public class TupleCodec implements Codec<Tuple> {
	@Override
	public Tuple decode(BsonReader reader, DecoderContext decoderContext) {
		DocumentCodec documentCodec = new DocumentCodec(  );
		Document document = documentCodec.decode( reader,decoderContext );
		MongoDBTupleSnapshot snapshot = new MongoDBTupleSnapshot( document,null );
		return new Tuple( snapshot, Tuple.SnapshotType.UNKNOWN );
	}

	@Override
	public void encode(BsonWriter writer, Tuple value, EncoderContext encoderContext) {
		MongoDBTupleSnapshot snapshot = (MongoDBTupleSnapshot) value.getSnapshot();
		Document document = snapshot.getDbObject();
		DocumentCodec documentCodec = new DocumentCodec(  );
		documentCodec.encode( writer,document,encoderContext );
	}
...
}