// We no longer create new TCs, we simply use the template and modify to another data tree
public static TableContext CreateNewTableContext(PSTFile file, List <TableColumnDescriptor> columns)
{
HeapOnNode heap = HeapOnNode.CreateNewHeap(file);
TableContextInfo tcInfo = new TableContextInfo();
tcInfo.rgTCOLDESC = columns;
tcInfo.UpdateDataLayout();
HeapID newUserRoot = heap.AddItemToHeap(tcInfo.GetBytes());
// The heap header may have just been updated
HeapOnNodeHeader header = heap.HeapHeader;
header.bClientSig = OnHeapTypeName.bTypeTC;
header.hidUserRoot = newUserRoot;
heap.UpdateHeapHeader(header);
BTreeOnHeapHeader bTreeHeader = new BTreeOnHeapHeader();
bTreeHeader.cbKey = TableContextRowID.RecordKeyLength;
bTreeHeader.cbEnt = TableContextRowID.RecordDataLength;
tcInfo.hidRowIndex = heap.AddItemToHeap(bTreeHeader.GetBytes());
// this will replace the item in place (as they have the same size since number of columns was not modified)
heap.ReplaceHeapItem(header.hidUserRoot, tcInfo.GetBytes());
return(new TableContext(heap, null));
}
private Subnode m_subnodeRows; // for buffering purposes
public TableContext(HeapOnNode heap, SubnodeBTree subnodeBTree)
{
m_heap = heap;
m_subnodeBTree = subnodeBTree;
m_tcInfo = new TableContextInfo(m_heap.GetHeapItem(m_heap.HeapHeader.hidUserRoot));
BTreeOnHeap <TableContextRowID> bTreeOnHeap = new BTreeOnHeap <TableContextRowID>(m_heap, m_tcInfo.hidRowIndex);
if (bTreeOnHeap.BTreeHeader.hidRoot.hidIndex > 0) // hidRoot is set to zero if the BTH is empty.
{
m_rowIndex = bTreeOnHeap.GetAll();
m_rowIndex.Sort(TableContextRowID.CompareByRowIndex);
}
m_rowsPerBlock = (int)Math.Floor((double)DataBlock.MaximumDataLength / RowLength);
}
