public byte[] GetPageBytes(PagePointer loc, bool putResultToCache = true)
{
if (!_backupMode)
{
return(_bufferManager.GetPageBytes(loc.FileID, loc.PageID, putResultToCache));
}
//var pagesInFile = (int)(bufferManager.GetFileLen(loc.FileID) / 8192);
//var pages = Enumerable.Range(0, pagesInFile).Select(x => new PagePointer(loc.FileID, x)).ToArray();
//var result = ( from pagePointer in pages
// let pageHeaderBytes = bufferManager.GetHeaderBytes(pagePointer.FileID, pagePointer.PageID)
// let pageHeader = new PageHeader(pageHeaderBytes)
// select new Tuple<PagePointer, PagePointer>(pagePointer, pageHeader.Pointer)
// ).ToList();
//File.WriteAllText("test.loc.txt", string.Join(Environment.NewLine, result.Select(x => x.Item1 + " -> " + x.Item2)));
if (_backupPagesMap.TryGetValue(loc.FileID, out var loc1) && loc1.TryGetValue(loc.PageID / 8, out var loc2))
{
return(_bufferManager.GetPageBytes(loc2.FileID, loc2.PageID + loc.PageID % 8, putResultToCache));
}
var pointer = BinarySearch(x => new PageHeader(_bufferManager.GetHeaderBytes(loc.FileID, x * 8)).Pointer,
0, (long)_bufferManager.GetFileLen(loc.FileID) / (8192 * 8), loc);
return(_bufferManager.GetPageBytes(pointer.FileID, pointer.PageID + loc.PageID % 8, putResultToCache));
}
internal PrimaryRecordPage GetPrimaryRecordPage(PagePointer loc, CompressionContext compression)
{
Debug.WriteLine("Loading Primary Record Page " + loc);
return(new PrimaryRecordPage(bufferManager.GetPageBytes(loc.FileID, loc.PageID), compression, this));
}