/**
* Add a new row to the database. If this is to be the first row added to the database you must
* have called setColumnNames() before.
*
* @param itemset the new row to be added to the data file
* @exception IOException from library call
* @exception DBException column names have not been set or an invalid item was contained in the
* itemset
*/
public void addRow(Itemset itemset) throws IOException, DBException {
if (wroteColumnNames == false) throw new DBException("Column names must be set first");
int size = itemset.size();
for (int i = 0; i < size; i++)
if (itemset.get(i) > numColumns) throw new DBException("Attempt to write invalid item");
if (needReposition == true) {
outStream.seek(lastPosition);
needReposition = false;
}
outStream.writeInt(size);
CRC = updateCRC(CRC, size);
int item;
for (int i = 0; i < size; i++) {
item = itemset.get(i);
outStream.writeInt(item);
CRC = updateCRC(CRC, item);
}
numRows++;
}
