protected override void ReadContent(LiteDB.ByteReader reader)
{
this.Nodes = new Dictionary <ushort, IndexNode>(this.ItemCount);
for (var i = 0; i < this.ItemCount; i++)
{
var index = reader.ReadUInt16();
var levels = reader.ReadByte();
var node = new IndexNode(levels);
node.Page = this;
node.Position = new LiteDB.PageAddress(this.PageID, index);
node.KeyLength = reader.ReadUInt16();
node.Key = ReadBsonValue(reader, node.KeyLength);
node.DataBlock = reader.ReadPageAddress();
for (var j = 0; j < node.Prev.Length; j++)
{
node.Prev[j] = reader.ReadPageAddress();
node.Next[j] = reader.ReadPageAddress();
}
this.Nodes.Add(node.Position.Index, node);
}
}
protected override void ReadContent(LiteDB.ByteReader reader)
{
reader.ReadString(HEADER_INFO.Length);
reader.ReadByte();
this.ChangeID = reader.ReadUInt16();
this.FreeEmptyPageID = reader.ReadUInt32();
this.LastPageID = reader.ReadUInt32();
this.DbVersion = reader.ReadUInt16();
this.Password = reader.ReadBytes(this.Password.Length);
// read page collections references (position on end of page)
var cols = reader.ReadByte();
for (var i = 0; i < cols; i++)
{
this.CollectionPages.Add(reader.ReadString(), reader.ReadUInt32());
}
}
/// <summary>
/// Read a page with correct instance page object. Checks for pageType
/// </summary>
public static BasePage ReadPage(byte[] buffer)
{
var reader = new LiteDB.ByteReader(buffer);
var pageID = reader.ReadUInt32();
var pageType = (PageType)reader.ReadByte();
var page = CreateInstance(pageID, pageType);
page.ReadHeader(reader);
page.ReadContent(reader);
return(page);
}
/// <summary>
/// Write a custom ReadBsonValue because BsonType changed from v6 to v7
/// </summary>
private LiteDB.BsonValue ReadBsonValue(LiteDB.ByteReader reader, ushort length)
{
var type = reader.ReadByte();
// using numbers because BsonType changed
switch (type)
{
case 1: return(LiteDB.BsonValue.Null);
case 2: return(reader.ReadInt32());
case 3: return(reader.ReadInt64());
case 4: return(reader.ReadDouble());
case 5: return(reader.ReadString(length));
case 6: return(new LiteDB.BsonReader(false).ReadDocument(reader));
case 7: return(new LiteDB.BsonReader(false).ReadArray(reader));
case 8: return(reader.ReadBytes(length));
case 9: return(reader.ReadObjectId());
case 10: return(reader.ReadGuid());
case 11: return(reader.ReadBoolean());
case 12: return(reader.ReadDateTime());
case 13: return(reader.ReadDateTimeOffset(length));
case 0: return(LiteDB.BsonValue.MinValue);
case 14: return(LiteDB.BsonValue.MaxValue);
}
throw new NotImplementedException();
}