Controlling namespace prefixes in JAXB

Question

How does jaxb determine the list of namespace prefix declarations whem marshalling an object? I used xjc to compile java classes for ebics (ebics schema). When I create an i

Answer 1

I generated my JAXB classes using xjc, but the SOAP WebService i am using force me to follow some rules, like not using namespace prefix.

This is invalid:

     123
     
         
     

This is valid:

    123
    
        
     

As pointed out, JAXB put the namespace declaration at the root element.

To overcome this, the first approach i use is to avoid unnecessary elements in the context.

For example, setting the context of the marshaller like this:

JAXBContext.newInstance("path.to.package");

Can lead JAXB to make some unncessary declarations of namespaces.

Sometimes, i can get ride of an annoying xmlns="http://www.w3.org/2000/09/xmldsig#" just setting the context with the necessary Root Element:

JAXBContext.newInstance(MyRootElement.class);

A second approach i use when the first is not enough, is to make the entire context use the same namespace. Just changing the unwanted "http://www.w3.org/2000/09/xmldsig#", in every namespace declaration (like @XmlElement or @XSchema), to the unique namespace allowed (http://www.portalfiscal.inf.br/nfe)

Then, i just create an attribute at the desired child:

@XmlAttribute(name="xmlns")
String xmlns = "http://www.w3.org/2000/09/xmldsig#";

Now i have the namespace declaration out of the root, in the correct element, without using any prefix.