Using JAXB 2.0 with OC4J 10.1.3.x

OC4J 10.1.3.x provides a JAXB 1.0 implementation as part of its standard runtime. If you want to use JAXB 2.x then its easy to do using the shared-library mechanism of OC4J.

As a simple test of the JAXB 2.0 capabilities, a simple application can be used that makes use of the JAXB 2.0 features. In the example used herein, the application is a simple Web application that makes use of two POJOs that are annotated with JAXB 2.0 annotations.

Build a Test Application:

package sab.demo.jaxb.model;

import java.util.ArrayList;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.annotation.*;

/**
* @author sbutton
 *
 */
@XmlType(propOrder = { "manufacturer", "model", "year", 
                     "color", "registration", "owners" })
@XmlRootElement(name = "vehicle")
@XmlAccessorType(XmlAccessType.PROPERTY)
public class Vehicle {
  long id;
  String registration;
  String manufacturer;
  String model;
  String year;
  String color;
  ArrayList<Owner> owners = new ArrayList<Owner>();

  public Vehicle() {
 // TODO Auto-generated constructor stub
  }

...
...
}

Instances of the POJOS are then created from a JSP page, where they are marshalled into an XML document and then displayed by the JSP:

<%
try {
  JAXBContext context = JAXBContext.newInstance(Vehicle.class);
  Marshaller marshaller = context.createMarshaller();
  marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);

Vehicle xtrail = new Vehicle(1L, "Nissan", "X-Trail", 
                             "2002", "Silver", "ABC-123");
  xtrail.addOwner(new Owner(1L, "Fred", "Bloggs"));

  Vehicle golf = new Vehicle(2L, "Volkswagen", "Golf", 
                             "2002", "Silver", "XYZ-123");
  golf.addOwner(new Owner(1L, "Fred", "Bloggs"));
  golf.addOwner(new Owner(2L, "Freda", "Bloggs"));

  StringWriter sw = new StringWriter();
  marshaller.marshal(xtrail,sw);
  out.println(escapeHtml(sw.toString()));

  sw = new StringWriter();
  marshaller.marshal(golf,sw);
  out.println(escapeHtml(sw.toString()));

} catch (JAXBException e) {
   e.printStackTrace(new PrintWriter(out));
}
%>

The application is then packaged up into a WAR and an EAR file ready for deployment.

Prepare the Server: Using ASC, publish a shared-library that contains the JAXB 2.0 JAR files.



Deploy the Application: When deploying the application, use the Classloading Task and import the "jaxb 2.0" shared-library so the application has access to the JAXB 2.0 implementation.



When the application is run, the Vehicle and Owner instances are marshalled to XML and displayed in the JSP page.



Voila.