Question

I’m trying to output the schemaLocation attribute properly when marshalling an xjc-generated class instance. The root element class looks like:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "rootElement"
})
@XmlRootElement(name = "ROOTELEMENT")
public class ROOTELEMENT {
    // Members
}

I see there’s a package-info.java class sitting in the package where all generated classes are, with the following contents:

@javax.xml.bind.annotation.XmlSchema(
    namespace = "http://my.own.namespace", 
    elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package my.generated.classes.package;

The answer to JAXB XJC code generation – “schemaLocation” missing in xml generated by Marshaller proposes setting the Marshaller.JAXB_SCHEMA_LOCATION property, and it indeed works:

marshaller.setProperty(Marshaller.JAXB_SCHEMA_LOCATION, "http://my.own.namespace my_schema.xsd");

But I’d like to avoid typing the namespace, as in:

String namespace = getNamespace(rootElementInstance);
marshaller.setProperty(Marshaller.JAXB_SCHEMA_LOCATION, namespace + " my_schema.xsd");

I’d appreciate any tips on how to implement the getNamespace() function.

---

EDIT: I’ve seen that the XmlRootElement and XmlType annotations have the namespace() method, that seems to be what I’m after (actually, they seem to delegate on the XmlSchema provided in package-info.java). However, I cannot get an instance of ROOTELEMENT casted to any of these types.

Answer 1

You need to grab a hand on your package (for example using ROOTELEMENT.class.getPackage() if ROOTELEMENT is in the package you want). Then you can simply process it as follow:

Package package = // Here retrieve the package;
String namespace = package.getAnnotation(XmlSchema.class).namespace();
...etc...