I am using MOXy and classes which belong to different namespaces, but MOXy always adds the wrong namespace to the referenced object. Why is this simple example not working as expected?
AtomLink.java:
package org.atom;
@XmlAccessorType(XmlAccessType.NONE)
public class AtomLink {
@XmlAttribute
protected String rel;
@XmlAttribute(required = true)
@XmlSchemaType(name = "anyURI")
protected String href;
public AtomLink() {
}
public AtomLink(String rel, String href) {
this.rel = rel;
this.href = href;
}
}
Person.java
package org.example;
import org.atom.AtomLink;
@XmlRootElement(name = "person")
@XmlAccessorType(XmlAccessType.NONE)
public class Person {
@XmlElement
protected String name;
@XmlElement
protected AtomLink link;
public Person() {
}
public Person(String name, AtomLink link) {
this.name = name;
this.link = link;
}
}
package-info.java
@XmlSchema(namespace = "http://www.w3.org/2005/Atom", xmlns={
@XmlNs(namespaceURI = "http://www.w3.org/2005/Atom", prefix = "atom")}, elementFormDefault = XmlNsForm.QUALIFIED, attributeFormDefault = XmlNsForm.QUALIFIED)
package org.atom;
package-info.java
@XmlSchema(namespace = "http://www.test.org", xmlns={
@XmlNs(namespaceURI = "http://www.test.org", prefix = "test")}, elementFormDefault = XmlNsForm.QUALIFIED, attributeFormDefault = XmlNsForm.UNQUALIFIED)
package org.example;
Test-Code:
Person person = new Person("Test", new AtomLink("self", "http://www.test.org/person/Test"));
try {
JAXBContext context = JAXBContextFactory.createContext(new Class[] { Person.class }, null);
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(person, System.out);
} catch (JAXBException e) {
e.printStackTrace();
}
The result:
<?xml version="1.0" encoding="UTF-8"?>
<test:person xmlns:atom="http://www.w3.org/2005/Atom" xmlns:test="http://www.test.org">
<test:name>Test</test:name>
<test:link atom:rel="self" atom:href="http://www.test.org/person/Test"/>
</test:person>
But I am expecting:
...
<atom:link atom:rel="self" atom:href="http://www.test.org/person/Test"/>
...
Why is MOXy not recognising that the class AtomLink belongs to a different namespace? As you can see, only the element's namespace is wrong, but its attributes are assigned to the right namespace.
I have done the following changes as proposed. The classes look as follows:
AtomLink.java
@XmlRootElement(name = "link")
@XmlAccessorType(XmlAccessType.NONE)
public class AtomLink {
@XmlAttribute
protected String rel;
@XmlAttribute(required = true)
@XmlSchemaType(name = "anyURI")
protected String href;
public AtomLink() {
}
}
Person.java:
@XmlRootElement(name = "person")
@XmlAccessorType(XmlAccessType.NONE)
public class Person {
@XmlElement
private String name;
@XmlElementRef
private AtomLink link;
public Person() {
}
public Person(String name, AtomLink link) {
this.name = name;
this.link = link;
}
}
The result is an invalid XML document, which defines n0 as the targetNamespace for the link element, but its attributes are assigned to my atom-prefix.
<?xml version="1.0" encoding="UTF-8"?>
<test:person xmlns:test="http://www.test.org" xmlns:ns0="http://www.w3.org/2005/Atom>
<test:name>Test</test:name>
<ns0:link atom:rel="self" atom:href="http://www.test.org/person/Test"/>
</test:person>
Extending the "http://www.test.org" namespace with an atom-entry is not a solution, because that results always in a namespace declaration even if no atom-element is present in the XML document.
If I use the Java internal JAXB-Implementation everythings works as expected... There must be an error in the MOXy implementation.
What you were experiencing was a bug in MOXy that has now been fixed in the EclipseLink 2.4.2 and 2.5.0 streams. You can download a nightly build from the following location as of February 13th 2013.
In terms of the correct mapping see the answer given by Michał Politowski.