serialization/src/example/JSONSerializer.java

/*******************************************************************************
 * Copyright (c) 1998, 2012 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the 
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 
 * which accompanies this distribution. 
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at 
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *      Oracle - initial impl
 ******************************************************************************/
package example;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

import model.Order;

/**
 * Uses EclipseLink Moxy to convert an object to JSON.
 * @author James Sutherland
 */
public class JSONSerializer implements Serializer {
    JAXBContext context;
    Marshaller marshaller;
    Unmarshaller unmarshaller;
    
    public JSONSerializer() {
        try {
            this.context = JAXBContext.newInstance(Order.class);
            marshaller = this.context.createMarshaller();
            marshaller.setProperty("eclipselink.media-type", "application/json");
            unmarshaller = this.context.createUnmarshaller();
            unmarshaller.setProperty("eclipselink.media-type", "application/json");
        } catch (JAXBException exception) {
            throw new RuntimeException(exception);
        }
    }
    
    public byte[] serialize(Object object) {
        try {
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            //StringWriter writer = new StringWriter();
            marshaller.marshal(object, stream);
            return stream.toByteArray();
        } catch (JAXBException exception) {
            throw new RuntimeException(exception);
        }
    }
    
    public Object deserialize(byte[] bytes) {
        try {
            ByteArrayInputStream stream = new ByteArrayInputStream(bytes);
            //StringReader reader = new StringReader(new String(bytes));
            return unmarshaller.unmarshal(stream);
        } catch (JAXBException exception) {
            throw new RuntimeException(exception);
        }
    }
    
    public String toString() {
        return getClass().getSimpleName();
    }
}