private static void WriteCString(ByteWriter writer, string s)
{
var bytes = Encoding.UTF8.GetBytes(s);
writer.Write(bytes);
writer.Write((byte)0x00);
}
protected override void WriteContent(ByteWriter writer)
{
foreach (var block in _dataBlocks.Values)
{
writer.Write(block.Position.Index);
writer.Write(block.ExtendPageID);
writer.Write((ushort)block.Data.Length);
writer.Write(block.Data);
}
}
public static void WriteArray(ByteWriter writer, BsonArray array)
{
writer.Write(array.GetBytesCount(false));
for (var i = 0; i < array.Count; i++)
{
WriteElement(writer, i.ToString(), array[i] ?? BsonValue.Null);
}
writer.Write((byte)0x00);
}
/// <summary>
/// Write a bson document
/// </summary>
public static void WriteDocument(ByteWriter writer, BsonDocument doc)
{
writer.Write(doc.GetBytesCount(false));
foreach (var key in doc.Keys)
{
WriteElement(writer, key, doc[key] ?? BsonValue.Null);
}
writer.Write((byte)0x00);
}
protected override void WriteContent(ByteWriter writer)
{
foreach (var node in _nodes.Values)
{
writer.Write(node.Position.Index); // node Index on this page
writer.Write((byte)node.Prev.Length); // level length
writer.Write(node.Slot); // index slot
writer.Write(node.PrevNode); // prev node list
writer.Write(node.NextNode); // next node list
writer.Write(node.KeyLength); // valueLength
writer.WriteBsonValue(node.Key, node.KeyLength); // value
writer.Write(node.DataBlock); // data block reference
for (var j = 0; j < node.Prev.Length; j++)
{
writer.Write(node.Prev[j]);
writer.Write(node.Next[j]);
}
}
}
private void WriteHeader(ByteWriter writer)
{
writer.Write(this.PageID);
writer.Write((byte)this.PageType);
writer.Write(this.PrevPageID);
writer.Write(this.NextPageID);
writer.Write((UInt16)this.ItemCount);
writer.Write((UInt16)this.FreeBytes);
writer.Skip(8); // reserved 8 bytes
}
protected override void WriteContent(ByteWriter writer)
{
writer.Write(this.CollectionName);
writer.Write(this.DocumentCount);
writer.Write(this.FreeDataPageID);
foreach (var index in this.Indexes)
{
// write Field+Expression only if index are used
if (index.Field.Length > 0)
{
writer.Write(index.Field + "=" + "$." + index.Field);
}
else
{
writer.Write("");
}
writer.Write(index.Unique);
writer.Write(index.HeadNode);
writer.Write(index.TailNode);
writer.Write(index.FreeIndexPageID);
}
// position on page-footer (avoid file structure change)
writer.Position = BasePage.PAGE_SIZE - 8 - CollectionIndex.INDEX_PER_COLLECTION;
foreach (var index in this.Indexes)
{
writer.Write(index.MaxLevel);
}
writer.Write(this.Sequence);
}
private static void WriteElement(ByteWriter writer, string key, BsonValue value)
{
// cast RawValue to avoid one if on As<Type>
switch (value.Type)
{
case BsonType.Double:
writer.Write((byte)0x01);
WriteCString(writer, key);
writer.Write((Double)value.RawValue);
break;
case BsonType.String:
writer.Write((byte)0x02);
WriteCString(writer, key);
WriteString(writer, (String)value.RawValue);
break;
case BsonType.Document:
writer.Write((byte)0x03);
WriteCString(writer, key);
WriteDocument(writer, (BsonDocument)value);
break;
case BsonType.Array:
writer.Write((byte)0x04);
WriteCString(writer, key);
WriteArray(writer, new BsonArray((List <BsonValue>)value.RawValue));
break;
case BsonType.Binary:
writer.Write((byte)0x05);
WriteCString(writer, key);
var bytes = (byte[])value.RawValue;
writer.Write(bytes.Length);
writer.Write((byte)0x00); // subtype 00 - Generic binary subtype
writer.Write(bytes);
break;
case BsonType.Guid:
writer.Write((byte)0x05);
WriteCString(writer, key);
var guid = ((Guid)value.RawValue).ToByteArray();
writer.Write(guid.Length);
writer.Write((byte)0x04); // UUID
writer.Write(guid);
break;
case BsonType.ObjectId:
writer.Write((byte)0x07);
WriteCString(writer, key);
writer.Write(((ObjectId)value.RawValue).ToByteArray());
break;
case BsonType.Boolean:
writer.Write((byte)0x08);
WriteCString(writer, key);
writer.Write((byte)(((Boolean)value.RawValue) ? 0x01 : 0x00));
break;
case BsonType.DateTime:
writer.Write((byte)0x09);
WriteCString(writer, key);
var date = (DateTime)value.RawValue;
// do not convert to UTC min/max date values - #19
var utc = (date == DateTime.MinValue || date == DateTime.MaxValue) ? date : date.ToUniversalTime();
var ts = utc - BsonValue.UnixEpoch;
writer.Write(Convert.ToInt64(ts.TotalMilliseconds));
break;
case BsonType.Null:
writer.Write((byte)0x0A);
WriteCString(writer, key);
break;
case BsonType.Int32:
writer.Write((byte)0x10);
WriteCString(writer, key);
writer.Write((Int32)value.RawValue);
break;
case BsonType.Int64:
writer.Write((byte)0x12);
WriteCString(writer, key);
writer.Write((Int64)value.RawValue);
break;
case BsonType.Decimal:
writer.Write((byte)0x13);
WriteCString(writer, key);
writer.Write((Decimal)value.RawValue);
break;
case BsonType.MinValue:
writer.Write((byte)0xFF);
WriteCString(writer, key);
break;
case BsonType.MaxValue:
writer.Write((byte)0x7F);
WriteCString(writer, key);
break;
}
}
protected override void WriteContent(ByteWriter writer)
{
writer.Write(_data);
}
protected override void WriteContent(ByteWriter writer)
{
writer.Write(HEADER_INFO, HEADER_INFO.Length);
writer.Write(FILE_VERSION);
writer.Write(this.ChangeID);
writer.Write(this.FreeEmptyPageID);
writer.Write(this.LastPageID);
writer.Write(this.UserVersion);
writer.Write(this.Password);
writer.Write(this.Salt);
writer.Write((byte)this.CollectionPages.Count);
foreach (var key in this.CollectionPages.Keys)
{
writer.Write(key);
writer.Write(this.CollectionPages[key]);
}
writer.Position = BasePage.PAGE_SIZE - 1;
writer.Write(this.Recovery);
}
