protected override void ReadContent(ByteReader reader)
{
var info = reader.ReadString(HEADER_INFO.Length);
var ver = reader.ReadByte();
if (info != HEADER_INFO)
{
throw LiteException.InvalidDatabase();
}
if (ver != FILE_VERSION)
{
throw LiteException.InvalidDatabaseVersion(ver);
}
ChangeID = reader.ReadUInt16();
FreeEmptyPageID = reader.ReadUInt32();
LastPageID = reader.ReadUInt32();
UserVersion = reader.ReadUInt16();
Password = reader.ReadBytes(Password.Length);
Salt = reader.ReadBytes(Salt.Length);
// read page collections references (position on end of page)
var cols = reader.ReadByte();
for (var i = 0; i < cols; i++)
{
CollectionPages.Add(reader.ReadString(), reader.ReadUInt32());
}
// use last page byte position for recovery mode only because i forgot to reserve area before collection names!
// TODO: fix this in next change data structure
reader.Position = PAGE_SIZE - 1;
Recovery = reader.ReadBoolean();
}
/// <summary>
/// Read a page with correct instance page object. Checks for pageType
/// </summary>
public static BasePage ReadPage(byte[] buffer)
{
var reader = new ByteReader(buffer);
var pageID = reader.ReadUInt32();
var pageType = (PageType)reader.ReadByte();
if (pageID == 0 && (byte)pageType > 5)
{
throw LiteException.InvalidDatabase();
}
var page = CreateInstance(pageID, pageType);
page.ReadHeader(reader);
page.ReadContent(reader);
page.DiskData = buffer;
return(page);
}
