Specjalny codec dla danej klasy w mongodb // BsonWriter

@Override
    public void encode(BsonWriter writer, Location location, EncoderContext encoderContext) {
        writer.writeStartDocument();
        writer.writeString("world", location.getWorld().getName());
        writer.writeInt32("x", location.getBlockX());
        writer.writeInt32("y", location.getBlockY());
        writer.writeInt32("z", location.getBlockZ());
        writer.writeInt64("pitch", (long) location.getPitch());
        writer.writeInt64("yaw", (long) location.getYaw());
        writer.writeEndDocument();
    }

{"_id":{"$oid":"5eed343031e28a2ed2134656"},"world":"world","x":-70,"y":70,"z":275,"pitch":{"$numberLong":"-24"},"yaw":{"$numberLong":"104"}}

public class User {

    private String name;
    private String email;
    @JsonIgnore
    private String hashedpw;

}

CodecRegistry pojoCodecRegistry =
                fromRegistries(
                        MongoClientSettings.getDefaultCodecRegistry(),
                        fromProviders(PojoCodecProvider.builder().automatic(true).build()));

        usersCollection = db.getCollection("users", User.class).withCodecRegistry(pojoCodecRegistry);

..
.projection(excludeId()))
..