public static Object deserializeObject(byte[] data) throws IOException {
    if (data == null || data.length < 1) {
        return null;
    }
    Object object = null;
    try {
        ObjectInputStream objectStream = new ObjectInputStream(new ByteArrayInputStream(data));
        object = objectStream.readObject();
        objectStream.close();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
}

GET /rest/api/graph