protected override void ReadContent(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 PageAddress(this.PageID, index);
node.KeyLength = reader.ReadUInt16();
node.Key = reader.ReadBsonValue(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);
}
}
private string ReadCString(ByteReader reader)
{
var pos = 0;
while (true)
{
byte buf = reader.ReadByte();
if (buf == 0x00) break;
_strBuffer[pos++] = buf;
}
return Encoding.UTF8.GetString(_strBuffer, 0, pos);
}
protected override void ReadContent(ByteReader reader)
{
this.DataBlocks = new Dictionary<ushort, DataBlock>(ItemCount);
for (var i = 0; i < ItemCount; i++)
{
var block = new DataBlock();
block.Page = this;
block.Position = new PageAddress(this.PageID, reader.ReadUInt16());
block.ExtendPageID = reader.ReadUInt32();
var size = reader.ReadUInt16();
block.Data = reader.ReadBytes(size);
this.DataBlocks.Add(block.Position.Index, block);
}
}
/// <summary>
/// Read a BsonDocument from reader
/// </summary>
public BsonDocument ReadDocument(ByteReader reader)
{
var length = reader.ReadInt32();
var end = reader.Position + length - 5;
var obj = new BsonDocument();
while (reader.Position < end)
{
string name;
var value = this.ReadElement(reader, out name);
obj.RawValue[name] = value;
}
reader.ReadByte(); // zero
return obj;
}
/// <summary>
/// Read an BsonArray from reader
/// </summary>
public BsonArray ReadArray(ByteReader reader)
{
var length = reader.ReadInt32();
var end = reader.Position + length - 5;
var arr = new BsonArray();
while (reader.Position < end)
{
string name;
var value = this.ReadElement(reader, out name);
arr.Add(value);
}
reader.ReadByte(); // zero
return arr;
}
protected override void ReadContent(ByteReader reader)
{
this.CollectionName = reader.ReadString();
this.FreeDataPageID = reader.ReadUInt32();
this.DocumentCount = reader.ReadUInt32();
foreach (var index in this.Indexes)
{
index.Field = reader.ReadString();
index.HeadNode = reader.ReadPageAddress();
index.TailNode = reader.ReadPageAddress();
index.FreeIndexPageID = reader.ReadUInt32();
index.Options.Unique = reader.ReadBoolean();
index.Options.IgnoreCase = reader.ReadBoolean();
index.Options.TrimWhitespace = reader.ReadBoolean();
index.Options.EmptyStringToNull = reader.ReadBoolean();
index.Options.RemoveAccents = reader.ReadBoolean();
}
}
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);
this.ChangeID = reader.ReadUInt16();
this.FreeEmptyPageID = reader.ReadUInt32();
this.LastPageID = reader.ReadUInt32();
this.DbParams.Read(reader);
// 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());
}
}
protected override void ReadContent(ByteReader reader)
{
this.CollectionName = reader.ReadString();
this.FreeDataPageID = reader.ReadUInt32();
var uintCount = reader.ReadUInt32(); // read as uint (4 bytes)
foreach (var index in this.Indexes)
{
index.Field = reader.ReadString();
index.HeadNode = reader.ReadPageAddress();
index.TailNode = reader.ReadPageAddress();
index.FreeIndexPageID = reader.ReadUInt32();
index.Options.Unique = reader.ReadBoolean();
index.Options.IgnoreCase = reader.ReadBoolean();
index.Options.TrimWhitespace = reader.ReadBoolean();
index.Options.EmptyStringToNull = reader.ReadBoolean();
index.Options.RemoveAccents = reader.ReadBoolean();
}
// be compatible with v2_beta
var longCount = reader.ReadInt64();
this.DocumentCount = Math.Max(uintCount, longCount);
}
public void Read(ByteReader reader)
{
this.DbVersion = reader.ReadUInt16();
reader.Skip(198);
}
protected override void ReadContent(ByteReader reader)
{
}
/// <summary>
/// Reads an element (key-value) from an reader
/// </summary>
private BsonValue ReadElement(ByteReader reader, out string name)
{
var type = reader.ReadByte();
name = this.ReadCString(reader);
if (type == 0x01) // Double
{
return reader.ReadDouble();
}
else if (type == 0x02) // String
{
return this.ReadString(reader);
}
else if (type == 0x03) // Document
{
return this.ReadDocument(reader);
}
else if (type == 0x04) // Array
{
return this.ReadArray(reader);
}
else if (type == 0x05) // Binary
{
var length = reader.ReadInt32();
var subType = reader.ReadByte();
var bytes = reader.ReadBytes(length);
switch (subType)
{
case 0x00: return bytes;
case 0x04: return new Guid(bytes);
}
}
else if (type == 0x07) // ObjectId
{
return new ObjectId(reader.ReadBytes(12));
}
else if (type == 0x08) // Boolean
{
return reader.ReadBoolean();
}
else if (type == 0x09) // DateTime
{
var ts = reader.ReadInt64();
// catch specific values for MaxValue / MinValue #19
if (ts == 253402300800000) return DateTime.MaxValue;
if (ts == -62135596800000) return DateTime.MinValue;
return BsonValue.UnixEpoch.AddMilliseconds(ts).ToLocalTime();
}
else if (type == 0x0A) // Null
{
return BsonValue.Null;
}
else if (type == 0x10) // Int32
{
return reader.ReadInt32();
}
else if (type == 0x12) // Int64
{
return reader.ReadInt64();
}
else if (type == 0xFF) // MinKey
{
return BsonValue.MinValue;
}
else if (type == 0x7F) // MaxKey
{
return BsonValue.MaxValue;
}
throw new NotSupportedException("BSON type not supported");
}
private string ReadString(ByteReader reader)
{
var length = reader.ReadInt32();
var bytes = reader.ReadBytes(length - 1);
reader.ReadByte(); // discard \x00
return Encoding.UTF8.GetString(bytes);
}
protected override void ReadContent(ByteReader reader)
{
this.Data = reader.ReadBytes(this.ItemCount);
}
protected override void ReadContent(ByteReader reader)
{
this.CollectionName = reader.ReadString();
this.DocumentCount = reader.ReadInt64();
this.FreeDataPageID = reader.ReadUInt32();
foreach (var index in this.Indexes)
{
index.Field = reader.ReadString();
index.Unique = reader.ReadBoolean();
index.HeadNode = reader.ReadPageAddress();
index.TailNode = reader.ReadPageAddress();
index.FreeIndexPageID = reader.ReadUInt32();
}
}
protected abstract void ReadContent(ByteReader reader);
