protected BTreePage(ReaderBase reader, uint page, BTreeHeader header, ushort[] cellOffsets)
{
Reader = reader;
Page = page;
Header = header;
CellOffsets = cellOffsets;
}
internal static BTreePage Parse(ReaderBase reader, uint page)
{
// Read header
reader.SeekPage(page);
if (page == 1)
{
// Skip the first 100 bytes
reader.Skip(DatabaseHeader.HeaderSize);
}
BTreeHeader header = BTreeHeader.Parse(reader);
// Read cells
ushort[] cellOffsets = new ushort[header.CellCount];
for (ushort i = 0; i < header.CellCount; i++)
{
cellOffsets[i] = reader.ReadUInt16();
}
Array.Sort(cellOffsets);
BTreePage res;
switch (header.Type)
{
case BTreeType.InteriorIndexBtreePage:
throw new ArgumentOutOfRangeException();
case BTreeType.InteriorTableBtreePage:
res = new BTreeInteriorTablePage(reader, page, header, cellOffsets);
break;
case BTreeType.LeafIndexBtreePage:
throw new ArgumentOutOfRangeException();
case BTreeType.LeafTableBtreePage:
res = new BTreeLeafTablePage(reader, page, header, cellOffsets);
break;
default:
throw new ArgumentOutOfRangeException();
}
res.ParseInternal();
return(res);
}
public BTreeInteriorTablePage(ReaderBase reader, uint page, BTreeHeader header, ushort[] cellOffsets)
: base(reader, page, header, cellOffsets)
{
}
