Jaxb XML Attribute

Question

I am doing marshalling of java object to XML using JAXB . I had requirement to create some thing like

<link rel="self" href="test" />

How this can be done? what annotations should i use.

Any help will be greatly appriciated

Java Class

public class Item {

    private String title;
    private int price;

    private String productLink;
    private String rel;

    public String getTitle() {
    return title;
    }

    public void setTitle(String title) {
    this.title = title;
    }

    public int getPrice() {
    return price;
    }

    public void setPrice(int price) {
    this.price = price;
    }

    @XmlPath("link/@href")
    public String getProductLink() {
    return productLink;
    }

    public void setProductLink(String productLink) {
    this.productLink = productLink;
    }

@ jtahlborn thanks for the suggestion, i need it urgently thats why i posted — user964147
– user964147, Commented May 8, 2013 at 20:00
sorry, the rest of the world isn't going to do your job for you, no matter how "urgent" it is for you. — jtahlborn
– jtahlborn, Commented May 8, 2013 at 20:01

bdoughan · Accepted Answer · 2013-05-08 20:29:23Z

You can create a Link class annotated with @XmlRootElement with to properties (rel and href) that are annotated with @XmlAttribute.

The following tutorial will help get you acquainted with JAXB (JSR-222):

http://wiki.eclipse.org/EclipseLink/Examples/MOXy/GettingStarted

OPTION #1 - Using EclipseLink JAXB (MOXy) as your JAXB Provider

Using the @XmlPath extension in EclipseLink JAXB (MOXy) you could do the following:

@XmlPath("link[@rel='self']/@href")
public String getProductLink() {
    return productLink;
}

For More Information

http://blog.bdoughan.com/2011/03/map-to-element-based-on-attribute-value.html

OPTION #2 - Using an JAXB Provider

You could use an XmlAdapter

@XmlElement(name="link")
@XmlJavaTypeAdapter(LinkAdapter.class)
public String getProductLink() {
    return productLink;
}

LinkAdapter

import javax.xml.bind.annotation.*;
import javax.xml.bind.annotation.adapters.XmlAdapter;

public class LinkAdapter extends XmlAdapter<LinkAdapter.Link, String>{

    public static class Link {

        @XmlAttribute
        public String rel = "self";

        @XmlAttribute
        public String href;
    }

    @Override
    public String unmarshal(Link v) throws Exception {
        return v.href;
    }

    @Override
    public Link marshal(String v) throws Exception {
        Link link = new Link();
        link.href = v;
        return link;
    }

}

thank you very much for your kind response, isn't possible some thing like @XmlPath("link/@href"). I did'nt understand how to give 'rel' as well to the same path
@user964147 - There are many ways to map this. Could you update your question to include the class structure you are trying to map this XML to?

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