BsonDocument to binary using Java

[Roy Kim]

Hello, group.

I'm trying to encode BsonDocument to binary and transfer with Thrift's binary transformation.

After receiving the binary. decode and use it

I just can't find a way to do it with java.

Hope there is something like below.

BsonDocument bsonDocument = new BsonDocument (~~~);

byte[] binary = bsonDocument.encode();

//send binary with RPC

//receive binary.

BsonDocument  receivedBsonDocument = BsonDocument.decode(binary);

Does anyone know anything similar to this?

[Jeff Yemin]

Hi Roy,

You can use the RawBsonDocument class to handle the encoding and decoding for you:

BsonDocument document = new BsonDocument("x", new BsonInt32(1));

RawBsonDocument rawBsonDocument = new RawBsonDocument(document,
        new BsonDocumentCodec());

ByteBuffer byteBuffer = rawBsonDocument.getByteBuffer().asNIO();

// Thift ...

// not really safe to call ByteBuffer.array(), but doing it for simplicity here
byte[] bytes = byteBuffer.array();

RawBsonDocument rawBsonDocument2 = new RawBsonDocument(bytes);

BsonDocument decodedDocument = rawBsonDocument2.decode(new BsonDocumentCodec());

Note also that you can avoid the initial decoding of the document by going directly to RawBsonDocument from MongoCollection:

MongoCollection<RawBsonDocument> coll = database.getCollection("test", RawBsonDocument.class);          

Regards,

Jeff