/// <summary>
/// Creates an empty BSON document.
/// <param name="useStringTable">Whether or not to generate and use a string table.</param>
/// </summary>
public BsonDocument(
BsonStringTableMode mode = BsonStringTableMode.None,
Dictionary <int, string> reverseStringTable = null)
{
_stringTableMode = mode;
_stringTable = new Dictionary <string, int>();
_reverseStringTable = reverseStringTable;
Top = new BsonItem();
}
private void WriteItem(EasyWriter writer, BsonItem item, string name, bool isTop = false, bool isArray = false)
{
if (!isTop)
{
writer.Write(item.Type);
writer.Write(isArray ? name : GetKeyName(name), Encoding.UTF8, true);
}
if (item.HasValues) // object or array - we need to write a document
{
var stream = new MemoryStream();
var vWriter = new EasyWriter(stream);
foreach (string key in item.Keys)
{
WriteItem(vWriter, item[key], key, false, item.IsArray);
}
vWriter.Close();
var data = stream.ToArray();
// length of data + length of length + null terminator
writer.Write(data.Length + 4 + 1);
writer.Write(data);
writer.Write((byte)0x00);
return;
}
switch (item.Type)
{
case 0x01: // double
writer.Write((double)item.Value);
break;
case 0x02: // string
var bytes = Encoding.UTF8.GetBytes(GetKeyName((string)item.Value, true));
writer.Write(bytes.Length + 1); // includes null terminator
writer.WriteBytes(bytes);
writer.Write((byte)0x00);
break;
case 0x05: // binary
var byteArray = (byte[])item.Value;
writer.Write(byteArray.Length);
writer.Write((byte)0x00);
writer.Write(byteArray);
break;
case 0x07: // objectid
writer.Write((byte[])item.Value);
break;
case 0x08: // bool
writer.Write((bool)item.Value);
break;
case 0x09: // UTC datetime
case 0x11: // timestamp
case 0x12: // 64 bit int
writer.Write((long)item.Value);
break;
case 0x10: // 32 bit int
writer.Write((int)item.Value);
break;
default:
throw new NotSupportedException($"Item type {item.Type} not supported.");
}
}
