MessagePack JSON Provider

Purpose

This library is an alternative JsonProvider for JSON-P and JSON-B which lets you serialize Java objects to binary streams in MessagePack format, and vice versa.

Basic Usage

// Create Jsonb instance with custom JSON-P provider
Jsonb jsonb = JsonbBuilder.newBuilder().withProvider(new MessagePackJsonProvider()).build();

// Java to MessagePack
Person person = new Person("Mickey", "Mouse");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
jsonb.toJson(person, baos);

// MessagePack to Java
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
Person deserialized = jsonb.fromJson(bais, Person.class);

Motivation

The existing msgpack-java project contains a Java data binding library based on Jackson.

Working in a Java EE 8 environment, it would be a burden to use another Java-to-Json-binding solution (i.e. Jackson) on top of the one provided by the platform (i.e. JSON-B).

This library avoids the Jackson dependency by using msgpack-core together with a custom JSON-P provider which serializes to and from MessagePack instead of JSON.

The more complex part of Java data binding is completely left to JSON-B.

At the moment, this library is only tested with the Yasson reference implementation.