private IBPlusTreeNode <TKey> PageToNode(IPage page)
{
var node = page.BackingObject as IBPlusTreeNode <TKey>;
if (node != null)
{
return(node);
}
var header = (BPlusTreeNodePageHeader)PageFormatter.GetPageHeader(page);
List <DbItem> items = PageFormatter.ReadFixedSizeItems(page);
var result = new BPlusTreeNode <TKey>(page.Index, items.Count)
{
IsLeaf = header.IsLeaf,
ParentNodeIndex = header.ParentPageIndex,
PreviousNodeIndex = header.PreviousPageIndex,
NextNodeIndex = header.NextPageIndex
};
int cnt = items.Count;
for (int i = 0; i < cnt; i++)
{
result.Entries.Add(IndexEntryFromBytes(items[i].RawData));
}
page.BackingObject = result;
if (_nodeEntrySizeRange != header.SizeRange)
{
throw new DataTankerException("Mismatch key size"); // TODO: specify possible size range
}
return(result);
}