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A fork of com.sun.jersey:jersey-json:1.19.4 that uses Jackson2 instead of EOL Jackson1.
There is a newer version: 1.22.0
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010-2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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package com.sun.jersey.json.impl;

import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.nio.charset.Charset;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.PropertyException;
import javax.xml.stream.XMLStreamWriter;

import com.sun.jersey.api.json.JSONConfigurated;
import com.sun.jersey.api.json.JSONConfiguration;
import com.sun.jersey.api.json.JSONMarshaller;

/**
 * @author Jakub Podlesak (jakub.podlesak at oracle.com)
 * @author Michal Gajdos (michal.gajdos at oracle.com)
 */
public class BaseJSONMarshaller implements JSONMarshaller, JSONConfigurated {

    private static final Charset UTF8 = Charset.forName("UTF-8");

    protected final Marshaller jaxbMarshaller;
    private final JAXBContext jaxbContext;

    protected JSONConfiguration jsonConfig;

    public BaseJSONMarshaller(JAXBContext jaxbContext, JSONConfiguration jsonConfig) throws JAXBException {
        this(jaxbContext.createMarshaller(), jaxbContext, jsonConfig);
    }

    public BaseJSONMarshaller(Marshaller jaxbMarshaller, JAXBContext jaxbContext, JSONConfiguration jsonConfig) {
        this.jsonConfig = jsonConfig;
        this.jaxbContext = jaxbContext;
        this.jaxbMarshaller = jaxbMarshaller;
    }

    // JSONConfigurated

    public JSONConfiguration getJSONConfiguration() {
        return jsonConfig;
    }

    // JSONMarshaller

    public void marshallToJSON(Object o, OutputStream outputStream) throws JAXBException {
        if (outputStream == null) {
            throw new IllegalArgumentException("The output stream is null");
        }

        marshallToJSON(o, new OutputStreamWriter(outputStream, UTF8));
    }

    public void marshallToJSON(Object o, Writer writer) throws JAXBException {
        if (o == null) {
            throw new IllegalArgumentException("The JAXB element is null");
        }

        if (writer == null) {
            throw new IllegalArgumentException("The writer is null");
        }

        jaxbMarshaller.marshal(o, getXMLStreamWriter(writer, o.getClass()));
    }

    private XMLStreamWriter getXMLStreamWriter(Writer writer, Class expectedType) throws JAXBException {
        try {
            return Stax2JsonFactory.createWriter(writer, jsonConfig, expectedType, jaxbContext);
        } catch (IOException ex) {
            throw new JAXBException(ex);
        }
    }

    public void setProperty(String key, Object value) throws PropertyException {
        // do nothing
    }
}