.getRowNumber();
}