/// <summary>
/// Reorder the database and index rows with the dictionary of row - location in <param name="rowsToMove">.
/// </summary>
/// <param name="rowsToMove">
/// Dictionary of row - location.
/// </param>
private void RearrangeRowsAndIndex(Dictionary <Row, int> rowsToMove)
{
// Set the new sizes of both the index and database file.
DataBaseStream.SetLength(((RowCount - DeletedRowCount) * ROW_BYTE_SIZE) + HEADER_BYTE_SIZE);
IndexStream.SetLength((RowCount - DeletedRowCount) * INDEX_ROW_BYTE_SIZE);
// Write each row to it's new location. Write each index keyvalue pair of primary key location to the index file.
// Update the object index.
foreach (KeyValuePair <Row, int> data in rowsToMove)
{
Index [data.Key.PrimaryKey] = data.Value;
WriteRow(data.Key, data.Key.PrimaryKey, WriteType.RowMove);
WriteIndexRow(data.Key.PrimaryKey, data.Value, WriteType.IndexRowMove);
}
// Update the row count accordingly and reassign deleted rows the value of 0. We've just compacted!
RowCount -= DeletedRowCount;
DeletedRowCount = 0;
DataBaseStream.Position = HEADER_INFO_NUM_ROWS;
// Write that to the database header.
DataBaseWriter.Write(RowCount);
DataBaseWriter.Write(DeletedRowCount);
}
